* doc/install.texi (Configuration): Document --datadir.
[gcc.git] / gcc / doc / install.texi
1 \input texinfo.tex @c -*-texinfo-*-
2 @c @ifnothtml
3 @c %**start of header
4 @setfilename gccinstall.info
5 @settitle Installing GCC
6 @setchapternewpage odd
7 @c %**end of header
8 @c @end ifnothtml
9
10 @c Specify title for specific html page
11 @ifset indexhtml
12 @settitle Installing GCC
13 @end ifset
14 @ifset specifichtml
15 @settitle Host/Target specific installation notes for GCC
16 @end ifset
17 @ifset downloadhtml
18 @settitle Downloading GCC
19 @end ifset
20 @ifset configurehtml
21 @settitle Installing GCC: Configuration
22 @end ifset
23 @ifset buildhtml
24 @settitle Installing GCC: Building
25 @end ifset
26 @ifset testhtml
27 @settitle Installing GCC: Testing
28 @end ifset
29 @ifset finalinstallhtml
30 @settitle Installing GCC: Final installation
31 @end ifset
32 @ifset binarieshtml
33 @settitle Installing GCC: Binaries
34 @end ifset
35 @ifset oldhtml
36 @settitle Installing GCC: Old documentation
37 @end ifset
38 @ifset gfdlhtml
39 @settitle Installing GCC: GNU Free Documentation License
40 @end ifset
41
42 @c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
43 @c 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
44 @c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
45
46 @c Include everything if we're not making html
47 @ifnothtml
48 @set indexhtml
49 @set specifichtml
50 @set downloadhtml
51 @set configurehtml
52 @set buildhtml
53 @set testhtml
54 @set finalinstallhtml
55 @set binarieshtml
56 @set oldhtml
57 @set gfdlhtml
58 @end ifnothtml
59
60 @c Part 2 Summary Description and Copyright
61 @macro copyrightnotice
62 Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
63 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
64 @sp 1
65 Permission is granted to copy, distribute and/or modify this document
66 under the terms of the GNU Free Documentation License, Version 1.1 or
67 any later version published by the Free Software Foundation; with no
68 Invariant Sections, the Front-Cover texts being (a) (see below), and
69 with the Back-Cover Texts being (b) (see below). A copy of the
70 license is included in the section entitled ``@uref{./gfdl.html,,GNU
71 Free Documentation License}''.
72
73 (a) The FSF's Front-Cover Text is:
74
75 A GNU Manual
76
77 (b) The FSF's Back-Cover Text is:
78
79 You have freedom to copy and modify this GNU Manual, like GNU
80 software. Copies published by the Free Software Foundation raise
81 funds for GNU development.
82 @end macro
83 @ifinfo
84 @copyrightnotice{}
85 @end ifinfo
86
87 @c Part 3 Titlepage and Copyright
88 @titlepage
89 @sp 10
90 @comment The title is printed in a large font.
91 @center @titlefont{Installing GCC}
92
93 @c The following two commands start the copyright page.
94 @page
95 @vskip 0pt plus 1filll
96 @copyrightnotice{}
97 @end titlepage
98
99 @c Part 4 Top node and Master Menu
100 @ifinfo
101 @node Top, , , (dir)
102 @comment node-name, next, Previous, up
103
104 @menu
105 * Installing GCC:: This document describes the generic installation
106 procedure for GCC as well as detailing some target
107 specific installation instructions.
108
109 * Specific:: Host/target specific installation notes for GCC.
110 * Binaries:: Where to get pre-compiled binaries.
111
112 * Old:: Old installation documentation.
113
114 * GNU Free Documentation License:: How you can copy and share this manual.
115 * Concept Index:: This index has two entries.
116 @end menu
117 @end ifinfo
118
119 @c Part 5 The Body of the Document
120 @c ***Installing GCC**********************************************************
121 @ifnothtml
122 @comment node-name, next, previous, up
123 @node Installing GCC, Binaries, , Top
124 @end ifnothtml
125 @ifset indexhtml
126 @ifnothtml
127 @chapter Installing GCC
128 @end ifnothtml
129
130 The latest version of this document is always available at
131 @uref{http://gcc.gnu.org/install/,,http://gcc.gnu.org/install/}.
132
133 This document describes the generic installation procedure for GCC as well
134 as detailing some target specific installation instructions.
135
136 GCC includes several components that previously were separate distributions
137 with their own installation instructions. This document supersedes all
138 package specific installation instructions.
139
140 @emph{Before} starting the build/install procedure please check the
141 @ifnothtml
142 @ref{Specific, host/target specific installation notes}.
143 @end ifnothtml
144 @ifhtml
145 @uref{specific.html,,host/target specific installation notes}.
146 @end ifhtml
147 We recommend you browse the entire generic installation instructions before
148 you proceed.
149
150 Lists of successful builds for released versions of GCC are
151 available at @uref{http://gcc.gnu.org/buildstat.html}.
152 These lists are updated as new information becomes available.
153
154 The installation procedure itself is broken into five steps.
155
156 @ifinfo
157 @menu
158 * Downloading the source::
159 * Configuration::
160 * Building::
161 * Testing:: (optional)
162 * Final install::
163 @end menu
164 @end ifinfo
165 @ifhtml
166 @enumerate
167 @item
168 @uref{download.html,,Downloading the source}
169 @item
170 @uref{configure.html,,Configuration}
171 @item
172 @uref{build.html,,Building}
173 @item
174 @uref{test.html,,Testing} (optional)
175 @item
176 @uref{finalinstall.html,,Final install}
177 @end enumerate
178 @end ifhtml
179
180 Please note that GCC does not support @samp{make uninstall} and probably
181 won't do so in the near future as this would open a can of worms. Instead,
182 we suggest that you install GCC into a directory of its own and simply
183 remove that directory when you do not need that specific version of GCC
184 any longer, and, if shared libraries are installed there as well, no
185 more binaries exist that use them.
186
187 @ifhtml
188 There are also some @uref{old.html,,old installation instructions},
189 which are mostly obsolete but still contain some information which has
190 not yet been merged into the main part of this manual.
191 @end ifhtml
192
193 @html
194 <hr>
195 <p>
196 @end html
197 @ifhtml
198 @uref{./index.html,,Return to the GCC Installation page}
199
200 @copyrightnotice{}
201 @end ifhtml
202 @end ifset
203
204 @c ***Downloading the source**************************************************
205 @ifnothtml
206 @comment node-name, next, previous, up
207 @node Downloading the source, Configuration, , Installing GCC
208 @end ifnothtml
209 @ifset downloadhtml
210 @ifnothtml
211 @chapter Downloading GCC
212 @end ifnothtml
213 @cindex Downloading GCC
214 @cindex Downloading the Source
215
216 GCC is distributed via @uref{http://gcc.gnu.org/cvs.html,,CVS} and FTP
217 tarballs compressed with @command{gzip} or
218 @command{bzip2}. It is possible to download a full distribution or specific
219 components.
220
221 Please refer to our @uref{http://gcc.gnu.org/releases.html,,releases web page}
222 for information on how to obtain GCC@.
223
224 The full distribution includes the C, C++, Objective-C, Fortran, Java,
225 and Ada (in case of GCC 3.1 and later) compilers. The full distribution
226 also includes runtime libraries for C++, Objective-C, Fortran, and Java.
227 In GCC 3.0 and later versions, GNU compiler testsuites are also included
228 in the full distribution.
229
230 If you choose to download specific components, you must download the core
231 GCC distribution plus any language specific distributions you wish to
232 use. The core distribution includes the C language front end as well as the
233 shared components. Each language has a tarball which includes the language
234 front end as well as the language runtime (when appropriate).
235
236 Unpack the core distribution as well as any language specific
237 distributions in the same directory.
238
239 If you also intend to build binutils (either to upgrade an existing
240 installation or for use in place of the corresponding tools of your
241 OS), unpack the binutils distribution either in the same directory or
242 a separate one. In the latter case, add symbolic links to any
243 components of the binutils you intend to build alongside the compiler
244 (@file{bfd}, @file{binutils}, @file{gas}, @file{gprof}, @file{ld},
245 @file{opcodes}, @dots{}) to the directory containing the GCC sources.
246
247 @html
248 <hr>
249 <p>
250 @end html
251 @ifhtml
252 @uref{./index.html,,Return to the GCC Installation page}
253 @end ifhtml
254 @end ifset
255
256 @c ***Configuration***********************************************************
257 @ifnothtml
258 @comment node-name, next, previous, up
259 @node Configuration, Building, Downloading the source, Installing GCC
260 @end ifnothtml
261 @ifset configurehtml
262 @ifnothtml
263 @chapter Installing GCC: Configuration
264 @end ifnothtml
265 @cindex Configuration
266 @cindex Installing GCC: Configuration
267
268 Like most GNU software, GCC must be configured before it can be built.
269 This document describes the recommended configuration procedure
270 for both native and cross targets.
271
272 We use @var{srcdir} to refer to the toplevel source directory for
273 GCC; we use @var{objdir} to refer to the toplevel build/object directory.
274
275 If you obtained the sources via CVS, @var{srcdir} must refer to the top
276 @file{gcc} directory, the one where the @file{MAINTAINERS} can be found,
277 and not its @file{gcc} subdirectory, otherwise the build will fail.
278
279 If either @var{srcdir} or @var{objdir} is located on an automounted NFS
280 file system, the shell's built-in @command{pwd} command will return
281 temporary pathnames. Using these can lead to various sorts of build
282 problems. To avoid this issue, set the @env{PWDCMD} environment
283 variable to an automounter-aware @command{pwd} command, e.g.,
284 @command{pawd} or @command{amq -w}, during the configuration and build
285 phases.
286
287 First, in general, GCC @strong{must} be built into a separate directory
288 than the sources which does @strong{not} reside within the source tree.
289 This is how almost all developers build GCC; building where @var{srcdir}
290 == @var{objdir} is completely unsupported; building where @var{objdir}
291 is a subdirectory of @var{srcdir} is completely unsupported.
292
293 If you have previously built GCC in the same directory for a
294 different target machine, do @samp{make distclean} to delete all files
295 that might be invalid. One of the files this deletes is
296 @file{Makefile}; if @samp{make distclean} complains that @file{Makefile}
297 does not exist, it probably means that the directory is already suitably
298 clean. However, with the recommended method of building in a separate
299 @var{objdir}, you should simply use a different @var{objdir} for each
300 target.
301
302 Second, when configuring a native system, either @command{cc} or
303 @command{gcc} must be in your path or you must set @env{CC} in
304 your environment before running configure. Otherwise the configuration
305 scripts may fail.
306
307 Note that the bootstrap compiler and the resulting GCC must be link
308 compatible, else the bootstrap will fail with linker errors about
309 incompatible object file formats. Several multilibed targets are
310 affected by this requirement, see
311 @ifnothtml
312 @ref{Specific, host/target specific installation notes}.
313 @end ifnothtml
314 @ifhtml
315 @uref{specific.html,,host/target specific installation notes}.
316 @end ifhtml
317
318 To configure GCC:
319
320 @example
321 % mkdir @var{objdir}
322 % cd @var{objdir}
323 % @var{srcdir}/configure [@var{options}] [@var{target}]
324 @end example
325
326
327 @heading Target specification
328 @itemize @bullet
329 @item
330 GCC has code to correctly determine the correct value for @var{target}
331 for nearly all native systems. Therefore, we highly recommend you not
332 provide a configure target when configuring a native compiler.
333
334 @item
335 @var{target} must be specified as @option{--target=@var{target}}
336 when configuring a cross compiler; examples of valid targets would be
337 i960-rtems, m68k-coff, sh-elf, etc.
338
339 @item
340 Specifying just @var{target} instead of @option{--target=@var{target}}
341 implies that the host defaults to @var{target}.
342 @end itemize
343
344
345 @heading Options specification
346
347 Use @var{options} to override several configure time options for
348 GCC@. A list of supported @var{options} follows; @command{configure
349 --help} may list other options, but those not listed below may not
350 work and should not normally be used.
351
352 @table @code
353 @item --prefix=@var{dirname}
354 Specify the toplevel installation
355 directory. This is the recommended way to install the tools into a directory
356 other than the default. The toplevel installation directory defaults to
357 @file{/usr/local}.
358
359 We @strong{highly} recommend against @var{dirname} being the same or a
360 subdirectory of @var{objdir} or vice versa.
361
362 These additional options control where certain parts of the distribution
363 are installed. Normally you should not need to use these options.
364 @table @code
365
366 @item --exec-prefix=@var{dirname}
367 Specify the toplevel installation directory for architecture-dependent
368 files. The default is @file{@var{prefix}}.
369
370 @item --bindir=@var{dirname}
371 Specify the installation directory for the executables called by users
372 (such as @command{gcc} and @command{g++}). The default is
373 @file{@var{exec-prefix}/bin}.
374
375 @item --libdir=@var{dirname}
376 Specify the installation directory for object code libraries and
377 internal parts of GCC@. The default is @file{@var{exec-prefix}/lib}.
378
379 @item --with-slibdir=@var{dirname}
380 Specify the installation directory for the shared libgcc library. The
381 default is @file{@var{libdir}}.
382
383 @item --infodir=@var{dirname}
384 Specify the installation directory for documentation in info format.
385 The default is @file{@var{prefix}/info}.
386
387 @item --datadir=@var{dirname}
388 Specify the installation directory for some architecture-independent
389 data files referenced by GCC@. The default is @file{@var{prefix}/share}.
390
391 @item --mandir=@var{dirname}
392 Specify the installation directory for manual pages. The default is
393 @file{@var{prefix}/man}. (Note that the manual pages are only extracts from
394 the full GCC manuals, which are provided in Texinfo format. The
395 @command{g77} manpage is unmaintained and may be out of date; the others
396 are derived by an automatic conversion process from parts of the full
397 manual.)
398
399 @item --with-gxx-include-dir=@var{dirname}
400 Specify
401 the installation directory for G++ header files. The default is
402 @file{@var{prefix}/include/g++-v3}.
403
404 @end table
405
406 @item --program-prefix=@var{prefix}
407 GCC supports some transformations of the names of its programs when
408 installing them. This option prepends @var{prefix} to the names of
409 programs to install in @var{bindir} (see above). For example, specifying
410 @option{--program-prefix=foo-} would result in @samp{gcc}
411 being installed as @file{/usr/local/bin/foo-gcc}.
412
413 @item --program-suffix=@var{suffix}
414 Appends @var{suffix} to the names of programs to install in @var{bindir}
415 (see above). For example, specifying @option{--program-suffix=-3.1}
416 would result in @samp{gcc} being installed as
417 @file{/usr/local/bin/gcc-3.1}.
418
419 @item --program-transform-name=@var{pattern}
420 Applies the @samp{sed} script @var{pattern} to be applied to the names
421 of programs to install in @var{bindir} (see above). @var{pattern} has to
422 consist of one or more basic @samp{sed} editing commands, separated by
423 semicolons. For example, if you want the @samp{gcc} program name to be
424 transformed to the installed program @file{/usr/local/bin/myowngcc} and
425 the @samp{g++} program name to be transformed to
426 @file{/usr/local/bin/gspecial++} without changing other program names,
427 you could use the pattern
428 @option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'}
429 to achieve this effect.
430
431 All three options can be combined and used together, resulting in more
432 complex conversion patterns. As a basic rule, @var{prefix} (and
433 @var{suffix}) are prepended (appended) before further transformations
434 can happen with a special transformation script @var{pattern}.
435
436 As currently implemented, this options only take effect for native
437 builds; cross compiler binaries' names are not transformed even when a
438 transformation is explicitly asked for by one of this options.
439
440 For native builds, some of the installed programs are also installed
441 with the target alias in front of their name, as in
442 @samp{i686-pc-linux-gnu-gcc}. All of the above transformations happen
443 before the target alias is prepended to the name - so, specifying
444 @option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the
445 resulting binary would be installed as
446 @file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}.
447
448 As a last shortcoming, none of the installed Ada programs are
449 transformed yet, which will be fixed in some time.
450
451 @item --with-local-prefix=@var{dirname}
452 Specify the
453 installation directory for local include files. The default is
454 @file{/usr/local}. Specify this option if you want the compiler to
455 search directory @file{@var{dirname}/include} for locally installed
456 header files @emph{instead} of @file{/usr/local/include}.
457
458 You should specify @option{--with-local-prefix} @strong{only} if your
459 site has a different convention (not @file{/usr/local}) for where to put
460 site-specific files.
461
462 The default value for @option{--with-local-prefix} is @file{/usr/local}
463 regardless of the value of @option{--prefix}. Specifying
464 @option{--prefix} has no effect on which directory GCC searches for
465 local header files. This may seem counterintuitive, but actually it is
466 logical.
467
468 The purpose of @option{--prefix} is to specify where to @emph{install
469 GCC}. The local header files in @file{/usr/local/include}---if you put
470 any in that directory---are not part of GCC@. They are part of other
471 programs---perhaps many others. (GCC installs its own header files in
472 another directory which is based on the @option{--prefix} value.)
473
474 Both the local-prefix include directory and the GCC-prefix include
475 directory are part of GCC's "system include" directories. Although these
476 two directories are not fixed, they need to be searched in the proper
477 order for the correct processing of the include_next directive. The
478 local-prefix include directory is searched before the GCC-prefix
479 include directory. Another characteristic of system include directories
480 is that pedantic warnings are turned off for headers in these directories.
481
482 Some autoconf macros add @option{-I @var{directory}} options to the
483 compiler command line, to ensure that directories containing installed
484 packages' headers are searched. When @var{directory} is one of GCC's
485 system include directories, GCC will ignore the option so that system
486 directories continue to be processed in the correct order. This
487 may result in a search order different from what was specified but the
488 directory will still be searched.
489
490 GCC automatically searches for ordinary libraries using
491 @env{GCC_EXEC_PREFIX}. Thus, when the same installation prefix is
492 used for both GCC and packages, GCC will automatically search for
493 both headers and libraries. This provides a configuration that is
494 easy to use. GCC behaves in a manner similar to that when it is
495 installed as a system compiler in @file{/usr}.
496
497 Sites that need to install multiple versions of GCC may not want to
498 use the above simple configuration. It is possible to use the
499 @option{--program-prefix}, @option{--program-suffix} and
500 @option{--program-transform-name} options to install multiple versions
501 into a single directory, but it may be simpler to use different prefixes
502 and the @option{--with-local-prefix} option to specify the location of the
503 site-specific files for each version. It will then be necessary for
504 users to specify explicitly the location of local site libraries
505 (e.g., with @env{LIBRARY_PATH}).
506
507 The same value can be used for both @option{--with-local-prefix} and
508 @option{--prefix} provided it is not @file{/usr}. This can be used
509 to avoid the default search of @file{/usr/local/include}.
510
511 @strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}!
512 The directory you use for @option{--with-local-prefix} @strong{must not}
513 contain any of the system's standard header files. If it did contain
514 them, certain programs would be miscompiled (including GNU Emacs, on
515 certain targets), because this would override and nullify the header
516 file corrections made by the @code{fixincludes} script.
517
518 Indications are that people who use this option use it based on mistaken
519 ideas of what it is for. People use it as if it specified where to
520 install part of GCC@. Perhaps they make this assumption because
521 installing GCC creates the directory.
522
523 @item --enable-shared[=@var{package}[,@dots{}]]
524 Build shared versions of libraries, if shared libraries are supported on
525 the target platform. Unlike GCC 2.95.x and earlier, shared libraries
526 are enabled by default on all platforms that support shared libraries,
527 except for @samp{libobjc} which is built as a static library only by
528 default.
529
530 If a list of packages is given as an argument, build shared libraries
531 only for the listed packages. For other packages, only static libraries
532 will be built. Package names currently recognized in the GCC tree are
533 @samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not
534 @samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc} and
535 @samp{libjava}. Note that @samp{libobjc} does not recognize itself by
536 any name, so, if you list package names in @option{--enable-shared},
537 you will only get static Objective-C libraries. @samp{libf2c} and
538 @samp{libiberty} do not support shared libraries at all.
539
540 Use @option{--disable-shared} to build only static libraries. Note that
541 @option{--disable-shared} does not accept a list of package names as
542 argument, only @option{--enable-shared} does.
543
544 @item @anchor{with-gnu-as}--with-gnu-as
545 Specify that the compiler should assume that the
546 assembler it finds is the GNU assembler. However, this does not modify
547 the rules to find an assembler and will result in confusion if found
548 assembler is not actually the GNU assembler. (Confusion will also
549 result if the compiler finds the GNU assembler but has not been
550 configured with @option{--with-gnu-as}.) If you have more than one
551 assembler installed on your system, you may want to use this option in
552 connection with @option{--with-as=@var{pathname}}.
553
554 The systems where it makes a difference whether you use the GNU assembler are
555 @samp{hppa1.0-@var{any}-@var{any}}, @samp{hppa1.1-@var{any}-@var{any}},
556 @samp{i386-@var{any}-sysv}, @samp{i386-@var{any}-isc},
557 @samp{i860-@var{any}-bsd}, @samp{m68k-bull-sysv},
558 @samp{m68k-hp-hpux}, @samp{m68k-sony-bsd},
559 @samp{m68k-altos-sysv}, @samp{m68000-hp-hpux},
560 @samp{m68000-att-sysv}, @samp{@var{any}-lynx-lynxos},
561 and @samp{mips-@var{any}}.
562 On any other system, @option{--with-gnu-as} has no effect.
563
564 On the systems listed above (except for the HP-PA, for ISC on the
565 386, and for @samp{mips-sgi-irix5.*}), if you use the GNU assembler,
566 you should also use the GNU linker (and specify @option{--with-gnu-ld}).
567
568 @item --with-as=@var{pathname}
569 Specify that the
570 compiler should use the assembler pointed to by @var{pathname}, rather
571 than the one found by the standard rules to find an assembler, which
572 are:
573 @itemize @bullet
574 @item
575 Check the
576 @file{@var{exec_prefix}/lib/gcc-lib/@var{target}/@var{version}}
577 directory, where @var{exec_prefix} defaults to @var{prefix} which
578 defaults to @file{/usr/local} unless overridden by the
579 @option{--prefix=@var{pathname}} switch described above. @var{target} is the
580 target system triple, such as @samp{sparc-sun-solaris2.7}, and
581 @var{version} denotes the GCC version, such as 3.0.
582 @item
583 Check operating system specific directories (e.g.@: @file{/usr/ccs/bin} on
584 Sun Solaris 2).
585 @end itemize
586 Note that these rules do not check for the value of @env{PATH}. You may
587 want to use @option{--with-as} if no assembler is installed in the
588 directories listed above, or if you have multiple assemblers installed
589 and want to choose one that is not found by the above rules.
590
591 @item @anchor{with-gnu-ld}--with-gnu-ld
592 Same as @uref{#with-gnu-as,,@option{--with-gnu-as}}
593 but for linker.
594
595
596 @item --with-ld=@var{pathname}
597 Same as
598 @option{--with-as}, but for the linker.
599
600 @item --with-stabs
601 Specify that stabs debugging
602 information should be used instead of whatever format the host normally
603 uses. Normally GCC uses the same debug format as the host system.
604
605 On MIPS based systems and on Alphas, you must specify whether you want
606 GCC to create the normal ECOFF debugging format, or to use BSD-style
607 stabs passed through the ECOFF symbol table. The normal ECOFF debug
608 format cannot fully handle languages other than C@. BSD stabs format can
609 handle other languages, but it only works with the GNU debugger GDB@.
610
611 Normally, GCC uses the ECOFF debugging format by default; if you
612 prefer BSD stabs, specify @option{--with-stabs} when you configure GCC@.
613
614 No matter which default you choose when you configure GCC, the user
615 can use the @option{-gcoff} and @option{-gstabs+} options to specify explicitly
616 the debug format for a particular compilation.
617
618 @option{--with-stabs} is meaningful on the ISC system on the 386, also, if
619 @option{--with-gas} is used. It selects use of stabs debugging
620 information embedded in COFF output. This kind of debugging information
621 supports C++ well; ordinary COFF debugging information does not.
622
623 @option{--with-stabs} is also meaningful on 386 systems running SVR4. It
624 selects use of stabs debugging information embedded in ELF output. The
625 C++ compiler currently (2.6.0) does not support the DWARF debugging
626 information normally used on 386 SVR4 platforms; stabs provide a
627 workable alternative. This requires gas and gdb, as the normal SVR4
628 tools can not generate or interpret stabs.
629
630 @item --disable-multilib
631 Specify that multiple target
632 libraries to support different target variants, calling
633 conventions, etc should not be built. The default is to build a
634 predefined set of them.
635
636 Some targets provide finer-grained control over which multilibs are built
637 (e.g., @option{--disable-softfloat}):
638 @table @code
639
640 @item arc-*-elf*
641 biendian.
642
643 @item arm-*-*
644 fpu, 26bit, underscore, interwork, biendian, nofmult.
645
646 @item m68*-*-*
647 softfloat, m68881, m68000, m68020.
648
649 @item mips*-*-*
650 single-float, biendian, softfloat.
651
652 @item powerpc*-*-*, rs6000*-*-*
653 aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian,
654 sysv, aix.
655
656 @end table
657
658 @item --enable-threads
659 Specify that the target
660 supports threads. This affects the Objective-C compiler and runtime
661 library, and exception handling for other languages like C++ and Java.
662 On some systems, this is the default.
663
664 In general, the best (and, in many cases, the only known) threading
665 model available will be configured for use. Beware that on some
666 systems, gcc has not been taught what threading models are generally
667 available for the system. In this case, @option{--enable-threads} is an
668 alias for @option{--enable-threads=single}.
669
670 @item --disable-threads
671 Specify that threading support should be disabled for the system.
672 This is an alias for @option{--enable-threads=single}.
673
674 @item --enable-threads=@var{lib}
675 Specify that
676 @var{lib} is the thread support library. This affects the Objective-C
677 compiler and runtime library, and exception handling for other languages
678 like C++ and Java. The possibilities for @var{lib} are:
679
680 @table @code
681 @item aix
682 AIX thread support.
683 @item dce
684 DCE thread support.
685 @item mach
686 Generic MACH thread support, known to work on NeXTSTEP@. (Please note
687 that the file needed to support this configuration, @file{gthr-mach.h}, is
688 missing and thus this setting will cause a known bootstrap failure.)
689 @item no
690 This is an alias for @samp{single}.
691 @item posix
692 Generic POSIX thread support.
693 @item pthreads
694 Same as @samp{posix} on arm*-*-linux*, *-*-chorusos* and *-*-freebsd*
695 only. A future release of gcc might remove this alias or extend it
696 to all platforms.
697 @item rtems
698 RTEMS thread support.
699 @item single
700 Disable thread support, should work for all platforms.
701 @item solaris
702 Sun Solaris 2 thread support.
703 @item vxworks
704 VxWorks thread support.
705 @item win32
706 Microsoft Win32 API thread support.
707 @end table
708
709 @item --with-cpu=@var{cpu}
710 Specify which cpu variant the
711 compiler should generate code for by default. This is currently
712 only supported on the some ports, specifically arm, powerpc, and
713 SPARC@. If configure does not recognize the model name (e.g.@: arm700,
714 603e, or ultrasparc) you provide, please check the configure script
715 for a complete list of supported models.
716
717 @item --enable-altivec
718 Specify that the target supports AltiVec vector enhancements. This
719 option will adjust the ABI for AltiVec enhancements, as well as generate
720 AltiVec code when appropriate. This option is only available for
721 PowerPC systems.
722
723 @item --enable-target-optspace
724 Specify that target
725 libraries should be optimized for code space instead of code speed.
726 This is the default for the m32r platform.
727
728 @item --disable-cpp
729 Specify that a user visible @command{cpp} program should not be installed.
730
731 @item --with-cpp-install-dir=@var{dirname}
732 Specify that the user visible @command{cpp} program should be installed
733 in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}.
734
735 @item --enable-maintainer-mode
736 The build rules that
737 regenerate the GCC master message catalog @file{gcc.pot} are normally
738 disabled. This is because it can only be rebuilt if the complete source
739 tree is present. If you have changed the sources and want to rebuild the
740 catalog, configuring with @option{--enable-maintainer-mode} will enable
741 this. Note that you need a recent version of the @code{gettext} tools
742 to do so.
743
744 @item --enable-version-specific-runtime-libs
745 Specify
746 that runtime libraries should be installed in the compiler specific
747 subdirectory (@file{@var{libsubdir}}) rather than the usual places. In
748 addition, @samp{libstdc++}'s include files will be installed in
749 @file{@var{libsubdir}/include/g++} unless you overruled it by using
750 @option{--with-gxx-include-dir=@var{dirname}}. Using this option is
751 particularly useful if you intend to use several versions of GCC in
752 parallel. This is currently supported by @samp{libf2c} and
753 @samp{libstdc++}, and is the default for @samp{libobjc} which cannot be
754 changed in this case.
755
756 @item --enable-languages=@var{lang1},@var{lang2},@dots{}
757 Specify that only a particular subset of compilers and
758 their runtime libraries should be built. For a list of valid values for
759 @var{langN} you can issue the following command in the
760 @file{gcc} directory of your GCC source tree:@*
761 @example
762 grep language= */config-lang.in
763 @end example
764 Currently, you can use any of the following:
765 @code{ada}, @code{c}, @code{c++}, @code{f77}, @code{java}, @code{objc}.
766 Building the Ada compiler has special requirements, see below.@*
767 If you do not pass this flag, all languages available in the @file{gcc}
768 sub-tree will be configured. Re-defining @code{LANGUAGES} when calling
769 @samp{make bootstrap} @strong{does not} work anymore, as those
770 language sub-directories might not have been configured!
771
772 @item --disable-libgcj
773 Specify that the run-time libraries
774 used by GCJ should not be built. This is useful in case you intend
775 to use GCJ with some other run-time, or you're going to install it
776 separately, or it just happens not to build on your particular
777 machine. In general, if the Java front end is enabled, the GCJ
778 libraries will be enabled too, unless they're known to not work on
779 the target platform. If GCJ is enabled but @samp{libgcj} isn't built, you
780 may need to port it; in this case, before modifying the top-level
781 @file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
782 you may use @option{--enable-libgcj} to override the default.
783
784 @item --with-dwarf2
785 Specify that the compiler should
786 use DWARF 2 debugging information as the default.
787
788 @item --enable-win32-registry
789 @itemx --enable-win32-registry=@var{key}
790 @itemx --disable-win32-registry
791 The @option{--enable-win32-registry} option enables Windows-hosted GCC
792 to look up installations paths in the registry using the following key:
793
794 @smallexample
795 @code{HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\@var{key}}
796 @end smallexample
797
798 @var{key} defaults to GCC version number, and can be overridden by the
799 @option{--enable-win32-registry=@var{key}} option. Vendors and distributors
800 who use custom installers are encouraged to provide a different key,
801 perhaps one comprised of vendor name and GCC version number, to
802 avoid conflict with existing installations. This feature is enabled
803 by default, and can be disabled by @option{--disable-win32-registry}
804 option. This option has no effect on the other hosts.
805
806 @item --nfp
807 Specify that the machine does not have a floating point unit. This
808 option only applies to @samp{m68k-sun-sunos@var{n}} and
809 @samp{m68k-isi-bsd}. On any other system, @option{--nfp} has no effect.
810
811 @item --enable-checking
812 @itemx --enable-checking=@var{list}
813 When you specify this option, the compiler is built to perform checking
814 of tree node types when referencing fields of that node, and some other
815 internal consistency checks. This does not change the generated code,
816 but adds error checking within the compiler. This will slow down the
817 compiler and may only work properly if you are building the compiler
818 with GCC@. This is on by default when building from CVS or snapshots,
819 but off for releases. More control over the checks may be had by
820 specifying @var{list}; the categories of checks available are
821 @samp{misc}, @samp{tree}, @samp{gc}, @samp{rtl}, @samp{rtlflag} and
822 @samp{gcac}. The
823 default when @var{list} is not specified is @samp{misc,tree,gc,rtlflag}; the
824 checks @samp{rtl} and @samp{gcac} are very expensive.
825
826 @item --enable-coverage
827 @item --enable-coverage=@var{level}
828 With this option, the compiler is built to collect self coverage
829 information, every time it is run. This is for internal development
830 purposes, and only works when the compiler is being built with gcc. The
831 @var{level} argument controls whether the compiler is built optimized or
832 not, values are @samp{opt} and @samp{noopt}. For coverage analysis you
833 want to disable optimization, for performance analysis you want to
834 enable optimization. When coverage is enabled, the default level is
835 without optimization.
836
837 @item --enable-nls
838 @itemx --disable-nls
839 The @option{--enable-nls} option enables Native Language Support (NLS),
840 which lets GCC output diagnostics in languages other than American
841 English. Native Language Support is enabled by default if not doing a
842 canadian cross build. The @option{--disable-nls} option disables NLS@.
843
844 @item --with-included-gettext
845 If NLS is enabled, the @option{--with-included-gettext} option causes the build
846 procedure to prefer its copy of GNU @command{gettext}.
847
848 @item --with-catgets
849 If NLS is enabled, and if the host lacks @code{gettext} but has the
850 inferior @code{catgets} interface, the GCC build procedure normally
851 ignores @code{catgets} and instead uses GCC's copy of the GNU
852 @code{gettext} library. The @option{--with-catgets} option causes the
853 build procedure to use the host's @code{catgets} in this situation.
854
855 @item --with-libiconv-prefix=@var{dir}
856 Search for libiconv header files in @file{@var{dir}/include} and
857 libiconv library files in @file{@var{dir}/lib}.
858
859 @item --with-system-zlib
860 Use installed zlib rather than that included with GCC@. This option
861 only applies if the Java front end is being built.
862
863 @item --enable-obsolete
864 Enable configuration for an obsoleted system. If you attempt to
865 configure GCC for a system (build, host, or target) which has been
866 obsoleted, and you do not specify this flag, configure will halt with an
867 error message.
868
869 All support for systems which have been obsoleted in one release of GCC
870 is removed entirely in the next major release, unless someone steps
871 forward to maintain the port.
872 @end table
873
874 Some options which only apply to building cross compilers:
875 @table @code
876 @item --with-headers=@var{dir}
877 Specifies a directory
878 which has target include files.
879 @emph{This options is required} when building a cross
880 compiler, if @file{@var{prefix}/@var{target}/sys-include} doesn't pre-exist.
881 These include files will be copied into the @file{gcc} install directory.
882 Fixincludes will be run on these files to make them compatible with
883 GCC.
884 @item --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
885 Specifies a list of directories which contain the target runtime
886 libraries. These libraries will be copied into the @file{gcc} install
887 directory.
888 @item --with-newlib
889 Specifies that @samp{newlib} is
890 being used as the target C library. This causes @code{__eprintf} to be
891 omitted from @file{libgcc.a} on the assumption that it will be provided by
892 @samp{newlib}.
893 @end table
894
895 Note that each @option{--enable} option has a corresponding
896 @option{--disable} option and that each @option{--with} option has a
897 corresponding @option{--without} option.
898
899 @html
900 <hr>
901 <p>
902 @end html
903 @ifhtml
904 @uref{./index.html,,Return to the GCC Installation page}
905 @end ifhtml
906 @end ifset
907
908 @c ***Building****************************************************************
909 @ifnothtml
910 @comment node-name, next, previous, up
911 @node Building, Testing, Configuration, Installing GCC
912 @end ifnothtml
913 @ifset buildhtml
914 @ifnothtml
915 @chapter Building
916 @end ifnothtml
917 @cindex Installing GCC: Building
918
919 Now that GCC is configured, you are ready to build the compiler and
920 runtime libraries.
921
922 We @strong{highly} recommend that GCC be built using GNU make;
923 other versions may work, then again they might not.
924 GNU make is required for compiling GNAT (the Ada compiler) and the Java
925 runtime library.
926
927 (For example, many broken versions of make will fail if you use the
928 recommended setup where @var{objdir} is different from @var{srcdir}.
929 Other broken versions may recompile parts of the compiler when
930 installing the compiler.)
931
932 Some commands executed when making the compiler may fail (return a
933 nonzero status) and be ignored by @code{make}. These failures, which
934 are often due to files that were not found, are expected, and can safely
935 be ignored.
936
937 It is normal to have compiler warnings when compiling certain files.
938 Unless you are a GCC developer, you can generally ignore these warnings
939 unless they cause compilation to fail.
940
941 On certain old systems, defining certain environment variables such as
942 @env{CC} can interfere with the functioning of @command{make}.
943
944 If you encounter seemingly strange errors when trying to build the
945 compiler in a directory other than the source directory, it could be
946 because you have previously configured the compiler in the source
947 directory. Make sure you have done all the necessary preparations.
948
949 If you build GCC on a BSD system using a directory stored in an old System
950 V file system, problems may occur in running @code{fixincludes} if the
951 System V file system doesn't support symbolic links. These problems
952 result in a failure to fix the declaration of @code{size_t} in
953 @file{sys/types.h}. If you find that @code{size_t} is a signed type and
954 that type mismatches occur, this could be the cause.
955
956 The solution is not to use such a directory for building GCC@.
957
958 When building from CVS or snapshots, or if you modify parser sources,
959 you need the Bison parser generator installed. Any version 1.25 or
960 later should work; older versions may also work. If you do not modify
961 parser sources, releases contain the Bison-generated files and you do
962 not need Bison installed to build them.
963
964 When building from CVS or snapshots, or if you modify Texinfo
965 documentation, you need version 4.1 or later of Texinfo installed if you
966 want Info documentation to be regenerated. Releases contain Info
967 documentation pre-built for the unmodified documentation in the release.
968
969 @section Building a native compiler
970
971 For a native build issue the command @samp{make bootstrap}. This
972 will build the entire GCC system, which includes the following steps:
973
974 @itemize @bullet
975 @item
976 Build host tools necessary to build the compiler such as texinfo, bison,
977 gperf.
978
979 @item
980 Build target tools for use by the compiler such as binutils (bfd,
981 binutils, gas, gprof, ld, and opcodes)
982 if they have been individually linked
983 or moved into the top level GCC source tree before configuring.
984
985 @item
986 Perform a 3-stage bootstrap of the compiler.
987
988 @item
989 Perform a comparison test of the stage2 and stage3 compilers.
990
991 @item
992 Build runtime libraries using the stage3 compiler from the previous step.
993
994 @end itemize
995
996 If you are short on disk space you might consider @samp{make
997 bootstrap-lean} instead. This is identical to @samp{make
998 bootstrap} except that object files from the stage1 and
999 stage2 of the 3-stage bootstrap of the compiler are deleted as
1000 soon as they are no longer needed.
1001
1002
1003 If you want to save additional space during the bootstrap and in
1004 the final installation as well, you can build the compiler binaries
1005 without debugging information with @samp{make CFLAGS='-O' LIBCFLAGS='-g
1006 -O2' LIBCXXFLAGS='-g -O2 -fno-implicit-templates' bootstrap}. This will save
1007 roughly 40% of disk space both for the bootstrap and the final installation.
1008 (Libraries will still contain debugging information.)
1009
1010 If you wish to use non-default GCC flags when compiling the stage2 and
1011 stage3 compilers, set @code{BOOT_CFLAGS} on the command line when doing
1012 @samp{make bootstrap}. Non-default optimization flags are less well
1013 tested here than the default of @samp{-g -O2}, but should still work.
1014 In a few cases, you may find that you need to specify special flags such
1015 as @option{-msoft-float} here to complete the bootstrap; or, if the
1016 native compiler miscompiles the stage1 compiler, you may need to work
1017 around this, by choosing @code{BOOT_CFLAGS} to avoid the parts of the
1018 stage1 compiler that were miscompiled, or by using @samp{make
1019 bootstrap4} to increase the number of stages of bootstrap.
1020
1021 If you used the flag @option{--enable-languages=@dots{}} to restrict
1022 the compilers to be built, only those you've actually enabled will be
1023 built. This will of course only build those runtime libraries, for
1024 which the particular compiler has been built. Please note,
1025 that re-defining @env{LANGUAGES} when calling @samp{make bootstrap}
1026 @strong{does not} work anymore!
1027
1028 If the comparison of stage2 and stage3 fails, this normally indicates
1029 that the stage2 compiler has compiled GCC incorrectly, and is therefore
1030 a potentially serious bug which you should investigate and report. (On
1031 a few systems, meaningful comparison of object files is impossible; they
1032 always appear ``different''. If you encounter this problem, you will
1033 need to disable comparison in the @file{Makefile}.)
1034
1035 @section Building a cross compiler
1036
1037 We recommend reading the
1038 @uref{http://www.objsw.com/CrossGCC/,,crossgcc FAQ}
1039 for information about building cross compilers.
1040
1041 When building a cross compiler, it is not generally possible to do a
1042 3-stage bootstrap of the compiler. This makes for an interesting problem
1043 as parts of GCC can only be built with GCC@.
1044
1045 To build a cross compiler, we first recommend building and installing a
1046 native compiler. You can then use the native GCC compiler to build the
1047 cross compiler. The installed native compiler needs to be GCC version
1048 2.95 or later.
1049
1050 Assuming you have already installed a native copy of GCC and configured
1051 your cross compiler, issue the command @command{make}, which performs the
1052 following steps:
1053
1054 @itemize @bullet
1055 @item
1056 Build host tools necessary to build the compiler such as texinfo, bison,
1057 gperf.
1058
1059 @item
1060 Build target tools for use by the compiler such as binutils (bfd,
1061 binutils, gas, gprof, ld, and opcodes)
1062 if they have been individually linked or moved into the top level GCC source
1063 tree before configuring.
1064
1065 @item
1066 Build the compiler (single stage only).
1067
1068 @item
1069 Build runtime libraries using the compiler from the previous step.
1070 @end itemize
1071
1072 Note that if an error occurs in any step the make process will exit.
1073
1074 @section Building in parallel
1075
1076 If you have a multiprocessor system you can use @samp{make bootstrap
1077 MAKE="make -j 2" -j 2} or just @samp{make -j 2 bootstrap}
1078 for GNU Make 3.79 and above instead of just @samp{make bootstrap}
1079 when building GCC@. You can use a bigger number instead of two if
1080 you like. In most cases, it won't help to use a number bigger than
1081 the number of processors in your machine.
1082
1083 @section Building the Ada compiler
1084
1085 In order to build GNAT, the Ada compiler, you need a working GNAT
1086 compiler (GNAT version 3.13 or later, or GCC version 3.1 or later),
1087 since the Ada front end is written in Ada (with some
1088 GNAT-specific extensions), and GNU make.
1089
1090 However, you do not need a full installation of GNAT, just the GNAT
1091 binary @file{gnat1}, a copy of @file{gnatbind}, and a compiler driver
1092 which can deal with Ada input (by invoking the @file{gnat1} binary).
1093 You can specify this compiler driver by setting the @env{ADAC}
1094 environment variable at the configure step. @command{configure} can
1095 detect the driver automatically if it has got a common name such as
1096 @command{gcc} or @command{gnatgcc}. Of course, you still need a working
1097 C compiler (the compiler driver can be different or not).
1098 @command{configure} does not test whether the GNAT installation works
1099 and has a sufficiently recent version; if too old a GNAT version is
1100 installed, the build will fail unless @option{--enable-languages} is
1101 used to disable building the Ada front end.
1102
1103 Additional build tools (such as @command{gnatmake}) or a working GNAT
1104 run-time library installation are usually @emph{not} required. However,
1105 if you want to boostrap the compiler using a minimal version of GNAT,
1106 you have to issue the following commands before invoking @samp{make
1107 boostrap} (this assumes that you start with an unmodified and consistent
1108 source distribution):
1109
1110 @example
1111 cd @var{srcdir}/gcc/ada
1112 touch treeprs.ads [es]info.h nmake.ad[bs]
1113 @end example
1114
1115 At the moment, the GNAT library and several tools for GNAT are not built
1116 by @samp{make bootstrap}. You have to invoke
1117 @samp{make gnatlib_and_tools} in the @file{@var{objdir}/gcc}
1118 subdirectory before proceeding with the next steps.
1119
1120 For example, you can build a native Ada compiler by issuing the
1121 following commands (assuming @command{make} is GNU make):
1122
1123 @example
1124 cd @var{objdir}
1125 @var{srcdir}/configure --enable-languages=c,ada
1126 cd @var{srcdir}/gcc/ada
1127 touch treeprs.ads [es]info.h nmake.ad[bs]
1128 cd @var{objdir}
1129 make bootstrap
1130 cd gcc
1131 make gnatlib_and_tools
1132 cd ..
1133 @end example
1134
1135 Currently, when compiling the Ada front end, you cannot use the parallel
1136 build feature described in the previous section.
1137
1138 @html
1139 <hr>
1140 <p>
1141 @end html
1142 @ifhtml
1143 @uref{./index.html,,Return to the GCC Installation page}
1144 @end ifhtml
1145 @end ifset
1146
1147 @c ***Testing*****************************************************************
1148 @ifnothtml
1149 @comment node-name, next, previous, up
1150 @node Testing, Final install, Building, Installing GCC
1151 @end ifnothtml
1152 @ifset testhtml
1153 @ifnothtml
1154 @chapter Installing GCC: Testing
1155 @end ifnothtml
1156 @cindex Testing
1157 @cindex Installing GCC: Testing
1158 @cindex Testsuite
1159
1160 Before you install GCC, we encourage you to run the testsuites and to
1161 compare your results with results from a similar configuration that have
1162 been submitted to the
1163 @uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}.
1164 This step is optional and may require you to download additional software,
1165 but it can give you confidence in your new GCC installation or point out
1166 problems before you install and start using your new GCC.
1167
1168 First, you must have @uref{download.html,,downloaded the testsuites}.
1169 These are part of the full distribution, but if you downloaded the
1170 ``core'' compiler plus any front ends, you must download the testsuites
1171 separately.
1172
1173 Second, you must have the testing tools installed. This includes
1174 a @uref{http://www.gnu.org/software/dejagnu/,,current version of DejaGnu};
1175 dejagnu 1.3 is not sufficient.
1176 It also includes Tcl and Expect; the DejaGnu site has links to these.
1177
1178 Now you may need specific preparations:
1179
1180 @itemize @bullet
1181
1182 @item
1183 The following environment variables may need to be set appropriately, as in
1184 the following example (which assumes that DejaGnu has been installed
1185 under @file{/usr/local}):
1186
1187 @example
1188 TCL_LIBRARY = /usr/local/share/tcl8.0
1189 DEJAGNULIBS = /usr/local/share/dejagnu
1190 @end example
1191
1192 On systems such as Cygwin, these paths are required to be actual
1193 paths, not mounts or links; presumably this is due to some lack of
1194 portability in the DejaGnu code.
1195
1196 If the directories where @command{runtest} and @command{expect} were
1197 installed are in the @env{PATH}, it should not be necessary to set these
1198 environment variables.
1199
1200 @end itemize
1201
1202 Finally, you can run the testsuite (which may take a long time):
1203 @example
1204 cd @var{objdir}; make -k check
1205 @end example
1206
1207 The testing process will try to test as many components in the GCC
1208 distribution as possible, including the C, C++, Objective-C and Fortran
1209 compilers as well as the C++ and Java runtime libraries.
1210
1211 While running the testsuite, DejaGnu might emit messages resembling
1212 @samp{WARNING: Couldn't find the global config file.} or
1213 @samp{WARNING: Couldn't find tool init file}.
1214 These messages are harmless and do not affect the validity of the tests.
1215
1216 @section How can I run the test suite on selected tests?
1217
1218 As a first possibility to cut down the number of tests that are run it is
1219 possible to use @samp{make check-gcc} or @samp{make check-g++}
1220 in the @file{gcc} subdirectory of the object directory. To further cut down the
1221 tests the following is possible:
1222
1223 @example
1224 make check-gcc RUNTESTFLAGS="execute.exp @var{other-options}"
1225 @end example
1226
1227 This will run all @command{gcc} execute tests in the testsuite.
1228
1229 @example
1230 make check-g++ RUNTESTFLAGS="old-deja.exp=9805* @var{other-options}"
1231 @end example
1232
1233 This will run the @command{g++} ``old-deja'' tests in the testsuite where the filename
1234 matches @samp{9805*}.
1235
1236 The @file{*.exp} files are located in the testsuite directories of the GCC
1237 source, the most important ones being @file{compile.exp},
1238 @file{execute.exp}, @file{dg.exp} and @file{old-deja.exp}.
1239 To get a list of the possible @file{*.exp} files, pipe the
1240 output of @samp{make check} into a file and look at the
1241 @samp{Running @dots{} .exp} lines.
1242
1243 @section How to interpret test results
1244
1245 After the testsuite has run you'll find various @file{*.sum} and @file{*.log}
1246 files in the testsuite subdirectories. The @file{*.log} files contain a
1247 detailed log of the compiler invocations and the corresponding
1248 results, the @file{*.sum} files summarize the results. These summaries list
1249 all the tests that have been run with a corresponding status code:
1250
1251 @itemize @bullet
1252 @item
1253 PASS: the test passed as expected
1254 @item
1255 XPASS: the test unexpectedly passed
1256 @item
1257 FAIL: the test unexpectedly failed
1258 @item
1259 XFAIL: the test failed as expected
1260 @item
1261 UNSUPPORTED: the test is not supported on this platform
1262 @item
1263 ERROR: the testsuite detected an error
1264 @item
1265 WARNING: the testsuite detected a possible problem
1266 @end itemize
1267
1268 It is normal for some tests to report unexpected failures. At the
1269 current time our testing harness does not allow fine grained control
1270 over whether or not a test is expected to fail. We expect to fix this
1271 problem in future releases.
1272
1273
1274 @section Submitting test results
1275
1276 If you want to report the results to the GCC project, use the
1277 @file{contrib/test_summary} shell script. Start it in the @var{objdir} with
1278
1279 @example
1280 @var{srcdir}/contrib/test_summary -p your_commentary.txt \
1281 -m gcc-testresults@@gcc.gnu.org |sh
1282 @end example
1283
1284 This script uses the @command{Mail} program to send the results, so
1285 make sure it is in your @env{PATH}. The file @file{your_commentary.txt} is
1286 prepended to the testsuite summary and should contain any special
1287 remarks you have on your results or your build environment. Please
1288 do not edit the testsuite result block or the subject line, as these
1289 messages are automatically parsed and presented at the
1290 @uref{http://gcc.gnu.org/testresults/,,GCC testresults} web
1291 page. Here you can also gather information on how specific tests
1292 behave on different platforms and compare them with your results. A
1293 few failing testcases are possible even on released versions and you
1294 should look here first if you think your results are unreasonable.
1295
1296 @html
1297 <hr>
1298 <p>
1299 @end html
1300 @ifhtml
1301 @uref{./index.html,,Return to the GCC Installation page}
1302 @end ifhtml
1303 @end ifset
1304
1305 @c ***Final install***********************************************************
1306 @ifnothtml
1307 @comment node-name, next, previous, up
1308 @node Final install, , Testing, Installing GCC
1309 @end ifnothtml
1310 @ifset finalinstallhtml
1311 @ifnothtml
1312 @chapter Installing GCC: Final installation
1313 @end ifnothtml
1314
1315 Now that GCC has been built (and optionally tested), you can install it with
1316 @example
1317 cd @var{objdir}; make install
1318 @end example
1319
1320 We strongly recommend to install into a target directory where there is
1321 no previous version of GCC present.
1322
1323 That step completes the installation of GCC; user level binaries can
1324 be found in @file{@var{prefix}/bin} where @var{prefix} is the value you
1325 specified with the @option{--prefix} to configure (or @file{/usr/local}
1326 by default). (If you specified @option{--bindir}, that directory will
1327 be used instead; otherwise, if you specified @option{--exec-prefix},
1328 @file{@var{exec-prefix}/bin} will be used.) Headers for the C++ and
1329 Java libraries are installed in @file{@var{prefix}/include}; libraries
1330 in @file{@var{libdir}} (normally @file{@var{prefix}/lib}); internal
1331 parts of the compiler in @file{@var{libdir}/gcc-lib}; documentation in
1332 info format in @file{@var{infodir}} (normally @file{@var{prefix}/info}).
1333
1334 If you built a released version of GCC using @samp{make bootstrap} then please
1335 quickly review the build status page for your release, available from
1336 @uref{http://gcc.gnu.org/buildstat.html}.
1337 If your system is not listed for the version of GCC that you built,
1338 send a note to
1339 @email{gcc@@gcc.gnu.org} indicating
1340 that you successfully built and installed GCC.
1341 Include the following information:
1342
1343 @itemize @bullet
1344 @item
1345 Output from running @file{@var{srcdir}/config.guess}. Do not send us
1346 that file itself, just the one-line output from running it.
1347
1348 @item
1349 The output of @samp{gcc -v} for your newly installed gcc.
1350 This tells us which version of GCC you built and the options you passed to
1351 configure.
1352
1353 @item
1354 Whether you enabled all languages or a subset of them. If you used a
1355 full distribution then this information is part of the configure
1356 options in the output of @samp{gcc -v}, but if you downloaded the
1357 ``core'' compiler plus additional front ends then it isn't apparent
1358 which ones you built unless you tell us about it.
1359
1360 @item
1361 If the build was for GNU/Linux, also include:
1362 @itemize @bullet
1363 @item
1364 The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3);
1365 this information should be available from @file{/etc/issue}.
1366
1367 @item
1368 The version of the Linux kernel, available from @samp{uname --version}
1369 or @samp{uname -a}.
1370
1371 @item
1372 The version of glibc you used; for RPM-based systems like Red Hat,
1373 Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version,
1374 and on systems like Debian and Progeny use @samp{dpkg -l libc6}.
1375 @end itemize
1376 For other systems, you can include similar information if you think it is
1377 relevant.
1378
1379 @item
1380 Any other information that you think would be useful to people building
1381 GCC on the same configuration. The new entry in the build status list
1382 will include a link to the archived copy of your message.
1383 @end itemize
1384
1385 We'd also like to know if the
1386 @ifnothtml
1387 @ref{Specific, host/target specific installation notes}
1388 @end ifnothtml
1389 @ifhtml
1390 @uref{specific.html,,host/target specific installation notes}
1391 @end ifhtml
1392 didn't include your host/target information or if that information is
1393 incomplete or out of date. Send a note to
1394 @email{gcc@@gcc.gnu.org} telling us how the information should be changed.
1395
1396 If you find a bug, please report it following our
1397 @uref{../bugs.html,,bug reporting guidelines}.
1398
1399 If you want to print the GCC manuals, do @samp{cd @var{objdir}; make
1400 dvi}. You will need to have @command{texi2dvi} (version at least 4.1)
1401 and @TeX{} installed. This creates a number of @file{.dvi} files in
1402 subdirectories of @file{@var{objdir}}; these may be converted for
1403 printing with programs such as @command{dvips}. You can also
1404 @uref{http://www.gnu.org/order/order.html,,buy printed manuals from the
1405 Free Software Foundation}, though such manuals may not be for the most
1406 recent version of GCC@.
1407
1408 @html
1409 <hr>
1410 <p>
1411 @end html
1412 @ifhtml
1413 @uref{./index.html,,Return to the GCC Installation page}
1414 @end ifhtml
1415 @end ifset
1416
1417 @c ***Binaries****************************************************************
1418 @ifnothtml
1419 @comment node-name, next, previous, up
1420 @node Binaries, Specific, Installing GCC, Top
1421 @end ifnothtml
1422 @ifset binarieshtml
1423 @ifnothtml
1424 @chapter Installing GCC: Binaries
1425 @end ifnothtml
1426 @cindex Binaries
1427 @cindex Installing GCC: Binaries
1428
1429 We are often asked about pre-compiled versions of GCC@. While we cannot
1430 provide these for all platforms, below you'll find links to binaries for
1431 various platforms where creating them by yourself is not easy due to various
1432 reasons.
1433
1434 Please note that we did not create these binaries, nor do we
1435 support them. If you have any problems installing them, please
1436 contact their makers.
1437
1438 @itemize
1439 @item
1440 AIX:
1441 @itemize
1442 @item
1443 @uref{http://www.bullfreeware.com,,Bull's Freeware and Shareware Archive for AIX};
1444
1445 @item
1446 @uref{http://aixpdslib.seas.ucla.edu,,UCLA Software Library for AIX}.
1447 @end itemize
1448
1449 @item
1450 DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}.
1451
1452 @item
1453 Hitachi H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
1454 Development Tools for the Hitachi H8/300[HS] Series}.
1455
1456 @item
1457 HP-UX:
1458 @itemize
1459 @item
1460 @uref{http://hpux.cae.wisc.edu/,,HP-UX Porting Center};
1461
1462 @item
1463 @uref{ftp://sunsite.informatik.rwth-aachen.de/pub/packages/gcc_hpux/,,Binaries for HP-UX 11.00 at Aachen University of Technology}.
1464 @end itemize
1465
1466 @item
1467 @uref{http://www.sco.com/skunkware/devtools/index.html#gcc,,SCO
1468 OpenServer/Unixware}.
1469
1470 @item
1471 Sinix/Reliant Unix---@uref{ftp://ftp.siemens.de/sni/mr/pd/gnu/gcc,,Siemens}.
1472
1473 @item
1474 Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware}.
1475
1476 @item
1477 SGI---@uref{http://freeware.sgi.com/,,SGI Freeware}.
1478
1479 @item
1480 Windows 95, 98, and NT:
1481 @itemize
1482 @item
1483 The @uref{http://sources.redhat.com/cygwin/,,Cygwin} project;
1484 @item
1485 The @uref{http://www.mingw.org/,,MinGW} project.
1486 @end itemize
1487
1488 @item
1489 @uref{ftp://ftp.thewrittenword.com/packages/free/by-name/,,The
1490 Written Word} offers binaries for Solaris 2.5.1, 2.6, 2.7/SPARC, 2.7/Intel,
1491 IRIX 6.2, 6.5, Digital UNIX 4.0D, HP-UX 10.20, and HP-UX 11.00.
1492
1493 @end itemize
1494
1495 In addition to those specific offerings, you can get a binary
1496 distribution CD-ROM from the
1497 @uref{http://www.fsf.org/order/order.html,,Free Software Foundation}.
1498 It contains binaries for a number of platforms, and
1499 includes not only GCC, but other stuff as well. The current CD does
1500 not contain the latest version of GCC, but it should allow
1501 bootstrapping the compiler. An updated version of that disk is in the
1502 works.
1503
1504 @html
1505 <hr>
1506 <p>
1507 @end html
1508 @ifhtml
1509 @uref{./index.html,,Return to the GCC Installation page}
1510 @end ifhtml
1511 @end ifset
1512
1513 @c ***Specific****************************************************************
1514 @ifnothtml
1515 @comment node-name, next, previous, up
1516 @node Specific, Old, Binaries, Top
1517 @end ifnothtml
1518 @ifset specifichtml
1519 @ifnothtml
1520 @chapter Host/target specific installation notes for GCC
1521 @end ifnothtml
1522 @cindex Specific
1523 @cindex Specific installation notes
1524 @cindex Target specific installation
1525 @cindex Host specific installation
1526 @cindex Target specific installation notes
1527
1528 Please read this document carefully @emph{before} installing the
1529 GNU Compiler Collection on your machine.
1530
1531 @ifhtml
1532 @itemize
1533 @item
1534 @uref{#alpha*-*-*,,alpha*-*-*}
1535 @item
1536 @uref{#alpha*-dec-osf*,,alpha*-dec-osf*}
1537 @item
1538 @uref{#alphaev5-cray-unicosmk*,,alphaev5-cray-unicosmk*}
1539 @item
1540 @uref{#arc-*-elf,,arc-*-elf}
1541 @item
1542 @uref{#arm-*-aout,,arm-*-aout}
1543 @item
1544 @uref{#arm-*-elf,,arm-*-elf}
1545 @item
1546 @uref{#arm*-*-linux-gnu,,arm*-*-linux-gnu}
1547 @item
1548 @uref{#avr,,avr}
1549 @item
1550 @uref{#c4x,,c4x}
1551 @item
1552 @uref{#dos,,DOS}
1553 @item
1554 @uref{#dsp16xx,,dsp16xx}
1555 @item
1556 @uref{#*-*-freebsd*,,*-*-freebsd*}
1557 @item
1558 @uref{#h8300-hms,,h8300-hms}
1559 @item
1560 @uref{#hppa*-hp-hpux*,,hppa*-hp-hpux*}
1561 @item
1562 @uref{#hppa*-hp-hpux9,,hppa*-hp-hpux9}
1563 @item
1564 @uref{#hppa*-hp-hpux10,,hppa*-hp-hpux10}
1565 @item
1566 @uref{#hppa*-hp-hpux11,,hppa*-hp-hpux11}
1567 @item
1568 @uref{#i370-*-*,,i370-*-*}
1569 @item
1570 @uref{#*-*-linux-gnu,,*-*-linux-gnu}
1571 @item
1572 @uref{#ix86-*-linux*aout,,i?86-*-linux*aout}
1573 @item
1574 @uref{#ix86-*-linux*,,i?86-*-linux*}
1575 @item
1576 @uref{#ix86-*-sco,,i?86-*-sco}
1577 @item
1578 @uref{#ix86-*-sco3.2v4,,i?86-*-sco3.2v4}
1579 @item
1580 @uref{#ix86-*-sco3.2v5*,,i?86-*-sco3.2v5*}
1581 @item
1582 @uref{#ix86-*-udk,,i?86-*-udk}
1583 @item
1584 @uref{#ix86-*-esix,,i?86-*-esix}
1585 @item
1586 @uref{#ia64-*-linux,,ia64-*-linux}
1587 @item
1588 @uref{#*-lynx-lynxos,,*-lynx-lynxos}
1589 @item
1590 @uref{#*-ibm-aix*,,*-ibm-aix*}
1591 @item
1592 @uref{#ip2k-*-elf,,ip2k-*-elf}
1593 @item
1594 @uref{#m32r-*-elf,,m32r-*-elf}
1595 @item
1596 @uref{#m68000-hp-bsd,,m68000-hp-bsd}
1597 @item
1598 @uref{#m6811-elf,,m6811-elf}
1599 @item
1600 @uref{#m6812-elf,,m6812-elf}
1601 @item
1602 @uref{#m68k-att-sysv,,m68k-att-sysv}
1603 @item
1604 @uref{#m68k-crds-unos,,m68k-crds-unos}
1605 @item
1606 @uref{#m68k-hp-hpux,,m68k-hp-hpux}
1607 @item
1608 @uref{#m68k-ncr-*,,m68k-ncr-*}
1609 @item
1610 @uref{#m68k-sun,,m68k-sun}
1611 @item
1612 @uref{#m68k-sun-sunos4.1.1,,m68k-sun-sunos4.1.1}
1613 @item
1614 @uref{#mips-*-*,,mips-*-*}
1615 @item
1616 @uref{#mips-sgi-irix5,,mips-sgi-irix5}
1617 @item
1618 @uref{#mips-sgi-irix6,,mips-sgi-irix6}
1619 @item
1620 @uref{#powerpc*-*-*,,powerpc*-*-*, powerpc-*-sysv4}
1621 @item
1622 @uref{#powerpc-*-darwin*,,powerpc-*-darwin*}
1623 @item
1624 @uref{#powerpc-*-elf,,powerpc-*-elf, powerpc-*-sysv4}
1625 @item
1626 @uref{#powerpc-*-linux-gnu*,,powerpc-*-linux-gnu*}
1627 @item
1628 @uref{#powerpc-*-netbsd*,,powerpc-*-netbsd*}
1629 @item
1630 @uref{#powerpc-*-eabiaix,,powerpc-*-eabiaix}
1631 @item
1632 @uref{#powerpc-*-eabisim,,powerpc-*-eabisim}
1633 @item
1634 @uref{#powerpc-*-eabi,,powerpc-*-eabi}
1635 @item
1636 @uref{#powerpcle-*-elf,,powerpcle-*-elf, powerpcle-*-sysv4}
1637 @item
1638 @uref{#powerpcle-*-eabisim,,powerpcle-*-eabisim}
1639 @item
1640 @uref{#powerpcle-*-eabi,,powerpcle-*-eabi}
1641 @item
1642 @uref{#powerpcle-*-winnt,,powerpcle-*-winnt, powerpcle-*-pe}
1643 @item
1644 @uref{#s390-*-linux*}
1645 @item
1646 @uref{#s390x-*-linux*}
1647 @item
1648 @uref{#*-*-solaris2*,,*-*-solaris2*}
1649 @item
1650 @uref{#sparc-sun-solaris2*,,sparc-sun-solaris2*}
1651 @item
1652 @uref{#sparc-sun-solaris2.7,,sparc-sun-solaris2.7}
1653 @item
1654 @uref{#sparc-sun-sunos4*,,sparc-sun-sunos4*}
1655 @item
1656 @uref{#sparc-unknown-linux-gnulibc1,,sparc-unknown-linux-gnulibc1}
1657 @item
1658 @uref{#sparc-*-linux*,,sparc-*-linux*}
1659 @item
1660 @uref{#sparc64-*-*,,sparc64-*-*}
1661 @item
1662 @uref{#sparcv9-*-solaris2*,,sparcv9-*-solaris2*}
1663 @item
1664 @uref{#*-*-sysv*,,*-*-sysv*}
1665 @item
1666 @uref{#vax-dec-ultrix,,vax-dec-ultrix}
1667 @item
1668 @uref{#xtensa-*-elf,,xtensa-*-elf}
1669 @item
1670 @uref{#xtensa-*-linux*,,xtensa-*-linux*}
1671 @item
1672 @uref{#windows,,Microsoft Windows}
1673 @item
1674 @uref{#os2,,OS/2}
1675 @item
1676 @uref{#older,,Older systems}
1677 @end itemize
1678
1679 @itemize
1680 @item
1681 @uref{#elf_targets,,all ELF targets} (SVR4, Solaris 2, etc.)
1682 @end itemize
1683 @end ifhtml
1684
1685
1686 @html
1687 <!-- -------- host/target specific issues start here ---------------- -->
1688 <hr>
1689 @end html
1690 @heading @anchor{alpha*-*-*}alpha*-*-*
1691
1692 This section contains general configuration information for all
1693 alpha-based platforms using ELF (in particular, ignore this section for
1694 DEC OSF/1, Digital UNIX and Tru64 UNIX)@. In addition to reading this
1695 section, please read all other sections that match your target.
1696
1697 We require binutils 2.11.2 or newer.
1698 Previous binutils releases had a number of problems with DWARF 2
1699 debugging information, not the least of which is incorrect linking of
1700 shared libraries.
1701
1702 @html
1703 </p>
1704 <hr>
1705 @end html
1706 @heading @anchor{alpha*-dec-osf*}alpha*-dec-osf*
1707 Systems using processors that implement the DEC Alpha architecture and
1708 are running the DEC/Compaq Unix (DEC OSF/1, Digital UNIX, or Compaq
1709 Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
1710
1711 As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
1712 supported. (These are the versions which identify themselves as DEC
1713 OSF/1.)
1714
1715 In Tru64 UNIX V5.1, Compaq introduced a new assembler that does not
1716 currently (2001-06-13) work with @command{mips-tfile}. As a workaround,
1717 we need to use the old assembler, invoked via the barely documented
1718 @option{-oldas} option. To bootstrap GCC, you either need to use the
1719 Compaq C Compiler:
1720
1721 @example
1722 % CC=cc @var{srcdir}/configure [@var{options}] [@var{target}]
1723 @end example
1724
1725 or you can use a copy of GCC 2.95.3 or higher built on Tru64 UNIX V4.0:
1726
1727 @example
1728 % CC=gcc -Wa,-oldas @var{srcdir}/configure [@var{options}] [@var{target}]
1729 @end example
1730
1731 As of GNU binutils 2.11.2, neither GNU @command{as} nor GNU @command{ld}
1732 are supported on Tru64 UNIX, so you must not configure GCC with
1733 @option{--with-gnu-as} or @option{--with-gnu-ld}.
1734
1735 The @option{--enable-threads} options isn't supported yet. A patch is
1736 in preparation for a future release.
1737
1738 GCC writes a @samp{.verstamp} directive to the assembler output file
1739 unless it is built as a cross-compiler. It gets the version to use from
1740 the system header file @file{/usr/include/stamp.h}. If you install a
1741 new version of DEC Unix, you should rebuild GCC to pick up the new version
1742 stamp.
1743
1744 Note that since the Alpha is a 64-bit architecture, cross-compilers from
1745 32-bit machines will not generate code as efficient as that generated
1746 when the compiler is running on a 64-bit machine because many
1747 optimizations that depend on being able to represent a word on the
1748 target in an integral value on the host cannot be performed. Building
1749 cross-compilers on the Alpha for 32-bit machines has only been tested in
1750 a few cases and may not work properly.
1751
1752 @code{make compare} may fail on old versions of DEC Unix unless you add
1753 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
1754 assembler input file is stored in the object file, and that makes
1755 comparison fail if it differs between the @code{stage1} and
1756 @code{stage2} compilations. The option @option{-save-temps} forces a
1757 fixed name to be used for the assembler input file, instead of a
1758 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
1759 unless the comparisons fail without that option. If you add
1760 @option{-save-temps}, you will have to manually delete the @samp{.i} and
1761 @samp{.s} files after each series of compilations.
1762
1763 GCC now supports both the native (ECOFF) debugging format used by DBX
1764 and GDB and an encapsulated STABS format for use only with GDB@. See the
1765 discussion of the @option{--with-stabs} option of @file{configure} above
1766 for more information on these formats and how to select them.
1767
1768 There is a bug in DEC's assembler that produces incorrect line numbers
1769 for ECOFF format when the @samp{.align} directive is used. To work
1770 around this problem, GCC will not emit such alignment directives
1771 while writing ECOFF format debugging information even if optimization is
1772 being performed. Unfortunately, this has the very undesirable
1773 side-effect that code addresses when @option{-O} is specified are
1774 different depending on whether or not @option{-g} is also specified.
1775
1776 To avoid this behavior, specify @option{-gstabs+} and use GDB instead of
1777 DBX@. DEC is now aware of this problem with the assembler and hopes to
1778 provide a fix shortly.
1779
1780 @html
1781 </p>
1782 <hr>
1783 @end html
1784 @heading @anchor{alphaev5-cray-unicosmk*}alphaev5-cray-unicosmk*
1785 Cray T3E systems running Unicos/Mk.
1786
1787 This port is incomplete and has many known bugs. We hope to improve the
1788 support for this target soon. Currently, only the C front end is supported,
1789 and it is not possible to build parallel applications. Cray modules are not
1790 supported; in particular, Craylibs are assumed to be in
1791 @file{/opt/ctl/craylibs/craylibs}.
1792
1793 You absolutely @strong{must} use GNU make on this platform. Also, you
1794 need to tell GCC where to find the assembler and the linker. The
1795 simplest way to do so is by providing @option{--with-as} and
1796 @option{--with-ld} to @file{configure}, e.g.@:
1797
1798 @samp{configure --with-as=/opt/ctl/bin/cam --with-ld=/opt/ctl/bin/cld
1799 --enable-languages=c}
1800
1801 The comparison test during @samp{make bootstrap} fails on Unicos/Mk
1802 because the assembler inserts timestamps into object files. You should
1803 be able to work around this by doing @samp{make all} after getting this
1804 failure.
1805
1806 @html
1807 </p>
1808 <hr>
1809 @end html
1810 @heading @anchor{arc-*-elf}arc-*-elf
1811 Argonaut ARC processor.
1812 This configuration is intended for embedded systems.
1813
1814 @html
1815 </p>
1816 <hr>
1817 @end html
1818 @heading @anchor{arm-*-aout}arm-*-aout
1819 Advanced RISC Machines ARM-family processors. These are often used in
1820 embedded applications. There are no standard Unix configurations.
1821 This configuration corresponds to the basic instruction sequences and will
1822 produce @file{a.out} format object modules.
1823
1824 You may need to make a variant of the file @file{arm.h} for your particular
1825 configuration.
1826
1827 @html
1828 </p>
1829 <hr>
1830 @end html
1831 @heading @anchor{arm-*-elf}arm-*-elf
1832 This configuration is intended for embedded systems.
1833
1834 @html
1835 </p>
1836 <hr>
1837 @end html
1838 @heading @anchor{arm*-*-linux-gnu}arm*-*-linux-gnu
1839
1840 We require GNU binutils 2.10 or newer.
1841
1842 @html
1843 </p>
1844 <hr>
1845 @end html
1846 @heading @anchor{avr}avr
1847
1848 ATMEL AVR-family micro controllers. These are used in embedded
1849 applications. There are no standard Unix configurations.
1850 @ifnothtml
1851 @xref{AVR Options,, AVR Options, gcc, Using and Porting the GNU Compiler
1852 Collection (GCC)},
1853 @end ifnothtml
1854 @ifhtml
1855 See ``AVR Options'' in the main manual
1856 @end ifhtml
1857 for the list of supported MCU types.
1858
1859 Use @samp{configure --target=avr --enable-languages="c"} to configure GCC@.
1860
1861 Further installation notes and other useful information about AVR tools
1862 can also be obtained from:
1863
1864 @itemize @bullet
1865 @item
1866 @uref{http://home.overta.ru/users/denisc,,http://home.overta.ru/users/denisc}
1867 @item
1868 @uref{http://www.amelek.gda.pl/avr,,http://www.amelek.gda.pl/avr}
1869 @end itemize
1870
1871 We @emph{strongly} recommend using binutils 2.11 or newer.
1872
1873 The following error:
1874 @example
1875 Error: register required
1876 @end example
1877
1878 indicates that you should upgrade to a newer version of the binutils.
1879
1880 @html
1881 </p>
1882 <hr>
1883 @end html
1884 @heading @anchor{c4x}c4x
1885
1886 Texas Instruments TMS320C3x and TMS320C4x Floating Point Digital Signal
1887 Processors. These are used in embedded applications. There are no
1888 standard Unix configurations.
1889 @ifnothtml
1890 @xref{TMS320C3x/C4x Options,, TMS320C3x/C4x Options, gcc, Using and
1891 Porting the GNU Compiler Collection (GCC)},
1892 @end ifnothtml
1893 @ifhtml
1894 See ``TMS320C3x/C4x Options'' in the main manual
1895 @end ifhtml
1896 for the list of supported MCU types.
1897
1898 GCC can be configured as a cross compiler for both the C3x and C4x
1899 architectures on the same system. Use @samp{configure --target=c4x
1900 --enable-languages="c,c++"} to configure.
1901
1902
1903 Further installation notes and other useful information about C4x tools
1904 can also be obtained from:
1905
1906 @itemize @bullet
1907 @item
1908 @uref{http://www.elec.canterbury.ac.nz/c4x/,,http://www.elec.canterbury.ac.nz/c4x/}
1909 @end itemize
1910
1911 @html
1912 </p>
1913 <hr>
1914 @end html
1915 @heading @anchor{cris}CRIS
1916
1917 CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
1918 series. These are used in embedded applications.
1919
1920 @ifnothtml
1921 @xref{CRIS Options,, CRIS Options, gcc, Using and Porting the GNU Compiler
1922 Collection (GCC)},
1923 @end ifnothtml
1924 @ifhtml
1925 See ``CRIS Options'' in the main manual
1926 @end ifhtml
1927 for a list of CRIS-specific options.
1928
1929 There are a few different CRIS targets:
1930 @table @code
1931 @item cris-axis-aout
1932 Old target. Includes a multilib for the @samp{elinux} a.out-based
1933 target. No multilibs for newer architecture variants.
1934 @item cris-axis-elf
1935 Mainly for monolithic embedded systems. Includes a multilib for the
1936 @samp{v10} core used in @samp{ETRAX 100 LX}.
1937 @item cris-axis-linux-gnu
1938 A GNU/Linux port for the CRIS architecture, currently targeting
1939 @samp{ETRAX 100 LX} by default.
1940 @end table
1941
1942 For @code{cris-axis-aout} and @code{cris-axis-elf} you need binutils 2.11
1943 or newer. For @code{cris-axis-linux-gnu} you need binutils 2.12 or newer.
1944
1945 Pre-packaged tools can be obtained from
1946 @uref{ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/}. More
1947 information about this platform is available at
1948 @uref{http://developer.axis.com/}.
1949
1950 @html
1951 </p>
1952 <hr>
1953 @end html
1954 @heading @anchor{dos}DOS
1955
1956 Please have a look at our @uref{binaries.html,,binaries page}.
1957
1958 You cannot install GCC by itself on MSDOS; it will not compile under
1959 any MSDOS compiler except itself. You need to get the complete
1960 compilation package DJGPP, which includes binaries as well as sources,
1961 and includes all the necessary compilation tools and libraries.
1962
1963 @html
1964 </p>
1965 <hr>
1966 @end html
1967 @heading @anchor{dsp16xx}dsp16xx
1968 A port to the AT&T DSP1610 family of processors.
1969
1970 @html
1971 </p>
1972 <hr>
1973 @end html
1974 @heading @anchor{*-*-freebsd*}*-*-freebsd*
1975
1976 The version of binutils installed in @file{/usr/bin} is known to work unless
1977 otherwise specified in any per-architecture notes. However, binutils
1978 2.12.1 or greater is known to improve overall testsuite results.
1979
1980 FreeBSD 1 is no longer supported in GCC 3.2.
1981
1982 For FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
1983 configuration support and files as shipped with GCC 2.95 are still in
1984 place. FreeBSD 2.2.7 has been known to bootstrap completely; however,
1985 it is unknown which version of binutils was used (it is assumed that it
1986 was the system copy in @file{/usr/bin}) and C++ EH failures were noted.
1987
1988 For FreeBSD using the ELF file format: DWARF 2 debugging is now the
1989 default for all CPU architectures. It had been the default on
1990 FreeBSD/alpha since its inception. You may use @option{-gstabs} instead
1991 of @option{-g}, if you really want the old debugging format. There are
1992 no known issues with mixing object files and libraries with different
1993 debugging formats. Otherwise, this release of GCC should now match more
1994 of the configuration used in the stock FreeBSD configuration of GCC. In
1995 particular, @option{--enable-threads} is now configured by default.
1996 However, as a general user, do not attempt to replace the system
1997 compiler with this release. Known to bootstrap and check with good
1998 results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4, 4.5-STABLE and 5-CURRENT@.
1999
2000 In principle, @option{--enable-threads} is now compatible with
2001 @option{--enable-libgcj} on FreeBSD@. However, it has only been built
2002 and tested on i386-*-freebsd4.5 and alpha-*-freebsd5.0. The static
2003 library may be incorrectly built (symbols are missing at link time).
2004 There is a rare timing-based startup hang (probably involves an
2005 assupmtion about the thread library). Multi-threaded boehm-gc (required for
2006 libjava) exposes severe threaded signal-handling bugs on FreeBSD before
2007 4.5-RELEASE. The alpha port may not fully bootstrap without some manual
2008 intervention: gcjh will crash with a floating-point exception while
2009 generating @file{java/lang/Double.h} (just copy the version built on
2010 i386-*-freebsd* and rerun the top-level gmake with no arguments and it
2011 should properly complete the bootstrap). Other CPU architectures
2012 supported by FreeBSD will require additional configuration tuning in, at
2013 the very least, both boehm-gc and libffi.
2014
2015 Shared @file{libgcc_s.so} is now built and installed by default.
2016
2017 @html
2018 </p>
2019 <hr>
2020 @end html
2021 @heading @anchor{h8300-hms}h8300-hms
2022 Hitachi H8/300 series of processors.
2023
2024 Please have a look at our @uref{binaries.html,,binaries page}.
2025
2026 The calling convention and structure layout has changed in release 2.6.
2027 All code must be recompiled. The calling convention now passes the
2028 first three arguments in function calls in registers. Structures are no
2029 longer a multiple of 2 bytes.
2030
2031 @html
2032 </p>
2033 <hr>
2034 @end html
2035 @heading @anchor{hppa*-hp-hpux*}hppa*-hp-hpux*
2036
2037 We @emph{highly} recommend using gas/binutils 2.8 or newer on all hppa
2038 platforms; you may encounter a variety of problems when using the HP
2039 assembler.
2040
2041 Specifically, @option{-g} does not work on HP-UX (since that system
2042 uses a peculiar debugging format which GCC does not know about), unless you
2043 use GAS and GDB and configure GCC with the
2044 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and
2045 @option{--with-as=@dots{}} options.
2046
2047 If you wish to use pa-risc 2.0 architecture support, you must use either
2048 the HP assembler, gas/binutils 2.11 or a recent
2049 @uref{ftp://sources.redhat.com/pub/binutils/snapshots,,snapshot of gas}.
2050
2051 There are two default scheduling models for instructions. These are
2052 PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
2053 architecture specified for the target machine when configuring.
2054 PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
2055 the target is a @samp{hppa1*} machine.
2056
2057 The PROCESSOR_8000 model is not well suited to older processors. Thus,
2058 it is important to completely specify the machine architecture when
2059 configuring if you want a model other than PROCESSOR_8000. The macro
2060 TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
2061 default scheduling model is desired.
2062
2063 More specific information to @samp{hppa*-hp-hpux*} targets follows.
2064
2065 @html
2066 </p>
2067 <hr>
2068 @end html
2069 @heading @anchor{hppa*-hp-hpux9}hppa*-hp-hpux9
2070
2071 The HP assembler has major problems on this platform. We've tried to work
2072 around the worst of the problems. However, those workarounds may be causing
2073 linker crashes in some circumstances; the workarounds also probably prevent
2074 shared libraries from working. Use the GNU assembler to avoid these problems.
2075
2076
2077 The configuration scripts for GCC will also trigger a bug in the hpux9
2078 shell. To avoid this problem set @env{CONFIG_SHELL} to @file{/bin/ksh}
2079 and @env{SHELL} to @file{/bin/ksh} in your environment.
2080
2081
2082 @html
2083 </p>
2084 <hr>
2085 @end html
2086 @heading @anchor{hppa*-hp-hpux10}hppa*-hp-hpux10
2087
2088 For hpux10.20, we @emph{highly} recommend you pick up the latest sed patch
2089 @code{PHCO_19798} from HP@. HP has two sites which provide patches free of
2090 charge:
2091
2092 @itemize @bullet
2093 @item
2094 @html
2095 <a href="http://us-support.external.hp.com">US, Canada, Asia-Pacific, and
2096 Latin-America</a>
2097 @end html
2098 @ifnothtml
2099 @uref{http://us-support.external.hp.com,,}US, Canada, Asia-Pacific, and
2100 Latin-America
2101 @end ifnothtml
2102 @item
2103 @uref{http://europe-support.external.hp.com,,Europe}
2104 @end itemize
2105
2106 The HP assembler on these systems is much better than the hpux9 assembler,
2107 but still has some problems. Most notably the assembler inserts timestamps
2108 into each object file it creates, causing the 3-stage comparison test to fail
2109 during a @samp{make bootstrap}. You should be able to continue by
2110 saying @samp{make all} after getting the failure from @samp{make
2111 bootstrap}.
2112
2113
2114 @html
2115 </p>
2116 <hr>
2117 @end html
2118 @heading @anchor{hppa*-hp-hpux11}hppa*-hp-hpux11
2119
2120 GCC 3.0 and up support HP-UX 11. You must use GNU binutils 2.11 or above on
2121 this platform. Thread support is not currently implemented for this
2122 platform, so @option{--enable-threads} does not work.
2123 See @uref{http://gcc.gnu.org/ml/gcc-prs/2002-01/msg00551.html}
2124 and @uref{http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00663.html}.
2125 GCC 2.95.x is not supported under HP-UX 11 and cannot be used to
2126 compile GCC 3.0 and up. Refer to @uref{binaries.html,,binaries} for
2127 information about obtaining precompiled GCC binaries for HP-UX.
2128
2129 @html
2130 </p>
2131 <hr>
2132 @end html
2133 @heading @anchor{i370-*-*}i370-*-*
2134 This port is very preliminary and has many known bugs. We hope to
2135 have a higher-quality port for this machine soon.
2136
2137 @html
2138 </p>
2139 <hr>
2140 @end html
2141 @heading @anchor{*-*-linux-gnu}*-*-linux-gnu
2142
2143 If you use glibc 2.2 (or 2.1.9x), GCC 2.95.2 won't install
2144 out-of-the-box. You'll get compile errors while building @samp{libstdc++}.
2145 The patch @uref{glibc-2.2.patch,,glibc-2.2.patch}, that is to be
2146 applied in the GCC source tree, fixes the compatibility problems.
2147
2148 @html
2149 </p>
2150 @end html
2151
2152 @html
2153 <p>
2154 @end html
2155
2156 Currently Glibc 2.2.3 (and older releases) and GCC 3.0 are out of sync
2157 since the latest exception handling changes for GCC@. Compiling glibc
2158 with GCC 3.0 will give a binary incompatible glibc and therefore cause
2159 lots of problems and might make your system completly unusable. This
2160 will definitly need fixes in glibc but might also need fixes in GCC@. We
2161 strongly advise to wait for glibc 2.2.4 and to read the release notes of
2162 glibc 2.2.4 whether patches for GCC 3.0 are needed. You can use glibc
2163 2.2.3 with GCC 3.0, just do not try to recompile it.
2164
2165 @html
2166 </p>
2167 <hr>
2168 @end html
2169 @heading @anchor{ix86-*-linux*aout}i?86-*-linux*aout
2170 Use this configuration to generate @file{a.out} binaries on Linux-based
2171 GNU systems. This configuration is being superseded. You must use
2172 gas/binutils version 2.5.2 or later.
2173
2174 @html
2175 </p>
2176 <hr>
2177 @end html
2178 @heading @anchor{ix86-*-linux*}i?86-*-linux*
2179
2180 You will need binutils 2.9.1.0.15 or newer for exception handling to work.
2181
2182 If you receive Signal 11 errors when building on GNU/Linux, then it is
2183 possible you have a hardware problem. Further information on this can be
2184 found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}.
2185
2186 @html
2187 </p>
2188 <hr>
2189 @end html
2190 @heading @anchor{ix86-*-sco}i?86-*-sco
2191 Compilation with RCC is recommended. Also, it may be a good idea to
2192 link with GNU malloc instead of the malloc that comes with the system.
2193
2194 @html
2195 </p>
2196 <hr>
2197 @end html
2198 @heading @anchor{ix86-*-sco3.2v4}i?86-*-sco3.2v4
2199 Use this configuration for SCO release 3.2 version 4.
2200
2201 @html
2202 </p>
2203 <hr>
2204 @end html
2205 @heading @anchor{ix86-*-sco3.2v5*}i?86-*-sco3.2v5*
2206 Use this for the SCO OpenServer Release 5 family of operating systems.
2207
2208 Unlike earlier versions of GCC, the ability to generate COFF with this
2209 target is no longer provided.
2210
2211 Earlier versions of GCC emitted DWARF 1 when generating ELF to allow
2212 the system debugger to be used. That support was too burdensome to
2213 maintain. GCC now emits only DWARF 2 for this target. This means you
2214 may use either the UDK debugger or GDB to debug programs built by this
2215 version of GCC@.
2216
2217 Use of the @option{-march=pentiumpro} flag can result in
2218 unrecognized opcodes when using the native assembler on OS versions before
2219 5.0.6. (Support for P6 opcodes was added to the native ELF assembler in
2220 that version.) While it's rather rare to see these emitted by GCC yet,
2221 errors of the basic form:
2222
2223 @example
2224 /usr/tmp/ccaNlqBc.s:22:unknown instruction: fcomip
2225 /usr/tmp/ccaNlqBc.s:50:unknown instruction: fucomip
2226 @end example
2227
2228 are symptoms of this problem. You may work around this by not
2229 building affected files with that flag, by using the GNU assembler, or
2230 by using the assembler provided with the current version of the OS@.
2231 Users of GNU assembler should see the note below for hazards on doing
2232 so.
2233
2234 The native SCO assembler that is provided with the OS at no
2235 charge is normally required. If, however, you must be able to use
2236 the GNU assembler (perhaps you're compiling code with asms that
2237 require GAS syntax) you may configure this package using the flags
2238 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}}. You must
2239 use a recent version of GNU binutils; versions past 2.9.1 seem to work
2240 well.
2241
2242 In general, the @option{--with-gnu-as} option isn't as well tested
2243 as the native assembler.
2244
2245 Look in @file{gcc/config/i386/sco5.h} (search for ``messy'') for
2246 additional OpenServer-specific flags.
2247
2248 Systems based on OpenServer before 5.0.4 (@samp{uname -X}
2249 will tell you what you're running) require TLS597 from
2250 @uref{ftp://ftp.sco.com/TLS/,,ftp://ftp.sco.com/TLS/}
2251 for C++ constructors and destructors to work right.
2252
2253 The system linker in (at least) 5.0.4 and 5.0.5 will sometimes
2254 do the wrong thing for a construct that GCC will emit for PIC
2255 code. This can be seen as execution testsuite failures when using
2256 @option{-fPIC} on @file{921215-1.c}, @file{931002-1.c}, @file{nestfunc-1.c}, and @file{gcov-1.c}.
2257 For 5.0.5, an updated linker that will cure this problem is
2258 available. You must install both
2259 @uref{ftp://ftp.sco.com/Supplements/rs505a/,,ftp://ftp.sco.com/Supplements/rs505a/}
2260 and @uref{ftp://ftp.sco.com/SLS/,,OSS499A}.
2261
2262 The dynamic linker in OpenServer 5.0.5 (earlier versions may show
2263 the same problem) aborts on certain G77-compiled programs. It's particularly
2264 likely to be triggered by building Fortran code with the @option{-fPIC} flag.
2265 Although it's conceivable that the error could be triggered by other
2266 code, only G77-compiled code has been observed to cause this abort.
2267 If you are getting core dumps immediately upon execution of your
2268 G77 program---and especially if it's compiled with @option{-fPIC}---try applying
2269 @uref{sco_osr5_g77.patch,,@file{sco_osr5_g77.patch}} to your @samp{libf2c} and
2270 rebuilding GCC@.
2271 Affected faults, when analyzed in a debugger, will show a stack
2272 backtrace with a fault occurring in @code{rtld()} and the program
2273 running as @file{/usr/lib/ld.so.1}. This problem has been reported to SCO
2274 engineering and will hopefully be addressed in later releases.
2275
2276
2277 @html
2278 </p>
2279 <hr>
2280 @end html
2281 @heading @anchor{ix86-*-udk}i?86-*-udk
2282
2283 This target emulates the SCO Universal Development Kit and requires that
2284 package be installed. (If it is installed, you will have a
2285 @file{/udk/usr/ccs/bin/cc} file present.) It's very much like the
2286 @samp{i?86-*-unixware7*} target
2287 but is meant to be used when hosting on a system where UDK isn't the
2288 default compiler such as OpenServer 5 or Unixware 2. This target will
2289 generate binaries that will run on OpenServer, Unixware 2, or Unixware 7,
2290 with the same warnings and caveats as the SCO UDK@.
2291
2292 This target is a little tricky to build because we have to distinguish
2293 it from the native tools (so it gets headers, startups, and libraries
2294 from the right place) while making the tools not think we're actually
2295 building a cross compiler. The easiest way to do this is with a configure
2296 command like this:
2297
2298 @samp{CC=/udk/usr/ccs/bin/cc @var{/your/path/to}/gcc/configure
2299 --host=i686-pc-udk --target=i686-pc-udk --program-prefix=udk-}
2300
2301 @emph{You should substitute @samp{i686} in the above command with the appropriate
2302 processor for your host.}
2303
2304 After the usual @samp{make bootstrap} and
2305 @samp{make install}, you can then access the UDK-targeted GCC
2306 tools by adding @command{udk-} before the commonly known name. For
2307 example, to invoke the C compiler, you would use @command{udk-gcc}.
2308 They will coexist peacefully with any native-target GCC tools you may
2309 have installed.
2310
2311
2312 @html
2313 </p>
2314 <hr>
2315 @end html
2316 @heading @anchor{ia64-*-linux}ia64-*-linux
2317 IA-64 processor (also known as IPF, or Itanium Processor Family)
2318 running GNU/Linux.
2319
2320 The toolchain is not completely finished, so requirements will continue
2321 to change.
2322 GCC 3.0.1 and later require glibc 2.2.4.
2323 GCC 3.0.2 requires binutils from 2001-09-05 or later.
2324 GCC 3.0.1 requires binutils 2.11.1 or later.
2325
2326 None of the following versions of GCC has an ABI that is compatible
2327 with any of the other versions in this list, with the exception that
2328 Red Hat 2.96 and Trillian 000171 are compatible with each other:
2329 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
2330 This primarily affects C++ programs and programs that create shared libraries.
2331 Because of these ABI incompatibilities, GCC 3.0.2 is not recommended for
2332 user programs on GNU/Linux systems built using earlier compiler releases.
2333 GCC 3.0.2 is recommended for compiling linux, the kernel.
2334 GCC 3.0.2 is believed to be fully ABI compliant, and hence no more major
2335 ABI changes are expected.
2336
2337 @html
2338 </p>
2339 <hr>
2340 @end html
2341 @heading @anchor{*-lynx-lynxos}*-lynx-lynxos
2342 LynxOS 2.2 and earlier comes with GCC 1.x already installed as
2343 @file{/bin/gcc}. You should compile with this instead of @file{/bin/cc}.
2344 You can tell GCC to use the GNU assembler and linker, by specifying
2345 @samp{--with-gnu-as --with-gnu-ld} when configuring. These will produce
2346 COFF format object files and executables; otherwise GCC will use the
2347 installed tools, which produce @file{a.out} format executables.
2348
2349 @html
2350 </p>
2351 <hr>
2352 <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
2353 @end html
2354 @heading @anchor{*-ibm-aix*}*-ibm-aix*
2355
2356 AIX Make frequently has problems with GCC makefiles. GNU Make 3.76 or
2357 newer is recommended to build on this platform.
2358
2359 Errors involving @code{alloca} when building GCC generally are due
2360 to an incorrect definition of @code{CC} in the Makefile or mixing files
2361 compiled with the native C compiler and GCC@. During the stage1 phase of
2362 the build, the native AIX compiler @strong{must} be invoked as @command{cc}
2363 (not @command{xlc}). Once @command{configure} has been informed of
2364 @command{xlc}, one needs to use @samp{make distclean} to remove the
2365 configure cache files and ensure that @env{CC} environment variable
2366 does not provide a definition that will confuse @command{configure}.
2367 If this error occurs during stage2 or later, then the problem most likely
2368 is the version of Make (see above).
2369
2370 The GNU Assembler incorrectly reports that it supports WEAK symbols on
2371 AIX which causes GCC to try to utilize weak symbol functionality which
2372 is not really supported on the platform. The native @command{as} and
2373 @command{ld} still are recommended. The native AIX tools do
2374 interoperate with GCC@.
2375
2376 Building @file{libstdc++.a} requires a fix for an AIX Assembler bug
2377 APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).
2378
2379 @samp{libstdc++} in GCC 3.2 increments the major version number of the
2380 shared object and GCC installation places the @file{libstdc++.a}
2381 shared library in a common location which will overwrite the GCC 3.1
2382 version of the shared library. Applications either need to be
2383 re-linked against the new shared library or the GCC 3.1 version of the
2384 @samp{libstdc++} shared object needs to be available to the AIX
2385 runtime loader. The GCC 3.1 @samp{libstdc++.so.4} shared object can
2386 be installed for runtime dynamic loading using the following steps to
2387 set the @samp{F_LOADONLY} flag in the shared object for @emph{each}
2388 multilib @file{libstdc++.a} installed:
2389
2390 Extract the shared object from each the GCC 3.1 @file{libstdc++.a}
2391 archive:
2392 @example
2393 % ar -x libstdc++.a libstdc++.so.4
2394 @end example
2395
2396 Enable the @samp{F_LOADONLY} flag so that the shared object will be
2397 available for runtime dynamic loading, but not linking:
2398 @example
2399 % strip -e libstdc++.so.4
2400 @end example
2401
2402 Archive the runtime-only shared object in the GCC 3.2
2403 @file{libstdc++.a} archive:
2404 @example
2405 % ar -q libstdc++.a libstdc++.so.4
2406 @end example
2407
2408 Linking executables and shared libraries may produce warnings of
2409 duplicate symbols. The assembly files generated by GCC for AIX always
2410 have included multiple symbol definitions for certain global variable
2411 and function declarations in the original program. The warnings should
2412 not prevent the linker from producing a correct library or runnable
2413 executable.
2414
2415 AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and
2416 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
2417 to parse archive libraries did not handle the new format correctly.
2418 These routines are used by GCC and result in error messages during
2419 linking such as ``not a COFF file''. The version of the routines shipped
2420 with AIX 4.3.1 should work for a 32-bit environment. The @option{-g}
2421 option of the archive command may be used to create archives of 32-bit
2422 objects using the original ``small format''. A correct version of the
2423 routines is shipped with AIX 4.3.2 and above.
2424
2425 Some versions of the AIX binder (linker) can fail with a relocation
2426 overflow severe error when the @option{-bbigtoc} option is used to link
2427 GCC-produced object files into an executable that overflows the TOC@. A fix
2428 for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
2429 available from IBM Customer Support and from its
2430 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2431 website as PTF U455193.
2432
2433 The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
2434 with a segmentation fault when invoked by any version of GCC@. A fix for
2435 APAR IX87327 is available from IBM Customer Support and from its
2436 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2437 website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
2438
2439 The initial assembler shipped with AIX 4.3.0 generates incorrect object
2440 files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
2441 TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
2442 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2443 website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
2444
2445 AIX provides National Language Support (NLS)@. Compilers and assemblers
2446 use NLS to support locale-specific representations of various data
2447 formats including floating-point numbers (e.g., @samp{.} vs @samp{,} for
2448 separating decimal fractions). There have been problems reported where
2449 GCC does not produce the same floating-point formats that the assembler
2450 expects. If one encounters this problem, set the @env{LANG}
2451 environment variable to @samp{C} or @samp{En_US}.
2452
2453 By default, GCC for AIX 4.1 and above produces code that can be used on
2454 both Power or PowerPC processors.
2455
2456 A default can be specified with the @option{-mcpu=@var{cpu_type}}
2457 switch and using the configure option @option{--with-cpu-@var{cpu_type}}.
2458
2459 @html
2460 </p>
2461 <hr>
2462 @end html
2463 @heading @anchor{ip2k-*-elf}ip2k-*-elf
2464 Ubicom IP2022 micro controller.
2465 This configuration is intended for embedded systems.
2466 There are no standard Unix configurations.
2467
2468 Use @samp{configure --target=ip2k-elf --enable-languages=c} to configure GCC@.
2469
2470 @html
2471 </p>
2472 <hr>
2473 @end html
2474 @heading @anchor{m32r-*-elf}m32r-*-elf
2475 Mitsubishi M32R processor.
2476 This configuration is intended for embedded systems.
2477
2478 @html
2479 </p>
2480 <hr>
2481 @end html
2482 @heading @anchor{m68000-hp-bsd}m68000-hp-bsd
2483 HP 9000 series 200 running BSD@. Note that the C compiler that comes
2484 with this system cannot compile GCC; contact @email{law@@cygnus.com}
2485 to get binaries of GCC for bootstrapping.
2486
2487 @html
2488 </p>
2489 <hr>
2490 @end html
2491 @heading @anchor{m6811-elf}m6811-elf
2492 Motorola 68HC11 family micro controllers. These are used in embedded
2493 applications. There are no standard Unix configurations.
2494
2495 @html
2496 </p>
2497 <hr>
2498 @end html
2499 @heading @anchor{m6812-elf}m6812-elf
2500 Motorola 68HC12 family micro controllers. These are used in embedded
2501 applications. There are no standard Unix configurations.
2502
2503 @html
2504 </p>
2505 <hr>
2506 @end html
2507 @heading @anchor{m68k-att-sysv}m68k-att-sysv
2508 AT&T 3b1, a.k.a.@: 7300 PC@. This version of GCC cannot
2509 be compiled with the system C compiler, which is too buggy.
2510 You will need to get a previous version of GCC and use it to
2511 bootstrap. Binaries are available from the OSU-CIS archive, at
2512 @uref{ftp://archive.cis.ohio-state.edu/pub/att7300/}.
2513
2514 @html
2515 </p>
2516 <hr>
2517 @end html
2518 @heading @anchor{m68k-crds-unos}m68k-crds-unos
2519 Use @samp{configure unos} for building on Unos.
2520
2521 The Unos assembler is named @code{casm} instead of @code{as}. For some
2522 strange reason linking @file{/bin/as} to @file{/bin/casm} changes the
2523 behavior, and does not work. So, when installing GCC, you should
2524 install the following script as @file{as} in the subdirectory where
2525 the passes of GCC are installed:
2526
2527 @example
2528 #!/bin/sh
2529 casm $*
2530 @end example
2531
2532 The default Unos library is named @file{libunos.a} instead of
2533 @file{libc.a}. To allow GCC to function, either change all
2534 references to @option{-lc} in @file{gcc.c} to @option{-lunos} or link
2535 @file{/lib/libc.a} to @file{/lib/libunos.a}.
2536
2537 @cindex @code{alloca}, for Unos
2538 When compiling GCC with the standard compiler, to overcome bugs in
2539 the support of @code{alloca}, do not use @option{-O} when making stage 2.
2540 Then use the stage 2 compiler with @option{-O} to make the stage 3
2541 compiler. This compiler will have the same characteristics as the usual
2542 stage 2 compiler on other systems. Use it to make a stage 4 compiler
2543 and compare that with stage 3 to verify proper compilation.
2544
2545 (Perhaps simply defining @code{ALLOCA} in @file{x-crds} as described in
2546 the comments there will make the above paragraph superfluous. Please
2547 inform us of whether this works.)
2548
2549 Unos uses memory segmentation instead of demand paging, so you will need
2550 a lot of memory. 5 Mb is barely enough if no other tasks are running.
2551 If linking @file{cc1} fails, try putting the object files into a library
2552 and linking from that library.
2553
2554 @html
2555 </p>
2556 <hr>
2557 @end html
2558 @heading @anchor{m68k-hp-hpux}m68k-hp-hpux
2559 HP 9000 series 300 or 400 running HP-UX@. HP-UX version 8.0 has a bug in
2560 the assembler that prevents compilation of GCC@. This
2561 bug manifests itself during the first stage of compilation, while
2562 building @file{libgcc2.a}:
2563
2564 @smallexample
2565 _floatdisf
2566 cc1: warning: `-g' option not supported on this version of GCC
2567 cc1: warning: `-g1' option not supported on this version of GCC
2568 ./xgcc: Internal compiler error: program as got fatal signal 11
2569 @end smallexample
2570
2571 A patched version of the assembler is available as the file
2572 @uref{ftp://altdorf.ai.mit.edu/archive/cph/hpux-8.0-assembler}. If you
2573 have HP software support, the patch can also be obtained directly from
2574 HP, as described in the following note:
2575
2576 @quotation
2577 This is the patched assembler, to patch SR#1653-010439, where the
2578 assembler aborts on floating point constants.
2579
2580 The bug is not really in the assembler, but in the shared library
2581 version of the function ``cvtnum(3c)''. The bug on ``cvtnum(3c)'' is
2582 SR#4701-078451. Anyway, the attached assembler uses the archive
2583 library version of ``cvtnum(3c)'' and thus does not exhibit the bug.
2584 @end quotation
2585
2586 This patch is also known as PHCO_4484.
2587
2588 In addition, if you wish to use gas, you must use
2589 gas version 2.1 or later, and you must use the GNU linker version 2.1 or
2590 later. Earlier versions of gas relied upon a program which converted the
2591 gas output into the native HP-UX format, but that program has not been
2592 kept up to date. gdb does not understand that native HP-UX format, so
2593 you must use gas if you wish to use gdb.
2594
2595 On HP-UX version 8.05, but not on 8.07 or more recent versions, the
2596 @code{fixproto} shell script triggers a bug in the system shell. If you
2597 encounter this problem, upgrade your operating system or use BASH (the
2598 GNU shell) to run @code{fixproto}. This bug will cause the fixproto
2599 program to report an error of the form:
2600
2601 @example
2602 ./fixproto: sh internal 1K buffer overflow
2603 @end example
2604
2605 To fix this, you can also change the first line of the fixproto script
2606 to look like:
2607
2608 @example
2609 #!/bin/ksh
2610 @end example
2611
2612
2613 @html
2614 </p>
2615 <hr>
2616 @end html
2617 @heading @anchor{m68k-ncr-*}m68k-ncr-*
2618 On the Tower models 4@var{n}0 and 6@var{n}0, by default a process is not
2619 allowed to have more than one megabyte of memory. GCC cannot compile
2620 itself (or many other programs) with @option{-O} in that much memory.
2621
2622 To solve this problem, reconfigure the kernel adding the following line
2623 to the configuration file:
2624
2625 @smallexample
2626 MAXUMEM = 4096
2627 @end smallexample
2628
2629
2630 @html
2631 </p>
2632 <hr>
2633 @end html
2634 @heading @anchor{m68k-sun}m68k-sun
2635 Sun 3. We do not provide a configuration file to use the Sun FPA by
2636 default, because programs that establish signal handlers for floating
2637 point traps inherently cannot work with the FPA@.
2638
2639 @html
2640 </p>
2641 <hr>
2642 @end html
2643 @heading @anchor{m68k-sun-sunos4.1.1}m68k-sun-sunos4.1.1
2644
2645 It is reported that you may need the GNU assembler on this platform.
2646
2647
2648 @html
2649 </p>
2650 <hr>
2651 @end html
2652 @heading @anchor{mips-*-*}mips-*-*
2653 If on a MIPS system you get an error message saying ``does not have gp
2654 sections for all it's [sic] sectons [sic]'', don't worry about it. This
2655 happens whenever you use GAS with the MIPS linker, but there is not
2656 really anything wrong, and it is okay to use the output file. You can
2657 stop such warnings by installing the GNU linker.
2658
2659 It would be nice to extend GAS to produce the gp tables, but they are
2660 optional, and there should not be a warning about their absence.
2661
2662 @heading @anchor{mips-sgi-irix5}mips-sgi-irix5
2663
2664 This configuration has considerable problems, which will be fixed in a
2665 future release.
2666
2667 In order to compile GCC on an SGI running IRIX 5, the ``compiler_dev.hdr''
2668 subsystem must be installed from the IDO CD-ROM supplied by Silicon
2669 Graphics. It is also available for download from
2670 @uref{http://www.sgi.com/developers/devtools/apis/ido.html,,http://www.sgi.com/developers/devtools/apis/ido.html}.
2671
2672 @code{make compare} may fail on version 5 of IRIX unless you add
2673 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
2674 assembler input file is stored in the object file, and that makes
2675 comparison fail if it differs between the @code{stage1} and
2676 @code{stage2} compilations. The option @option{-save-temps} forces a
2677 fixed name to be used for the assembler input file, instead of a
2678 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
2679 unless the comparisons fail without that option. If you do you
2680 @option{-save-temps}, you will have to manually delete the @samp{.i} and
2681 @samp{.s} files after each series of compilations.
2682
2683 If you use the MIPS C compiler to bootstrap, it may be necessary
2684 to increase its table size for switch statements with the
2685 @option{-Wf,-XNg1500} option. If you use the @option{-O2}
2686 optimization option, you also need to use @option{-Olimit 3000}.
2687
2688 To enable debugging under IRIX 5, you must use GNU @command{as} 2.11.2
2689 or later,
2690 and use the @option{--with-gnu-as} configure option when configuring GCC.
2691 GNU @command{as} is distributed as part of the binutils package.
2692 When using release 2.11.2, you need to apply a patch
2693 @uref{http://sources.redhat.com/ml/binutils/2001-07/msg00352.html,,http://sources.redhat.com/ml/binutils/2001-07/msg00352.html}
2694 which will be included in the next release of binutils.
2695
2696 When building GCC, the build process loops rebuilding @command{cc1} over
2697 and over again. This happens on @samp{mips-sgi-irix5.2}, and possibly
2698 other platforms. It has been reported that this is a known bug in the
2699 @command{make} shipped with IRIX 5.2. We recommend you use GNU
2700 @command{make} instead of the vendor supplied @command{make} program;
2701 however, you may have success with @command{smake} on IRIX 5.2 if you do
2702 not have GNU @command{make} available.
2703
2704 @html
2705 </p>
2706 <hr>
2707 @end html
2708 @heading @anchor{mips-sgi-irix6}mips-sgi-irix6
2709
2710 If you are using IRIX @command{cc} as your bootstrap compiler, you must
2711 ensure that the N32 ABI is in use. To test this, compile a simple C
2712 file with @command{cc} and then run @command{file} on the
2713 resulting object file. The output should look like:
2714
2715 @example
2716 test.o: ELF N32 MSB @dots{}
2717 @end example
2718
2719 If you see:
2720
2721 @example
2722 test.o: ELF 32-bit MSB @dots{}
2723 @end example
2724
2725 or
2726
2727 @example
2728 test.o: ELF 64-bit MSB @dots{}
2729 @end example
2730
2731 then your version of @command{cc} uses the O32 or N64 ABI by default. You
2732 should set the environment variable @env{CC} to @samp{cc -n32}
2733 before configuring GCC@.
2734
2735 If you want the resulting @command{gcc} to run on old 32-bit systems
2736 with the MIPS R4400 CPU, you need to ensure that only code for the mips3
2737 instruction set architecture (ISA) is generated. While GCC 3.x does
2738 this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change
2739 the ISA depending on the machine where GCC is built. Using one of them
2740 as the bootstrap compiler may result in mips4 code, which won't run at
2741 all on mips3-only systems. For the test program above, you should see:
2742
2743 @example
2744 test.o: ELF N32 MSB mips-3 @dots{}
2745 @end example
2746
2747 If you get:
2748
2749 @example
2750 test.o: ELF N32 MSB mips-4 @dots{}
2751 @end example
2752
2753 instead, you should set the environment variable @env{CC} to @samp{cc
2754 -n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@.
2755
2756 GCC on IRIX 6 is usually built to support both the N32 and N64 ABIs. If
2757 you build GCC on a system that doesn't have the N64 libraries installed,
2758 you need to configure with @option{--disable-multilib} so GCC doesn't
2759 try to use them. Look for @file{/usr/lib64/libc.so.1} to see if you
2760 have the 64-bit libraries installed.
2761
2762 You must @emph{not} use GNU @command{as} (which isn't built anyway as of
2763 binutils 2.11.2) on IRIX 6 platforms; doing so will only cause problems.
2764
2765 GCC does not currently support generating O32 ABI binaries in the
2766 @samp{mips-sgi-irix6} configurations. It is possible to create a GCC
2767 with O32 ABI only support by configuring it for the @samp{mips-sgi-irix5}
2768 target and using a patched GNU @command{as} 2.11.2 as documented in the
2769 @uref{#mips-sgi-irix5,,@samp{mips-sgi-irix5}} section above. Using the
2770 native assembler requires patches to GCC which will be included in a
2771 future release. It is
2772 expected that O32 ABI support will be available again in a future release.
2773
2774 The @option{--enable-threads} option doesn't currently work, a patch is
2775 in preparation for a future release. The @option{--enable-libgcj}
2776 option is disabled by default: IRIX 6 uses a very low default limit
2777 (20480) for the command line length. Although libtool contains a
2778 workaround for this problem, at least the N64 @samp{libgcj} is known not
2779 to build despite this, running into an internal error of the native
2780 @command{ld}. A sure fix is to increase this limit (@samp{ncargs}) to
2781 its maximum of 262144 bytes. If you have root access, you can use the
2782 @command{systune} command to do this.
2783
2784 GCC does not correctly pass/return structures which are
2785 smaller than 16 bytes and which are not 8 bytes. The problem is very
2786 involved and difficult to fix. It affects a number of other targets also,
2787 but IRIX 6 is affected the most, because it is a 64-bit target, and 4 byte
2788 structures are common. The exact problem is that structures are being padded
2789 at the wrong end, e.g.@: a 4 byte structure is loaded into the lower 4 bytes
2790 of the register when it should be loaded into the upper 4 bytes of the
2791 register.
2792
2793 GCC is consistent with itself, but not consistent with the SGI C compiler
2794 (and the SGI supplied runtime libraries), so the only failures that can
2795 happen are when there are library functions that take/return such
2796 structures. There are very few such library functions. Currently this
2797 is known to affect @code{inet_ntoa}, @code{inet_lnaof},
2798 @code{inet_netof}, @code{inet_makeaddr}, and @code{semctl}. Until the
2799 bug is fixed, GCC contains workarounds for the known affected functions.
2800
2801 See @uref{http://freeware.sgi.com/,,http://freeware.sgi.com/} for more
2802 information about using GCC on IRIX platforms.
2803
2804 @html
2805 </p>
2806 <hr>
2807 @end html
2808 @heading @anchor{powerpc*-*-*}powerpc-*-*
2809
2810 You can specify a default version for the @option{-mcpu=@var{cpu_type}}
2811 switch by using the configure option @option{--with-cpu-@var{cpu_type}}.
2812
2813 @html
2814 </p>
2815 <hr>
2816 @end html
2817 @heading @anchor{powerpc-*-darwin*}powerpc-*-darwin*
2818 PowerPC running Darwin (Mac OS X kernel).
2819
2820 GCC 3.0 does not support Darwin, but 3.1 and later releases will work.
2821
2822 Pre-installed versions of Mac OS X may not include any developer tools,
2823 meaning that you will not be able to build GCC from source. Tool
2824 binaries are available at
2825 @uref{http://www.opensource.apple.com/projects/darwin} (free
2826 registration required).
2827
2828 Versions of the assembler prior to ``cctools-364'' cannot handle the
2829 4-argument form of rlwinm and related mask-using instructions. Darwin
2830 1.3 (Mac OS X 10.0) uses cctools-353 for instance. To get cctools-364,
2831 check out @file{cctools} with tag @samp{Apple-364}, build it, and
2832 install the assembler as @file{usr/bin/as}. See
2833 @uref{http://www.opensource.apple.com/tools/cvs/docs.html} for details.
2834
2835 Also, the default stack limit of 512K is too small, and a bootstrap will
2836 typically fail when self-compiling @file{expr.c}. Set the stack to 800K
2837 or more, for instance by doing @samp{limit stack 800}. It's also
2838 convenient to use the GNU preprocessor instead of Apple's during the
2839 first stage of bootstrapping; this is automatic when doing @samp{make
2840 bootstrap}, but to do it from the toplevel objdir you will need to say
2841 @samp{make CC='cc -no-cpp-precomp' bootstrap}.
2842
2843 Note that the version of GCC shipped by Apple typically includes a
2844 number of extensions not available in a standard GCC release. These
2845 extensions are generally specific to Mac programming.
2846
2847 @html
2848 </p>
2849 <hr>
2850 @end html
2851 @heading @anchor{powerpc-*-elf}powerpc-*-elf, powerpc-*-sysv4
2852 PowerPC system in big endian mode, running System V.4.
2853
2854 @html
2855 </p>
2856 <hr>
2857 @end html
2858 @heading @anchor{powerpc-*-linux-gnu*}powerpc-*-linux-gnu*
2859
2860 You will need
2861 @uref{ftp://ftp.kernel.org/pub/linux/devel/binutils,,binutils 2.12.90.0.7}
2862 or newer for a working GCC@.
2863
2864 @html
2865 </p>
2866 <hr>
2867 @end html
2868 @heading @anchor{powerpc-*-netbsd*}powerpc-*-netbsd*
2869 PowerPC system in big endian mode running NetBSD@. To build the
2870 documentation you will need Texinfo version 4.1 (NetBSD 1.5.1 included
2871 Texinfo version 3.12).
2872
2873 @html
2874 </p>
2875 <hr>
2876 @end html
2877 @heading @anchor{powerpc-*-eabiaix}powerpc-*-eabiaix
2878 Embedded PowerPC system in big endian mode with @option{-mcall-aix} selected as
2879 the default.
2880
2881 @html
2882 </p>
2883 <hr>
2884 @end html
2885 @heading @anchor{powerpc-*-eabisim}powerpc-*-eabisim
2886 Embedded PowerPC system in big endian mode for use in running under the
2887 PSIM simulator.
2888
2889 @html
2890 </p>
2891 <hr>
2892 @end html
2893 @heading @anchor{powerpc-*-eabi}powerpc-*-eabi
2894 Embedded PowerPC system in big endian mode.
2895
2896 @html
2897 </p>
2898 <hr>
2899 @end html
2900 @heading @anchor{powerpcle-*-elf}powerpcle-*-elf, powerpcle-*-sysv4
2901 PowerPC system in little endian mode, running System V.4.
2902
2903 @html
2904 </p>
2905 <hr>
2906 @end html
2907 @heading @anchor{powerpcle-*-eabisim}powerpcle-*-eabisim
2908 Embedded PowerPC system in little endian mode for use in running under
2909 the PSIM simulator.
2910
2911 @html
2912 </p>
2913 <hr>
2914 @end html
2915 @heading @anchor{powerpcle-*-eabi}powerpcle-*-eabi
2916 Embedded PowerPC system in little endian mode.
2917
2918 @html
2919 </p>
2920 <hr>
2921 @end html
2922 @heading @anchor{powerpcle-*-winnt}powerpcle-*-winnt, powerpcle-*-pe
2923 PowerPC system in little endian mode running Windows NT@.
2924
2925 @html
2926 </p>
2927 <hr>
2928 @end html
2929 @heading @anchor{s390-*-linux*}s390-*-linux*
2930 S/390 system running Linux for S/390@.
2931
2932 @html
2933 </p>
2934 <hr>
2935 @end html
2936 @heading @anchor{s390x-*-linux*}s390x-*-linux*
2937 zSeries system (64-bit) running Linux for zSeries@.
2938
2939 @html
2940 </p>
2941 <hr>
2942 @end html
2943 @c Please use Solaris 2 to refer to all release of Solaris, starting
2944 @c with 2.0 until 2.6, 7, and 8. Solaris 1 was a marketing name for
2945 @c SunOS 4 releases which we don't use to avoid confusion. Solaris
2946 @c alone is too unspecific and must be avoided.
2947 @heading @anchor{*-*-solaris2*}*-*-solaris2*
2948
2949 Sun does not ship a C compiler with Solaris 2. To bootstrap and install
2950 GCC you first have to install a pre-built compiler, see our
2951 @uref{binaries.html,,binaries page} for details.
2952
2953 The Solaris 2 @command{/bin/sh} will often fail to configure
2954 @file{libstdc++-v3}, @file{boehm-gc} or
2955 @file{libjava}. If you encounter this problem, set @env{CONFIG_SHELL} to
2956 @command{/bin/ksh} in your environment before running @command{configure}.
2957
2958 Solaris 2 comes with a number of optional OS packages. Some of these
2959 packages are needed to use GCC fully, namely @code{SUNWarc},
2960 @code{SUNWbtool}, @code{SUNWesu}, @code{SUNWhea}, @code{SUNWlibm},
2961 @code{SUNWsprot}, and @code{SUNWtoo}. If you did not install all
2962 optional packages when installing Solaris 2, you will need to verify that
2963 the packages that GCC needs are installed.
2964
2965 To check whether an optional package is installed, use
2966 the @command{pkginfo} command. To add an optional package, use the
2967 @command{pkgadd} command. For further details, see the Solaris 2
2968 documentation.
2969
2970 Trying to use the linker and other tools in
2971 @file{/usr/ucb} to install GCC has been observed to cause trouble.
2972 For example, the linker may hang indefinitely. The fix is to remove
2973 @file{/usr/ucb} from your @env{PATH}.
2974
2975 All releases of GNU binutils prior to 2.11.2 have known bugs on this
2976 platform. We recommend the use of GNU binutils 2.11.2 or the vendor
2977 tools (Sun @command{as}, Sun @command{ld}).
2978
2979 Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
2980 newer: @command{g++} will complain that types are missing. These headers assume
2981 that omitting the type means @code{int}; this assumption worked for C89 but
2982 is wrong for C++, and is now wrong for C99 also.
2983
2984 @command{g++} accepts such (invalid) constructs with the option
2985 @option{-fpermissive}; it
2986 will assume that any missing type is @code{int} (as defined by C89).
2987
2988 There are patches for Solaris 2.6 (105633-56 or newer for SPARC,
2989 106248-42 or newer for Intel), Solaris 7 (108376-21 or newer for SPARC,
2990 108377-20 for Intel), and Solaris 8 (108652-24 or newer for SPARC,
2991 108653-22 for Intel) that fix this bug.
2992
2993 @html
2994 </p>
2995 <hr>
2996 @end html
2997 @heading @anchor{sparc-sun-solaris2*}sparc-sun-solaris2*
2998
2999 When GCC is configured to use binutils 2.11.2 or later the binaries
3000 produced are smaller than the ones produced using Sun's native tools;
3001 this difference is quite significant for binaries containing debugging
3002 information.
3003
3004 Sun @command{as} 4.x is broken in that it cannot cope with long symbol names.
3005 A typical error message might look similar to the following:
3006
3007 @samp{/usr/ccs/bin/as: "/var/tmp/ccMsw135.s", line 11041:
3008 error: can't compute value of an expression involving an external symbol.}
3009
3010 This is Sun bug 4237974. This is fixed with patch 108908-02 for Solaris
3011 2.6 and has been fixed in later (5.x) versions of the assembler,
3012 starting with Solaris 7.
3013
3014 Starting with Solaris 7, the operating system is capable of executing
3015 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
3016 this; the @option{-m64} option enables 64-bit code generation.
3017 However, if all you want is code tuned for the UltraSPARC CPU, you
3018 should try the @option{-mtune=ultrasparc} option instead, which produces
3019 code that, unlike full 64-bit code, can still run on non-UltraSPARC
3020 machines.
3021
3022 When configuring on a Solaris 7 or later system that is running a kernel
3023 that supports only 32-bit binaries, one must configure with
3024 @option{--disable-multilib}, since we will not be able to build the
3025 64-bit target libraries.
3026
3027 @html
3028 </p>
3029 <hr>
3030 @end html
3031 @heading @anchor{sparc-sun-solaris2.7}sparc-sun-solaris2.7
3032
3033 Sun patch 107058-01 (1999-01-13) for Solaris 7/SPARC triggers a bug in
3034 the dynamic linker. This problem (Sun bug 4210064) affects GCC 2.8
3035 and later, including all EGCS releases. Sun formerly recommended
3036 107058-01 for all Solaris 7 users, but around 1999-09-01 it started to
3037 recommend it only for people who use Sun's compilers.
3038
3039 Here are some workarounds to this problem:
3040 @itemize @bullet
3041 @item
3042 Do not install Sun patch 107058-01 until after Sun releases a
3043 complete patch for bug 4210064. This is the simplest course to take,
3044 unless you must also use Sun's C compiler. Unfortunately 107058-01
3045 is preinstalled on some new Solaris 7-based hosts, so you may have to
3046 back it out.
3047
3048 @item
3049 Copy the original, unpatched Solaris 7
3050 @command{/usr/ccs/bin/as} into
3051 @command{/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.1/as},
3052 adjusting the latter name to fit your local conventions and software
3053 version numbers.
3054
3055 @item
3056 Install Sun patch 106950-03 (1999-05-25) or later. Nobody with
3057 both 107058-01 and 106950-03 installed has reported the bug with GCC
3058 and Sun's dynamic linker. This last course of action is riskiest,
3059 for two reasons. First, you must install 106950 on all hosts that
3060 run code generated by GCC; it doesn't suffice to install it only on
3061 the hosts that run GCC itself. Second, Sun says that 106950-03 is
3062 only a partial fix for bug 4210064, but Sun doesn't know whether the
3063 partial fix is adequate for GCC@. Revision -08 or later should fix
3064 the bug. The current (as of 2001-09-24) revision is -14, and is included in
3065 the Solaris 7 Recommended Patch Cluster.
3066 @end itemize
3067
3068
3069 @html
3070 <p>
3071 <hr>
3072 @end html
3073 @heading @anchor{sparc-sun-sunos4*}sparc-sun-sunos4*
3074
3075 A bug in the SunOS 4 linker will cause it to crash when linking
3076 @option{-fPIC} compiled objects (and will therefore not allow you to build
3077 shared libraries).
3078
3079 To fix this problem you can either use the most recent version of
3080 binutils or get the latest SunOS 4 linker patch (patch ID 100170-10)
3081 from Sun's patch site.
3082
3083 Sometimes on a Sun 4 you may observe a crash in the program
3084 @command{genflags} or @command{genoutput} while building GCC. This is said to
3085 be due to a bug in @command{sh}. You can probably get around it by running
3086 @command{genflags} or @command{genoutput} manually and then retrying the
3087 @command{make}.
3088
3089 @html
3090 </p>
3091 <hr>
3092 @end html
3093 @heading @anchor{sparc-unknown-linux-gnulibc1}sparc-unknown-linux-gnulibc1
3094
3095 It has been reported that you might need
3096 @uref{ftp://ftp.yggdrasil.com/private/hjl,,binutils 2.8.1.0.23}
3097 for this platform, too.
3098
3099
3100 @html
3101 </p>
3102 <hr>
3103 @end html
3104 @heading @anchor{sparc-*-linux*}sparc-*-linux*
3105
3106 GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
3107 or newer on this platform. All earlier binutils and glibc
3108 releases mishandled unaligned relocations on @code{sparc-*-*} targets.
3109
3110
3111 @html
3112 </p>
3113 <hr>
3114 @end html
3115 @heading @anchor{sparc64-*-*}sparc64-*-*
3116
3117 GCC version 2.95 is not able to compile code correctly for
3118 @code{sparc64} targets. Users of the Linux kernel, at least,
3119 can use the @code{sparc32} program to start up a new shell
3120 invocation with an environment that causes @command{configure} to
3121 recognize (via @samp{uname -a}) the system as @samp{sparc-*-*} instead.
3122
3123 @html
3124 </p>
3125 <hr>
3126 @end html
3127 @heading @anchor{sparcv9-*-solaris2*}sparcv9-*-solaris2*
3128
3129 The following compiler flags must be specified in the configure
3130 step in order to bootstrap this target with the Sun compiler:
3131
3132 @example
3133 % CC="cc -xildoff -xarch=v9" @var{srcdir}/configure [@var{options}] [@var{target}]
3134 @end example
3135
3136 @option{-xildoff} turns off the incremental linker, and @option{-xarch=v9}
3137 specifies the v9 architecture to the Sun linker and assembler.
3138
3139 @html
3140 </p>
3141 <hr>
3142 @end html
3143 @heading @anchor{#*-*-sysv*}*-*-sysv*
3144 On System V release 3, you may get this error message
3145 while linking:
3146
3147 @smallexample
3148 ld fatal: failed to write symbol name @var{something}
3149 in strings table for file @var{whatever}
3150 @end smallexample
3151
3152 This probably indicates that the disk is full or your ulimit won't allow
3153 the file to be as large as it needs to be.
3154
3155 This problem can also result because the kernel parameter @code{MAXUMEM}
3156 is too small. If so, you must regenerate the kernel and make the value
3157 much larger. The default value is reported to be 1024; a value of 32768
3158 is said to work. Smaller values may also work.
3159
3160 On System V, if you get an error like this,
3161
3162 @example
3163 /usr/local/lib/bison.simple: In function `yyparse':
3164 /usr/local/lib/bison.simple:625: virtual memory exhausted
3165 @end example
3166
3167 @noindent
3168 that too indicates a problem with disk space, ulimit, or @code{MAXUMEM}.
3169
3170 On a System V release 4 system, make sure @file{/usr/bin} precedes
3171 @file{/usr/ucb} in @code{PATH}. The @code{cc} command in
3172 @file{/usr/ucb} uses libraries which have bugs.
3173
3174 @html
3175 </p>
3176 <hr>
3177 @end html
3178 @heading @anchor{vax-dec-ultrix}vax-dec-ultrix
3179 Don't try compiling with VAX C (@code{vcc}). It produces incorrect code
3180 in some cases (for example, when @code{alloca} is used).
3181
3182 @html
3183 </p>
3184 <hr>
3185 @end html
3186 @heading @anchor{xtensa-*-elf}xtensa-*-elf
3187
3188 This target is intended for embedded Xtensa systems using the
3189 @samp{newlib} C library. It uses ELF but does not support shared
3190 objects. Designed-defined instructions specified via the
3191 Tensilica Instruction Extension (TIE) language are only supported
3192 through inline assembly.
3193
3194 The Xtensa configuration information must be specified prior to
3195 building GCC@. The @file{gcc/config/xtensa/xtensa-config.h} header
3196 file contains the configuration information. If you created your
3197 own Xtensa configuration with the Xtensa Processor Generator, the
3198 downloaded files include a customized copy of this header file,
3199 which you can use to replace the default header file.
3200
3201 @html
3202 </p>
3203 <hr>
3204 @end html
3205 @heading @anchor{xtensa-*-linux*}xtensa-*-linux*
3206
3207 This target is for Xtensa systems running GNU/Linux. It supports ELF
3208 shared objects and the GNU C library (glibc). It also generates
3209 position-independent code (PIC) regardless of whether the
3210 @option{-fpic} or @option{-fPIC} options are used. In other
3211 respects, this target is the same as the
3212 @uref{#xtensa-*-elf,,@samp{xtensa-*-elf}} target.
3213
3214 @html
3215 </p>
3216 <hr>
3217 @end html
3218 @heading @anchor{windows}Microsoft Windows (32-bit)
3219
3220 A port of GCC 2.95.x is included with the
3221 @uref{http://www.cygwin.com/,,Cygwin environment}.
3222
3223 Current (as of early 2001) snapshots of GCC will build under Cygwin
3224 without modification.
3225
3226 @html
3227 </p>
3228 <hr>
3229 @end html
3230 @heading @anchor{os2}OS/2
3231
3232 GCC does not currently support OS/2. However, Andrew Zabolotny has been
3233 working on a generic OS/2 port with pgcc. The current code can be found
3234 at @uref{http://www.goof.com/pcg/os2/,,http://www.goof.com/pcg/os2/}.
3235
3236 An older copy of GCC 2.8.1 is included with the EMX tools available at
3237 @uref{ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/,,
3238 ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/}.
3239
3240 @html
3241 </p>
3242 <hr>
3243 @end html
3244 @heading @anchor{older}Older systems
3245
3246 GCC contains support files for many older (1980s and early
3247 1990s) Unix variants. For the most part, support for these systems
3248 has not been deliberately removed, but it has not been maintained for
3249 several years and may suffer from bitrot.
3250
3251 Starting with GCC 3.1, each release has a list of ``obsoleted'' systems.
3252 Support for these systems is still present in that release, but
3253 @command{configure} will fail unless the @option{--enable-obsolete}
3254 option is given. Unless a maintainer steps forward, support for these
3255 systems will be removed from the next release of GCC@.
3256
3257 Support for old systems as hosts for GCC can cause problems if the
3258 workarounds for compiler, library and operating system bugs affect the
3259 cleanliness or maintainability of the rest of GCC@. In some cases, to
3260 bring GCC up on such a system, if still possible with current GCC, may
3261 require first installing an old version of GCC which did work on that
3262 system, and using it to compile a more recent GCC, to avoid bugs in the
3263 vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
3264 @file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror
3265 sites}. Header bugs may generally be avoided using
3266 @command{fixincludes}, but bugs or deficiencies in libraries and the
3267 operating system may still cause problems.
3268
3269 Support for older systems as targets for cross-compilation is less
3270 problematic than support for them as hosts for GCC; if an enthusiast
3271 wishes to make such a target work again (including resurrecting any of
3272 the targets that never worked with GCC 2, starting from the last CVS
3273 version before they were removed), patches
3274 @uref{../contribute.html,,following the usual requirements} would be
3275 likely to be accepted, since they should not affect the support for more
3276 modern targets.
3277
3278 For some systems, old versions of GNU binutils may also be useful,
3279 and are available from @file{pub/binutils/old-releases} on
3280 @uref{http://sources.redhat.com/mirrors.html,,sources.redhat.com mirror sites}.
3281
3282 Some of the information on specific systems above relates to
3283 such older systems, but much of the information
3284 about GCC on such systems (which may no longer be applicable to
3285 current GCC) is to be found in the GCC texinfo manual.
3286
3287 @html
3288 </p>
3289 <hr>
3290 @end html
3291 @heading @anchor{elf_targets}all ELF targets (SVR4, Solaris 2, etc.)
3292
3293 C++ support is significantly better on ELF targets if you use the
3294 @uref{./configure.html#with-gnu-ld,,GNU linker}; duplicate copies of
3295 inlines, vtables and template instantiations will be discarded
3296 automatically.
3297
3298
3299 @html
3300 </p>
3301 <hr>
3302 <p>
3303 @end html
3304 @ifhtml
3305 @uref{./index.html,,Return to the GCC Installation page}
3306 @end ifhtml
3307 @end ifset
3308
3309 @c ***Old documentation******************************************************
3310 @ifset oldhtml
3311 @include install-old.texi
3312 @html
3313 </p>
3314 <hr>
3315 <p>
3316 @end html
3317 @ifhtml
3318 @uref{./index.html,,Return to the GCC Installation page}
3319 @end ifhtml
3320 @end ifset
3321
3322 @c ***GFDL********************************************************************
3323 @ifset gfdlhtml
3324 @include fdl.texi
3325 @html
3326 </p>
3327 <hr>
3328 <p>
3329 @end html
3330 @ifhtml
3331 @uref{./index.html,,Return to the GCC Installation page}
3332 @end ifhtml
3333 @end ifset
3334
3335 @c ***************************************************************************
3336 @c Part 6 The End of the Document
3337 @ifinfo
3338 @comment node-name, next, previous, up
3339 @node Concept Index, , GNU Free Documentation License, Top
3340 @end ifinfo
3341
3342 @ifinfo
3343 @unnumbered Concept Index
3344
3345 @printindex cp
3346
3347 @contents
3348 @end ifinfo
3349 @bye