1 \input texinfo.tex @c -*-texinfo-*-
4 @setfilename gccinstall.info
5 @settitle Installing GCC
10 @c Specify title for specific html page
12 @settitle Installing GCC
15 @settitle Host/Target specific installation notes for GCC
18 @settitle Downloading GCC
21 @settitle Installing GCC: Configuration
24 @settitle Installing GCC: Building
27 @settitle Installing GCC: Testing
29 @ifset finalinstallhtml
30 @settitle Installing GCC: Final installation
33 @settitle Installing GCC: Binaries
36 @settitle Installing GCC: Old documentation
39 @settitle Installing GCC: GNU Free Documentation License
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
46 @c Include everything if we're not making html
60 @c Part 2 Summary Description and Copyright
62 Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
63 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
65 Permission is granted to copy, distribute and/or modify this document
66 under the terms of the GNU Free Documentation License, Version 1.2 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}''.
73 (a) The FSF's Front-Cover Text is:
77 (b) The FSF's Back-Cover Text is:
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.
87 @c Part 3 Titlepage and Copyright
90 @comment The title is printed in a large font.
91 @center @titlefont{Installing GCC}
93 @c The following two commands start the copyright page.
95 @vskip 0pt plus 1filll
99 @c Part 4 Top node and Master Menu
102 @comment node-name, next, Previous, up
105 * Installing GCC:: This document describes the generic installation
106 procedure for GCC as well as detailing some target
107 specific installation instructions.
109 * Specific:: Host/target specific installation notes for GCC.
110 * Binaries:: Where to get pre-compiled binaries.
112 * Old:: Old installation documentation.
114 * GNU Free Documentation License:: How you can copy and share this manual.
115 * Concept Index:: This index has two entries.
119 @c Part 5 The Body of the Document
120 @c ***Installing GCC**********************************************************
122 @comment node-name, next, previous, up
123 @node Installing GCC, Binaries, , Top
127 @chapter Installing GCC
130 The latest version of this document is always available at
131 @uref{http://gcc.gnu.org/install/,,http://gcc.gnu.org/install/}.
133 This document describes the generic installation procedure for GCC as well
134 as detailing some target specific installation instructions.
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.
140 @emph{Before} starting the build/install procedure please check the
142 @ref{Specific, host/target specific installation notes}.
145 @uref{specific.html,,host/target specific installation notes}.
147 We recommend you browse the entire generic installation instructions before
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.
154 The installation procedure itself is broken into five steps.
158 * Downloading the source::
161 * Testing:: (optional)
168 @uref{download.html,,Downloading the source}
170 @uref{configure.html,,Configuration}
172 @uref{build.html,,Building}
174 @uref{test.html,,Testing} (optional)
176 @uref{finalinstall.html,,Final install}
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.
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.
198 @uref{./index.html,,Return to the GCC Installation page}
204 @c ***Downloading the source**************************************************
206 @comment node-name, next, previous, up
207 @node Downloading the source, Configuration, , Installing GCC
211 @chapter Downloading GCC
213 @cindex Downloading GCC
214 @cindex Downloading the Source
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
221 Please refer to our @uref{http://gcc.gnu.org/releases.html,,releases web page}
222 for information on how to obtain GCC@.
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.
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).
236 Unpack the core distribution as well as any language specific
237 distributions in the same directory.
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.
252 @uref{./index.html,,Return to the GCC Installation page}
256 @c ***Configuration***********************************************************
258 @comment node-name, next, previous, up
259 @node Configuration, Building, Downloading the source, Installing GCC
263 @chapter Installing GCC: Configuration
265 @cindex Configuration
266 @cindex Installing GCC: Configuration
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.
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.
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.
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 @samp{amq -w}, during the configuration and build
287 First, we @strong{highly} recommend that GCC be built into a
288 separate directory than the sources which does @strong{not} reside
289 within the source tree. This is how we generally build GCC; building
290 where @var{srcdir} == @var{objdir} should still work, but doesn't
291 get extensive testing; building where @var{objdir} is a subdirectory
292 of @var{srcdir} is unsupported.
294 If you have previously built GCC in the same directory for a
295 different target machine, do @samp{make distclean} to delete all files
296 that might be invalid. One of the files this deletes is @file{Makefile};
297 if @samp{make distclean} complains that @file{Makefile} does not exist
298 or issues a message like ``don't know how to make distclean'' it probably
299 means that the directory is already suitably clean. However, with the
300 recommended method of building in a separate @var{objdir}, you should
301 simply use a different @var{objdir} for each target.
303 Second, when configuring a native system, either @command{cc} or
304 @command{gcc} must be in your path or you must set @env{CC} in
305 your environment before running configure. Otherwise the configuration
308 Note that the bootstrap compiler and the resulting GCC must be link
309 compatible, else the bootstrap will fail with linker errors about
310 incompatible object file formats. Several multilibed targets are
311 affected by this requirement, see
313 @ref{Specific, host/target specific installation notes}.
316 @uref{specific.html,,host/target specific installation notes}.
324 % @var{srcdir}/configure [@var{options}] [@var{target}]
328 @heading Target specification
331 GCC has code to correctly determine the correct value for @var{target}
332 for nearly all native systems. Therefore, we highly recommend you not
333 provide a configure target when configuring a native compiler.
336 @var{target} must be specified as @option{--target=@var{target}}
337 when configuring a cross compiler; examples of valid targets would be
338 i960-rtems, m68k-coff, sh-elf, etc.
341 Specifying just @var{target} instead of @option{--target=@var{target}}
342 implies that the host defaults to @var{target}.
346 @heading Options specification
348 Use @var{options} to override several configure time options for
349 GCC@. A list of supported @var{options} follows; @samp{configure
350 --help} may list other options, but those not listed below may not
351 work and should not normally be used.
354 @item --prefix=@var{dirname}
355 Specify the toplevel installation
356 directory. This is the recommended way to install the tools into a directory
357 other than the default. The toplevel installation directory defaults to
360 We @strong{highly} recommend against @var{dirname} being the same or a
361 subdirectory of @var{objdir} or vice versa. If specifying a directory
362 beneath a user's home directory tree, some shells will not expand
363 @var{dirname} correctly if it contains the @samp{~} metacharacter; use
366 These additional options control where certain parts of the distribution
367 are installed. Normally you should not need to use these options.
369 @item --exec-prefix=@var{dirname}
370 Specify the toplevel installation directory for architecture-dependent
371 files. The default is @file{@var{prefix}}.
373 @item --bindir=@var{dirname}
374 Specify the installation directory for the executables called by users
375 (such as @command{gcc} and @command{g++}). The default is
376 @file{@var{exec-prefix}/bin}.
378 @item --libdir=@var{dirname}
379 Specify the installation directory for object code libraries and
380 internal parts of GCC@. The default is @file{@var{exec-prefix}/lib}.
382 @item --with-slibdir=@var{dirname}
383 Specify the installation directory for the shared libgcc library. The
384 default is @file{@var{libdir}}.
386 @item --infodir=@var{dirname}
387 Specify the installation directory for documentation in info format.
388 The default is @file{@var{prefix}/info}.
390 @item --datadir=@var{dirname}
391 Specify the installation directory for some architecture-independent
392 data files referenced by GCC@. The default is @file{@var{prefix}/share}.
394 @item --mandir=@var{dirname}
395 Specify the installation directory for manual pages. The default is
396 @file{@var{prefix}/man}. (Note that the manual pages are only extracts from
397 the full GCC manuals, which are provided in Texinfo format. The
398 @command{g77} manpage is unmaintained and may be out of date; the others
399 are derived by an automatic conversion process from parts of the full
402 @item --with-gxx-include-dir=@var{dirname}
404 the installation directory for G++ header files. The default is
405 @file{@var{prefix}/include/g++-v3}.
409 @item --program-prefix=@var{prefix}
410 GCC supports some transformations of the names of its programs when
411 installing them. This option prepends @var{prefix} to the names of
412 programs to install in @var{bindir} (see above). For example, specifying
413 @option{--program-prefix=foo-} would result in @samp{gcc}
414 being installed as @file{/usr/local/bin/foo-gcc}.
416 @item --program-suffix=@var{suffix}
417 Appends @var{suffix} to the names of programs to install in @var{bindir}
418 (see above). For example, specifying @option{--program-suffix=-3.1}
419 would result in @samp{gcc} being installed as
420 @file{/usr/local/bin/gcc-3.1}.
422 @item --program-transform-name=@var{pattern}
423 Applies the @samp{sed} script @var{pattern} to be applied to the names
424 of programs to install in @var{bindir} (see above). @var{pattern} has to
425 consist of one or more basic @samp{sed} editing commands, separated by
426 semicolons. For example, if you want the @samp{gcc} program name to be
427 transformed to the installed program @file{/usr/local/bin/myowngcc} and
428 the @samp{g++} program name to be transformed to
429 @file{/usr/local/bin/gspecial++} without changing other program names,
430 you could use the pattern
431 @option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'}
432 to achieve this effect.
434 All three options can be combined and used together, resulting in more
435 complex conversion patterns. As a basic rule, @var{prefix} (and
436 @var{suffix}) are prepended (appended) before further transformations
437 can happen with a special transformation script @var{pattern}.
439 As currently implemented, this option only takes effect for native
440 builds; cross compiler binaries' names are not transformed even when a
441 transformation is explicitly asked for by one of these options.
443 For native builds, some of the installed programs are also installed
444 with the target alias in front of their name, as in
445 @samp{i686-pc-linux-gnu-gcc}. All of the above transformations happen
446 before the target alias is prepended to the name - so, specifying
447 @option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the
448 resulting binary would be installed as
449 @file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}.
451 As a last shortcoming, none of the installed Ada programs are
452 transformed yet, which will be fixed in some time.
454 @item --with-local-prefix=@var{dirname}
456 installation directory for local include files. The default is
457 @file{/usr/local}. Specify this option if you want the compiler to
458 search directory @file{@var{dirname}/include} for locally installed
459 header files @emph{instead} of @file{/usr/local/include}.
461 You should specify @option{--with-local-prefix} @strong{only} if your
462 site has a different convention (not @file{/usr/local}) for where to put
465 The default value for @option{--with-local-prefix} is @file{/usr/local}
466 regardless of the value of @option{--prefix}. Specifying
467 @option{--prefix} has no effect on which directory GCC searches for
468 local header files. This may seem counterintuitive, but actually it is
471 The purpose of @option{--prefix} is to specify where to @emph{install
472 GCC}. The local header files in @file{/usr/local/include}---if you put
473 any in that directory---are not part of GCC@. They are part of other
474 programs---perhaps many others. (GCC installs its own header files in
475 another directory which is based on the @option{--prefix} value.)
477 Both the local-prefix include directory and the GCC-prefix include
478 directory are part of GCC's "system include" directories. Although these
479 two directories are not fixed, they need to be searched in the proper
480 order for the correct processing of the include_next directive. The
481 local-prefix include directory is searched before the GCC-prefix
482 include directory. Another characteristic of system include directories
483 is that pedantic warnings are turned off for headers in these directories.
485 Some autoconf macros add @option{-I @var{directory}} options to the
486 compiler command line, to ensure that directories containing installed
487 packages' headers are searched. When @var{directory} is one of GCC's
488 system include directories, GCC will ignore the option so that system
489 directories continue to be processed in the correct order. This
490 may result in a search order different from what was specified but the
491 directory will still be searched.
493 GCC automatically searches for ordinary libraries using
494 @env{GCC_EXEC_PREFIX}. Thus, when the same installation prefix is
495 used for both GCC and packages, GCC will automatically search for
496 both headers and libraries. This provides a configuration that is
497 easy to use. GCC behaves in a manner similar to that when it is
498 installed as a system compiler in @file{/usr}.
500 Sites that need to install multiple versions of GCC may not want to
501 use the above simple configuration. It is possible to use the
502 @option{--program-prefix}, @option{--program-suffix} and
503 @option{--program-transform-name} options to install multiple versions
504 into a single directory, but it may be simpler to use different prefixes
505 and the @option{--with-local-prefix} option to specify the location of the
506 site-specific files for each version. It will then be necessary for
507 users to specify explicitly the location of local site libraries
508 (e.g., with @env{LIBRARY_PATH}).
510 The same value can be used for both @option{--with-local-prefix} and
511 @option{--prefix} provided it is not @file{/usr}. This can be used
512 to avoid the default search of @file{/usr/local/include}.
514 @strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}!
515 The directory you use for @option{--with-local-prefix} @strong{must not}
516 contain any of the system's standard header files. If it did contain
517 them, certain programs would be miscompiled (including GNU Emacs, on
518 certain targets), because this would override and nullify the header
519 file corrections made by the @command{fixincludes} script.
521 Indications are that people who use this option use it based on mistaken
522 ideas of what it is for. People use it as if it specified where to
523 install part of GCC@. Perhaps they make this assumption because
524 installing GCC creates the directory.
526 @item --enable-shared[=@var{package}[,@dots{}]]
527 Build shared versions of libraries, if shared libraries are supported on
528 the target platform. Unlike GCC 2.95.x and earlier, shared libraries
529 are enabled by default on all platforms that support shared libraries,
530 except for @samp{libobjc} which is built as a static library only by
533 If a list of packages is given as an argument, build shared libraries
534 only for the listed packages. For other packages, only static libraries
535 will be built. Package names currently recognized in the GCC tree are
536 @samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not
537 @samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc} and
538 @samp{libjava}. Note that @samp{libobjc} does not recognize itself by
539 any name, so, if you list package names in @option{--enable-shared},
540 you will only get static Objective-C libraries. @samp{libf2c} and
541 @samp{libiberty} do not support shared libraries at all.
543 Use @option{--disable-shared} to build only static libraries. Note that
544 @option{--disable-shared} does not accept a list of package names as
545 argument, only @option{--enable-shared} does.
547 @item @anchor{with-gnu-as}--with-gnu-as
548 Specify that the compiler should assume that the
549 assembler it finds is the GNU assembler. However, this does not modify
550 the rules to find an assembler and will result in confusion if the
551 assembler found is not actually the GNU assembler. (Confusion may also
552 result if the compiler finds the GNU assembler but has not been
553 configured with @option{--with-gnu-as}.) If you have more than one
554 assembler installed on your system, you may want to use this option in
555 connection with @option{--with-as=@var{pathname}}.
557 The following systems are the only ones where it makes a difference
558 whether you use the GNU assembler. On any other system,
559 @option{--with-gnu-as} has no effect.
562 @item @samp{hppa1.0-@var{any}-@var{any}}
563 @item @samp{hppa1.1-@var{any}-@var{any}}
564 @item @samp{i386-@var{any}-sysv}
565 @item @samp{m68k-bull-sysv}
566 @item @samp{m68k-hp-hpux}
567 @item @samp{m68000-hp-hpux}
568 @item @samp{m68000-att-sysv}
569 @item @samp{@var{any}-lynx-lynxos}
570 @item @samp{mips-@var{any}}
573 On the systems listed above (except for the HP-PA, for ISC on the
574 386, and for @samp{mips-sgi-irix5.*}), if you use the GNU assembler,
575 you should also use the GNU linker (and specify @option{--with-gnu-ld}).
577 @item --with-as=@var{pathname}
579 compiler should use the assembler pointed to by @var{pathname}, rather
580 than the one found by the standard rules to find an assembler, which
585 @file{@var{exec_prefix}/lib/gcc-lib/@var{target}/@var{version}}
586 directory, where @var{exec_prefix} defaults to @var{prefix} which
587 defaults to @file{/usr/local} unless overridden by the
588 @option{--prefix=@var{pathname}} switch described above. @var{target} is the
589 target system triple, such as @samp{sparc-sun-solaris2.7}, and
590 @var{version} denotes the GCC version, such as 3.0.
592 Check operating system specific directories (e.g.@: @file{/usr/ccs/bin} on
595 Note that these rules do not check for the value of @env{PATH}. You may
596 want to use @option{--with-as} if no assembler is installed in the
597 directories listed above, or if you have multiple assemblers installed
598 and want to choose one that is not found by the above rules.
600 @item @anchor{with-gnu-ld}--with-gnu-ld
601 Same as @uref{#with-gnu-as,,@option{--with-gnu-as}}
605 @item --with-ld=@var{pathname}
607 @option{--with-as}, but for the linker.
610 Specify that stabs debugging
611 information should be used instead of whatever format the host normally
612 uses. Normally GCC uses the same debug format as the host system.
614 On MIPS based systems and on Alphas, you must specify whether you want
615 GCC to create the normal ECOFF debugging format, or to use BSD-style
616 stabs passed through the ECOFF symbol table. The normal ECOFF debug
617 format cannot fully handle languages other than C@. BSD stabs format can
618 handle other languages, but it only works with the GNU debugger GDB@.
620 Normally, GCC uses the ECOFF debugging format by default; if you
621 prefer BSD stabs, specify @option{--with-stabs} when you configure GCC@.
623 No matter which default you choose when you configure GCC, the user
624 can use the @option{-gcoff} and @option{-gstabs+} options to specify explicitly
625 the debug format for a particular compilation.
627 @option{--with-stabs} is meaningful on the ISC system on the 386, also, if
628 @option{--with-gas} is used. It selects use of stabs debugging
629 information embedded in COFF output. This kind of debugging information
630 supports C++ well; ordinary COFF debugging information does not.
632 @option{--with-stabs} is also meaningful on 386 systems running SVR4. It
633 selects use of stabs debugging information embedded in ELF output. The
634 C++ compiler currently (2.6.0) does not support the DWARF debugging
635 information normally used on 386 SVR4 platforms; stabs provide a
636 workable alternative. This requires gas and gdb, as the normal SVR4
637 tools can not generate or interpret stabs.
639 @item --disable-multilib
640 Specify that multiple target
641 libraries to support different target variants, calling
642 conventions, etc should not be built. The default is to build a
643 predefined set of them.
645 Some targets provide finer-grained control over which multilibs are built
646 (e.g., @option{--disable-softfloat}):
652 fpu, 26bit, underscore, interwork, biendian, nofmult.
655 softfloat, m68881, m68000, m68020.
658 single-float, biendian, softfloat.
660 @item powerpc*-*-*, rs6000*-*-*
661 aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian,
666 @item --enable-threads
667 Specify that the target
668 supports threads. This affects the Objective-C compiler and runtime
669 library, and exception handling for other languages like C++ and Java.
670 On some systems, this is the default.
672 In general, the best (and, in many cases, the only known) threading
673 model available will be configured for use. Beware that on some
674 systems, gcc has not been taught what threading models are generally
675 available for the system. In this case, @option{--enable-threads} is an
676 alias for @option{--enable-threads=single}.
678 @item --disable-threads
679 Specify that threading support should be disabled for the system.
680 This is an alias for @option{--enable-threads=single}.
682 @item --enable-threads=@var{lib}
684 @var{lib} is the thread support library. This affects the Objective-C
685 compiler and runtime library, and exception handling for other languages
686 like C++ and Java. The possibilities for @var{lib} are:
694 Ada tasking support. For non-Ada programs, this setting is equivalent
695 to @samp{single}. When used in conjunction with the Ada run time, it
696 causes GCC to use the same thread primitives as Ada uses. This option
697 is necessary when using both Ada and the back end exception handling,
698 which is the default for most Ada targets.
700 Generic MACH thread support, known to work on NeXTSTEP@. (Please note
701 that the file needed to support this configuration, @file{gthr-mach.h}, is
702 missing and thus this setting will cause a known bootstrap failure.)
704 This is an alias for @samp{single}.
706 Generic POSIX thread support.
708 Same as @samp{posix} on arm*-*-linux*, *-*-chorusos* and *-*-freebsd*
709 only. A future release of gcc might remove this alias or extend it
712 RTEMS thread support.
714 Disable thread support, should work for all platforms.
716 Sun Solaris 2 thread support.
718 VxWorks thread support.
720 Microsoft Win32 API thread support.
723 @item --with-cpu=@var{cpu}
724 Specify which cpu variant the
725 compiler should generate code for by default. This is currently
726 only supported on some ports, specifically arm, powerpc, and
727 SPARC@. If configure does not recognize the model name (e.g.@: arm700,
728 603e, or ultrasparc) you provide, please check the
729 @file{gcc/config.gcc} script for a complete list of supported models.
731 @item --enable-altivec
732 Specify that the target supports AltiVec vector enhancements. This
733 option will adjust the ABI for AltiVec enhancements, as well as generate
734 AltiVec code when appropriate. This option is only available for
737 @item --enable-target-optspace
739 libraries should be optimized for code space instead of code speed.
740 This is the default for the m32r platform.
743 Specify that a user visible @command{cpp} program should not be installed.
745 @item --with-cpp-install-dir=@var{dirname}
746 Specify that the user visible @command{cpp} program should be installed
747 in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}.
749 @item --enable-initfini-array
750 Force the use of sections @code{.init_array} and @code{.fini_array}
751 (instead of @code{.init} and @code{.fini}) for constructors and
752 destructors. Option @option{--disable-initfini-array} has the
753 opposite effect. If neither option is specified, the configure script
754 will try to guess whether the @code{.init_array} and
755 @code{.fini_array} sections are supported and, if they are, use them.
757 @item --enable-maintainer-mode
759 regenerate the GCC master message catalog @file{gcc.pot} are normally
760 disabled. This is because it can only be rebuilt if the complete source
761 tree is present. If you have changed the sources and want to rebuild the
762 catalog, configuring with @option{--enable-maintainer-mode} will enable
763 this. Note that you need a recent version of the @code{gettext} tools
766 @item --enable-version-specific-runtime-libs
768 that runtime libraries should be installed in the compiler specific
769 subdirectory (@file{@var{libsubdir}}) rather than the usual places. In
770 addition, @samp{libstdc++}'s include files will be installed in
771 @file{@var{libsubdir}/include/g++} unless you overruled it by using
772 @option{--with-gxx-include-dir=@var{dirname}}. Using this option is
773 particularly useful if you intend to use several versions of GCC in
774 parallel. This is currently supported by @samp{libf2c} and
775 @samp{libstdc++}, and is the default for @samp{libobjc} which cannot be
776 changed in this case.
778 @item --enable-languages=@var{lang1},@var{lang2},@dots{}
779 Specify that only a particular subset of compilers and
780 their runtime libraries should be built. For a list of valid values for
781 @var{langN} you can issue the following command in the
782 @file{gcc} directory of your GCC source tree:@*
784 grep language= */config-lang.in
786 Currently, you can use any of the following:
787 @code{ada}, @code{c}, @code{c++}, @code{f77}, @code{java}, @code{objc}.
788 Building the Ada compiler has special requirements, see below.@*
789 If you do not pass this flag, all languages available in the @file{gcc}
790 sub-tree will be configured. Re-defining @code{LANGUAGES} when calling
791 @samp{make bootstrap} @strong{does not} work anymore, as those
792 language sub-directories might not have been configured!
794 @item --disable-libgcj
795 Specify that the run-time libraries
796 used by GCJ should not be built. This is useful in case you intend
797 to use GCJ with some other run-time, or you're going to install it
798 separately, or it just happens not to build on your particular
799 machine. In general, if the Java front end is enabled, the GCJ
800 libraries will be enabled too, unless they're known to not work on
801 the target platform. If GCJ is enabled but @samp{libgcj} isn't built, you
802 may need to port it; in this case, before modifying the top-level
803 @file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
804 you may use @option{--enable-libgcj} to override the default.
807 Specify that the compiler should
808 use DWARF 2 debugging information as the default.
810 @item --enable-win32-registry
811 @itemx --enable-win32-registry=@var{key}
812 @itemx --disable-win32-registry
813 The @option{--enable-win32-registry} option enables Windows-hosted GCC
814 to look up installations paths in the registry using the following key:
817 @code{HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\@var{key}}
820 @var{key} defaults to GCC version number, and can be overridden by the
821 @option{--enable-win32-registry=@var{key}} option. Vendors and distributors
822 who use custom installers are encouraged to provide a different key,
823 perhaps one comprised of vendor name and GCC version number, to
824 avoid conflict with existing installations. This feature is enabled
825 by default, and can be disabled by @option{--disable-win32-registry}
826 option. This option has no effect on the other hosts.
829 Specify that the machine does not have a floating point unit. This
830 option only applies to @samp{m68k-sun-sunos@var{n}}. On any other
831 system, @option{--nfp} has no effect.
833 @item --enable-werror
834 @itemx --disable-werror
835 @itemx --enable-werror=yes
836 @itemx --enable-werror=no
837 When you specify this option, it controls whether certain files in the
838 compiler are built with @option{-Werror} in bootstrap stage2 and later.
839 If you don't specify it, @option{-Werror} is turned on for the main
840 development trunk. However it defaults to off for release branches and
841 final releases. The specific files which get @option{-Werror} are
842 controlled by the Makefiles.
844 @item --enable-checking
845 @itemx --enable-checking=@var{list}
846 When you specify this option, the compiler is built to perform checking
847 of tree node types when referencing fields of that node, and some other
848 internal consistency checks. This does not change the generated code,
849 but adds error checking within the compiler. This will slow down the
850 compiler and may only work properly if you are building the compiler
851 with GCC@. This is on by default when building from CVS or snapshots,
852 but off for releases. More control over the checks may be had by
853 specifying @var{list}; the categories of checks available are
854 @samp{misc}, @samp{tree}, @samp{gc}, @samp{rtl}, @samp{rtlflag} and
856 default when @var{list} is not specified is @samp{misc,tree,gc,rtlflag}; the
857 checks @samp{rtl} and @samp{gcac} are very expensive.
859 @item --enable-coverage
860 @item --enable-coverage=@var{level}
861 With this option, the compiler is built to collect self coverage
862 information, every time it is run. This is for internal development
863 purposes, and only works when the compiler is being built with gcc. The
864 @var{level} argument controls whether the compiler is built optimized or
865 not, values are @samp{opt} and @samp{noopt}. For coverage analysis you
866 want to disable optimization, for performance analysis you want to
867 enable optimization. When coverage is enabled, the default level is
868 without optimization.
872 The @option{--enable-nls} option enables Native Language Support (NLS),
873 which lets GCC output diagnostics in languages other than American
874 English. Native Language Support is enabled by default if not doing a
875 canadian cross build. The @option{--disable-nls} option disables NLS@.
877 @item --with-included-gettext
878 If NLS is enabled, the @option{--with-included-gettext} option causes the build
879 procedure to prefer its copy of GNU @command{gettext}.
882 If NLS is enabled, and if the host lacks @code{gettext} but has the
883 inferior @code{catgets} interface, the GCC build procedure normally
884 ignores @code{catgets} and instead uses GCC's copy of the GNU
885 @code{gettext} library. The @option{--with-catgets} option causes the
886 build procedure to use the host's @code{catgets} in this situation.
888 @item --with-libiconv-prefix=@var{dir}
889 Search for libiconv header files in @file{@var{dir}/include} and
890 libiconv library files in @file{@var{dir}/lib}.
892 @item --with-system-zlib
893 Use installed zlib rather than that included with GCC@. This option
894 only applies if the Java front end is being built.
896 @item --enable-obsolete
897 Enable configuration for an obsoleted system. If you attempt to
898 configure GCC for a system (build, host, or target) which has been
899 obsoleted, and you do not specify this flag, configure will halt with an
902 All support for systems which have been obsoleted in one release of GCC
903 is removed entirely in the next major release, unless someone steps
904 forward to maintain the port.
907 Some options which only apply to building cross compilers:
910 @itemx --with-sysroot=@var{dir}
911 Tells GCC to consider @var{dir} as the root of a tree that contains a
912 (subset of) the root filesystem of the target operating system.
913 Target system headers, libraries and run-time object files will be
914 searched in there. The specified directory is not copied into the
915 install tree, unlike the options @option{--with-headers} and
916 @option{--with-libs} that this option obsoletes. The default value,
917 in case @option{--with-sysroot} is not given an argument, is
918 @option{$@{gcc_tooldir@}/sys-root}. If the specified directory is a
919 subdirectory of @option{$@{exec_prefix@}}, then it will be found relative to
920 the GCC binaries if the installation tree is moved.
923 @itemx --with-headers=@var{dir}
924 Deprecated in favor of @option{--with-sysroot}.
925 Specifies that target headers are available when building a cross compiler.
926 The @var{dir} argument specifies a directory which has the target include
927 files. These include files will be copied into the @file{gcc} install
928 directory. @emph{This option with the @var{dir} argument is required} when
929 building a cross compiler, if @file{@var{prefix}/@var{target}/sys-include}
930 doesn't pre-exist. If @file{@var{prefix}/@var{target}/sys-include} does
931 pre-exist, the @var{dir} argument may be omitted. @command{fixincludes}
932 will be run on these files to make them compatible with GCC.
934 @itemx --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
935 Deprecated in favor of @option{--with-sysroot}.
936 Specifies a list of directories which contain the target runtime
937 libraries. These libraries will be copied into the @file{gcc} install
938 directory. If the directory list is omitted, this option has no
941 Specifies that @samp{newlib} is
942 being used as the target C library. This causes @code{__eprintf} to be
943 omitted from @file{libgcc.a} on the assumption that it will be provided by
947 Note that each @option{--enable} option has a corresponding
948 @option{--disable} option and that each @option{--with} option has a
949 corresponding @option{--without} option.
956 @uref{./index.html,,Return to the GCC Installation page}
960 @c ***Building****************************************************************
962 @comment node-name, next, previous, up
963 @node Building, Testing, Configuration, Installing GCC
969 @cindex Installing GCC: Building
971 Now that GCC is configured, you are ready to build the compiler and
974 We @strong{highly} recommend that GCC be built using GNU make;
975 other versions may work, then again they might not.
976 GNU make is required for compiling GNAT (the Ada compiler) and the Java
979 (For example, many broken versions of make will fail if you use the
980 recommended setup where @var{objdir} is different from @var{srcdir}.
981 Other broken versions may recompile parts of the compiler when
982 installing the compiler.)
984 Some commands executed when making the compiler may fail (return a
985 nonzero status) and be ignored by @command{make}. These failures, which
986 are often due to files that were not found, are expected, and can safely
989 It is normal to have compiler warnings when compiling certain files.
990 Unless you are a GCC developer, you can generally ignore these warnings
991 unless they cause compilation to fail. Developers should attempt to fix
992 any warnings encountered, however they can temporarily continue past
993 warnings-as-errors by specifying the configure flag
994 @option{--disable-werror}.
996 On certain old systems, defining certain environment variables such as
997 @env{CC} can interfere with the functioning of @command{make}.
999 If you encounter seemingly strange errors when trying to build the
1000 compiler in a directory other than the source directory, it could be
1001 because you have previously configured the compiler in the source
1002 directory. Make sure you have done all the necessary preparations.
1004 If you build GCC on a BSD system using a directory stored in an old System
1005 V file system, problems may occur in running @command{fixincludes} if the
1006 System V file system doesn't support symbolic links. These problems
1007 result in a failure to fix the declaration of @code{size_t} in
1008 @file{sys/types.h}. If you find that @code{size_t} is a signed type and
1009 that type mismatches occur, this could be the cause.
1011 The solution is not to use such a directory for building GCC@.
1013 When building from CVS or snapshots, or if you modify parser sources,
1014 you need the Bison parser generator installed. Any version 1.25 or
1015 later should work; older versions may also work. If you do not modify
1016 parser sources, releases contain the Bison-generated files and you do
1017 not need Bison installed to build them.
1019 When building from CVS or snapshots, or if you modify Texinfo
1020 documentation, you need version 4.2 or later of Texinfo installed if you
1021 want Info documentation to be regenerated. Releases contain Info
1022 documentation pre-built for the unmodified documentation in the release.
1024 @section Building a native compiler
1026 For a native build issue the command @samp{make bootstrap}. This
1027 will build the entire GCC system, which includes the following steps:
1031 Build host tools necessary to build the compiler such as texinfo, bison,
1035 Build target tools for use by the compiler such as binutils (bfd,
1036 binutils, gas, gprof, ld, and opcodes)
1037 if they have been individually linked
1038 or moved into the top level GCC source tree before configuring.
1041 Perform a 3-stage bootstrap of the compiler.
1044 Perform a comparison test of the stage2 and stage3 compilers.
1047 Build runtime libraries using the stage3 compiler from the previous step.
1051 If you are short on disk space you might consider @samp{make
1052 bootstrap-lean} instead. This is identical to @samp{make
1053 bootstrap} except that object files from the stage1 and
1054 stage2 of the 3-stage bootstrap of the compiler are deleted as
1055 soon as they are no longer needed.
1057 If you want to save additional space during the bootstrap and in
1058 the final installation as well, you can build the compiler binaries
1059 without debugging information as in the following example. This will save
1060 roughly 40% of disk space both for the bootstrap and the final installation.
1061 (Libraries will still contain debugging information.)
1064 make CFLAGS='-O' LIBCFLAGS='-g -O2' \
1065 LIBCXXFLAGS='-g -O2 -fno-implicit-templates' bootstrap
1068 If you wish to use non-default GCC flags when compiling the stage2 and
1069 stage3 compilers, set @code{BOOT_CFLAGS} on the command line when doing
1070 @samp{make bootstrap}. Non-default optimization flags are less well
1071 tested here than the default of @samp{-g -O2}, but should still work.
1072 In a few cases, you may find that you need to specify special flags such
1073 as @option{-msoft-float} here to complete the bootstrap; or, if the
1074 native compiler miscompiles the stage1 compiler, you may need to work
1075 around this, by choosing @code{BOOT_CFLAGS} to avoid the parts of the
1076 stage1 compiler that were miscompiled, or by using @samp{make
1077 bootstrap4} to increase the number of stages of bootstrap.
1079 If you used the flag @option{--enable-languages=@dots{}} to restrict
1080 the compilers to be built, only those you've actually enabled will be
1081 built. This will of course only build those runtime libraries, for
1082 which the particular compiler has been built. Please note,
1083 that re-defining @env{LANGUAGES} when calling @samp{make bootstrap}
1084 @strong{does not} work anymore!
1086 If the comparison of stage2 and stage3 fails, this normally indicates
1087 that the stage2 compiler has compiled GCC incorrectly, and is therefore
1088 a potentially serious bug which you should investigate and report. (On
1089 a few systems, meaningful comparison of object files is impossible; they
1090 always appear ``different''. If you encounter this problem, you will
1091 need to disable comparison in the @file{Makefile}.)
1093 @section Building a cross compiler
1095 We recommend reading the
1096 @uref{http://www.objsw.com/CrossGCC/,,crossgcc FAQ}
1097 for information about building cross compilers.
1099 When building a cross compiler, it is not generally possible to do a
1100 3-stage bootstrap of the compiler. This makes for an interesting problem
1101 as parts of GCC can only be built with GCC@.
1103 To build a cross compiler, we first recommend building and installing a
1104 native compiler. You can then use the native GCC compiler to build the
1105 cross compiler. The installed native compiler needs to be GCC version
1108 Assuming you have already installed a native copy of GCC and configured
1109 your cross compiler, issue the command @command{make}, which performs the
1114 Build host tools necessary to build the compiler such as texinfo, bison,
1118 Build target tools for use by the compiler such as binutils (bfd,
1119 binutils, gas, gprof, ld, and opcodes)
1120 if they have been individually linked or moved into the top level GCC source
1121 tree before configuring.
1124 Build the compiler (single stage only).
1127 Build runtime libraries using the compiler from the previous step.
1130 Note that if an error occurs in any step the make process will exit.
1132 @section Building in parallel
1134 If you have a multiprocessor system you can use @samp{make bootstrap
1135 MAKE="make -j 2" -j 2} or just @samp{make -j 2 bootstrap}
1136 for GNU Make 3.79 and above instead of just @samp{make bootstrap}
1137 when building GCC@. You can use a bigger number instead of two if
1138 you like. In most cases, it won't help to use a number bigger than
1139 the number of processors in your machine.
1141 @section Building the Ada compiler
1143 In order to build GNAT, the Ada compiler, you need a working GNAT
1144 compiler (GNAT version 3.13 or later, or GCC version 3.1 or later),
1145 since the Ada front end is written in Ada (with some
1146 GNAT-specific extensions), and GNU make.
1148 However, you do not need a full installation of GNAT, just the GNAT
1149 binary @file{gnat1}, a copy of @file{gnatbind}, and a compiler driver
1150 which can deal with Ada input (by invoking the @file{gnat1} binary).
1151 You can specify this compiler driver by setting the @env{ADAC}
1152 environment variable at the configure step. @command{configure} can
1153 detect the driver automatically if it has got a common name such as
1154 @command{gcc} or @command{gnatgcc}. Of course, you still need a working
1155 C compiler (the compiler driver can be different or not).
1156 @command{configure} does not test whether the GNAT installation works
1157 and has a sufficiently recent version; if too old a GNAT version is
1158 installed, the build will fail unless @option{--enable-languages} is
1159 used to disable building the Ada front end.
1161 Additional build tools (such as @command{gnatmake}) or a working GNAT
1162 run-time library installation are usually @emph{not} required. However,
1163 if you want to bootstrap the compiler using a minimal version of GNAT,
1164 you have to issue the following commands before invoking @samp{make
1165 bootstrap} (this assumes that you start with an unmodified and consistent
1166 source distribution):
1169 cd @var{srcdir}/gcc/ada
1170 touch treeprs.ads [es]info.h nmake.ad[bs]
1173 At the moment, the GNAT library and several tools for GNAT are not built
1174 by @samp{make bootstrap}. You have to invoke
1175 @samp{make gnatlib_and_tools} in the @file{@var{objdir}/gcc}
1176 subdirectory before proceeding with the next steps.
1178 For example, you can build a native Ada compiler by issuing the
1179 following commands (assuming @command{make} is GNU make):
1183 @var{srcdir}/configure --enable-languages=c,ada
1184 cd @var{srcdir}/gcc/ada
1185 touch treeprs.ads [es]info.h nmake.ad[bs]
1189 make gnatlib_and_tools
1193 Currently, when compiling the Ada front end, you cannot use the parallel
1194 build feature described in the previous section.
1201 @uref{./index.html,,Return to the GCC Installation page}
1205 @c ***Testing*****************************************************************
1207 @comment node-name, next, previous, up
1208 @node Testing, Final install, Building, Installing GCC
1212 @chapter Installing GCC: Testing
1215 @cindex Installing GCC: Testing
1218 Before you install GCC, we encourage you to run the testsuites and to
1219 compare your results with results from a similar configuration that have
1220 been submitted to the
1221 @uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}.
1222 Some of these archived results are linked from the build status lists
1223 at @uref{http://gcc.gnu.org/buildstat.html}, although not everyone who
1224 reports a successful build runs the testsuites and submits the results.
1225 This step is optional and may require you to download additional software,
1226 but it can give you confidence in your new GCC installation or point out
1227 problems before you install and start using your new GCC.
1229 First, you must have @uref{download.html,,downloaded the testsuites}.
1230 These are part of the full distribution, but if you downloaded the
1231 ``core'' compiler plus any front ends, you must download the testsuites
1234 Second, you must have the testing tools installed. This includes
1235 @uref{http://www.gnu.org/software/dejagnu/,,DejaGnu} 1.4.2 (or later),
1236 Tcl, and Expect; the DejaGnu site has links to these.
1238 If the directories where @command{runtest} and @command{expect} were
1239 installed are not in the @env{PATH}, you may need to set the following
1240 environment variables appropriately, as in the following example (which
1241 assumes that DejaGnu has been installed under @file{/usr/local}):
1244 TCL_LIBRARY = /usr/local/share/tcl8.0
1245 DEJAGNULIBS = /usr/local/share/dejagnu
1248 (On systems such as Cygwin, these paths are required to be actual
1249 paths, not mounts or links; presumably this is due to some lack of
1250 portability in the DejaGnu code.)
1253 Finally, you can run the testsuite (which may take a long time):
1255 cd @var{objdir}; make -k check
1258 This will test various components of GCC, such as compiler
1259 front ends and runtime libraries. While running the testsuite, DejaGnu
1260 might emit some harmless messages resembling
1261 @samp{WARNING: Couldn't find the global config file.} or
1262 @samp{WARNING: Couldn't find tool init file} that can be ignored.
1264 @section How can I run the test suite on selected tests?
1266 In order to run sets of tests selectively, there are targets
1267 @samp{make check-gcc} and @samp{make check-g++}
1268 in the @file{gcc} subdirectory of the object directory. You can also
1269 just run @samp{make check} in a subdirectory of the object directory.
1272 A more selective way to just run all @command{gcc} execute tests in the
1276 make check-gcc RUNTESTFLAGS="execute.exp @var{other-options}"
1279 Likewise, in order to run only the @command{g++} ``old-deja'' tests in
1280 the testsuite with filenames matching @samp{9805*}, you would use
1283 make check-g++ RUNTESTFLAGS="old-deja.exp=9805* @var{other-options}"
1286 The @file{*.exp} files are located in the testsuite directories of the GCC
1287 source, the most important ones being @file{compile.exp},
1288 @file{execute.exp}, @file{dg.exp} and @file{old-deja.exp}.
1289 To get a list of the possible @file{*.exp} files, pipe the
1290 output of @samp{make check} into a file and look at the
1291 @samp{Running @dots{} .exp} lines.
1294 @section Additional testing for Java Class Libraries
1296 The @uref{http://sources.redhat.com/mauve/,,Mauve Project} provides
1297 a suite of tests for the Java Class Libraries. This suite can be run
1298 as part of libgcj testing by placing the Mauve tree within the libjava
1299 testsuite at @file{libjava/testsuite/libjava.mauve/mauve}, or by
1300 specifying the location of that tree when invoking @samp{make}, as in
1301 @samp{make MAUVEDIR=~/mauve check}.
1303 @uref{http://www-124.ibm.com/developerworks/oss/cvs/jikes/~checkout~/jacks/jacks.html,,Jacks}
1304 is a free test suite that tests Java compiler front ends. This suite
1305 can be run as part of libgcj testing by placing the Jacks tree within
1306 the libjava testsuite at @file{libjava/testsuite/libjava.jacks/jacks}.
1308 @section How to interpret test results
1310 The result of running the testsuite are various @file{*.sum} and @file{*.log}
1311 files in the testsuite subdirectories. The @file{*.log} files contain a
1312 detailed log of the compiler invocations and the corresponding
1313 results, the @file{*.sum} files summarize the results. These summaries
1314 contain status codes for all tests:
1318 PASS: the test passed as expected
1320 XPASS: the test unexpectedly passed
1322 FAIL: the test unexpectedly failed
1324 XFAIL: the test failed as expected
1326 UNSUPPORTED: the test is not supported on this platform
1328 ERROR: the testsuite detected an error
1330 WARNING: the testsuite detected a possible problem
1333 It is normal for some tests to report unexpected failures. At the
1334 current time our testing harness does not allow fine grained control
1335 over whether or not a test is expected to fail. We expect to fix this
1336 problem in future releases.
1339 @section Submitting test results
1341 If you want to report the results to the GCC project, use the
1342 @file{contrib/test_summary} shell script. Start it in the @var{objdir} with
1345 @var{srcdir}/contrib/test_summary -p your_commentary.txt \
1346 -m gcc-testresults@@gcc.gnu.org |sh
1349 This script uses the @command{Mail} program to send the results, so
1350 make sure it is in your @env{PATH}. The file @file{your_commentary.txt} is
1351 prepended to the testsuite summary and should contain any special
1352 remarks you have on your results or your build environment. Please
1353 do not edit the testsuite result block or the subject line, as these
1354 messages may be automatically processed.
1361 @uref{./index.html,,Return to the GCC Installation page}
1365 @c ***Final install***********************************************************
1367 @comment node-name, next, previous, up
1368 @node Final install, , Testing, Installing GCC
1370 @ifset finalinstallhtml
1372 @chapter Installing GCC: Final installation
1375 Now that GCC has been built (and optionally tested), you can install it with
1377 cd @var{objdir}; make install
1380 We strongly recommend to install into a target directory where there is
1381 no previous version of GCC present.
1383 That step completes the installation of GCC; user level binaries can
1384 be found in @file{@var{prefix}/bin} where @var{prefix} is the value you
1385 specified with the @option{--prefix} to configure (or @file{/usr/local}
1386 by default). (If you specified @option{--bindir}, that directory will
1387 be used instead; otherwise, if you specified @option{--exec-prefix},
1388 @file{@var{exec-prefix}/bin} will be used.) Headers for the C++ and
1389 Java libraries are installed in @file{@var{prefix}/include}; libraries
1390 in @file{@var{libdir}} (normally @file{@var{prefix}/lib}); internal
1391 parts of the compiler in @file{@var{libdir}/gcc-lib}; documentation in
1392 info format in @file{@var{infodir}} (normally @file{@var{prefix}/info}).
1394 When installing cross-compilers, GCC's executables
1395 are not only installed into @file{@var{bindir}}, that
1396 is, @file{@var{exec-prefix}/bin}, but additionally into
1397 @file{@var{exec-prefix}/@var{target-alias}/bin}, if that directory
1398 exists. Typically, such @dfn{tooldirs} hold target-specific
1399 binutils, including assembler and linker.
1401 Installation into a temporary staging area or into a @command{chroot}
1402 jail can be achieved with the command
1405 make DESTDIR=@var{path-to-rootdir} install
1408 @noindent where @var{path-to-rootdir} is the absolute path of
1409 a directory relative to which all installation paths will be
1410 interpreted. Note that the directory specified by @code{DESTDIR}
1411 need not exist yet; it will be created if necessary.
1413 There is a subtle point with tooldirs and @code{DESTDIR}:
1414 If you relocate a cross-compiler installation with
1415 e.g.@: @samp{DESTDIR=@var{rootdir}}, then the directory
1416 @file{@var{rootdir}/@var{exec-prefix}/@var{target-alias}/bin} will
1417 be filled with duplicated GCC executables only if it already exists,
1418 it will not be created otherwise. This is regarded as a feature,
1419 not as a bug, because it gives slightly more control to the packagers
1420 using the @code{DESTDIR} feature.
1422 If you built a released version of GCC using @samp{make bootstrap} then please
1423 quickly review the build status page for your release, available from
1424 @uref{http://gcc.gnu.org/buildstat.html}.
1425 If your system is not listed for the version of GCC that you built,
1427 @email{gcc@@gcc.gnu.org} indicating
1428 that you successfully built and installed GCC.
1429 Include the following information:
1433 Output from running @file{@var{srcdir}/config.guess}. Do not send us
1434 that file itself, just the one-line output from running it.
1437 The output of @samp{gcc -v} for your newly installed gcc.
1438 This tells us which version of GCC you built and the options you passed to
1442 Whether you enabled all languages or a subset of them. If you used a
1443 full distribution then this information is part of the configure
1444 options in the output of @samp{gcc -v}, but if you downloaded the
1445 ``core'' compiler plus additional front ends then it isn't apparent
1446 which ones you built unless you tell us about it.
1449 If the build was for GNU/Linux, also include:
1452 The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3);
1453 this information should be available from @file{/etc/issue}.
1456 The version of the Linux kernel, available from @samp{uname --version}
1460 The version of glibc you used; for RPM-based systems like Red Hat,
1461 Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version,
1462 and on systems like Debian and Progeny use @samp{dpkg -l libc6}.
1464 For other systems, you can include similar information if you think it is
1468 Any other information that you think would be useful to people building
1469 GCC on the same configuration. The new entry in the build status list
1470 will include a link to the archived copy of your message.
1473 We'd also like to know if the
1475 @ref{Specific, host/target specific installation notes}
1478 @uref{specific.html,,host/target specific installation notes}
1480 didn't include your host/target information or if that information is
1481 incomplete or out of date. Send a note to
1482 @email{gcc@@gcc.gnu.org} telling us how the information should be changed.
1484 If you find a bug, please report it following our
1485 @uref{../bugs.html,,bug reporting guidelines}.
1487 If you want to print the GCC manuals, do @samp{cd @var{objdir}; make
1488 dvi}. You will need to have @command{texi2dvi} (version at least 4.2)
1489 and @TeX{} installed. This creates a number of @file{.dvi} files in
1490 subdirectories of @file{@var{objdir}}; these may be converted for
1491 printing with programs such as @command{dvips}. You can also
1492 @uref{http://www.gnu.org/order/order.html,,buy printed manuals from the
1493 Free Software Foundation}, though such manuals may not be for the most
1494 recent version of GCC@.
1501 @uref{./index.html,,Return to the GCC Installation page}
1505 @c ***Binaries****************************************************************
1507 @comment node-name, next, previous, up
1508 @node Binaries, Specific, Installing GCC, Top
1512 @chapter Installing GCC: Binaries
1515 @cindex Installing GCC: Binaries
1517 We are often asked about pre-compiled versions of GCC@. While we cannot
1518 provide these for all platforms, below you'll find links to binaries for
1519 various platforms where creating them by yourself is not easy due to various
1522 Please note that we did not create these binaries, nor do we
1523 support them. If you have any problems installing them, please
1524 contact their makers.
1531 @uref{http://www.bullfreeware.com,,Bull's Freeware and Shareware Archive for AIX};
1534 @uref{http://aixpdslib.seas.ucla.edu,,UCLA Software Library for AIX}.
1538 DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}.
1541 Hitachi H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
1542 Development Tools for the Hitachi H8/300[HS] Series}.
1548 @uref{http://hpux.cae.wisc.edu/,,HP-UX Porting Center};
1551 @uref{ftp://sunsite.informatik.rwth-aachen.de/pub/packages/gcc_hpux/,,Binaries for HP-UX 11.00 at Aachen University of Technology}.
1555 Motorola 68HC11/68HC12---@uref{http://www.gnu-m68hc11.org,,GNU
1556 Development Tools for the Motorola 68HC11/68HC12}.
1559 @uref{http://www.sco.com/skunkware/devtools/index.html#gcc,,SCO
1560 OpenServer/Unixware}.
1563 Sinix/Reliant Unix---@uref{ftp://ftp.fujitsu-siemens.com/pub/pd/gnu/gcc/,,Siemens}.
1566 Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware}.
1569 SGI---@uref{http://freeware.sgi.com/,,SGI Freeware}.
1575 The @uref{http://sources.redhat.com/cygwin/,,Cygwin} project;
1577 The @uref{http://www.mingw.org/,,MinGW} project.
1581 @uref{ftp://ftp.thewrittenword.com/packages/by-name/,,The
1582 Written Word} offers binaries for
1585 Digital UNIX 4.0D and 5.1,
1587 HP-UX 10.20, 11.00, and 11.11, and
1588 Solaris/SPARC 2.5.1, 2.6, 2.7, 8, and 9,
1591 In addition to those specific offerings, you can get a binary
1592 distribution CD-ROM from the
1593 @uref{http://www.fsf.org/order/order.html,,Free Software Foundation}.
1594 It contains binaries for a number of platforms, and
1595 includes not only GCC, but other stuff as well. The current CD does
1596 not contain the latest version of GCC, but it should allow
1597 bootstrapping the compiler. An updated version of that disk is in the
1605 @uref{./index.html,,Return to the GCC Installation page}
1609 @c ***Specific****************************************************************
1611 @comment node-name, next, previous, up
1612 @node Specific, Old, Binaries, Top
1616 @chapter Host/target specific installation notes for GCC
1619 @cindex Specific installation notes
1620 @cindex Target specific installation
1621 @cindex Host specific installation
1622 @cindex Target specific installation notes
1624 Please read this document carefully @emph{before} installing the
1625 GNU Compiler Collection on your machine.
1630 @uref{#alpha*-*-*,,alpha*-*-*}
1632 @uref{#alpha*-dec-osf*,,alpha*-dec-osf*}
1634 @uref{#alphaev5-cray-unicosmk*,,alphaev5-cray-unicosmk*}
1636 @uref{#arc-*-elf,,arc-*-elf}
1638 @uref{#arm-*-aout,,arm-*-aout}
1640 @uref{#arm-*-elf,,arm-*-elf}
1642 @uref{#arm*-*-linux-gnu,,arm*-*-linux-gnu}
1650 @uref{#dsp16xx,,dsp16xx}
1652 @uref{#*-*-freebsd*,,*-*-freebsd*}
1654 @uref{#h8300-hms,,h8300-hms}
1656 @uref{#hppa*-hp-hpux*,,hppa*-hp-hpux*}
1658 @uref{#hppa*-hp-hpux9,,hppa*-hp-hpux9}
1660 @uref{#hppa*-hp-hpux10,,hppa*-hp-hpux10}
1662 @uref{#hppa*-hp-hpux11,,hppa*-hp-hpux11}
1664 @uref{#i370-*-*,,i370-*-*}
1666 @uref{#*-*-linux-gnu,,*-*-linux-gnu}
1668 @uref{#ix86-*-linux*aout,,i?86-*-linux*aout}
1670 @uref{#ix86-*-linux*,,i?86-*-linux*}
1672 @uref{#ix86-*-sco,,i?86-*-sco}
1674 @uref{#ix86-*-sco3.2v4,,i?86-*-sco3.2v4}
1676 @uref{#ix86-*-sco3.2v5*,,i?86-*-sco3.2v5*}
1678 @uref{#ix86-*-udk,,i?86-*-udk}
1680 @uref{#ix86-*-esix,,i?86-*-esix}
1682 @uref{#ia64-*-linux,,ia64-*-linux}
1684 @uref{#*-lynx-lynxos,,*-lynx-lynxos}
1686 @uref{#*-ibm-aix*,,*-ibm-aix*}
1688 @uref{#ip2k-*-elf,,ip2k-*-elf}
1690 @uref{#m32r-*-elf,,m32r-*-elf}
1692 @uref{#m68000-hp-bsd,,m68000-hp-bsd}
1694 @uref{#m6811-elf,,m6811-elf}
1696 @uref{#m6812-elf,,m6812-elf}
1698 @uref{#m68k-att-sysv,,m68k-att-sysv}
1700 @uref{#m68k-crds-unos,,m68k-crds-unos}
1702 @uref{#m68k-hp-hpux,,m68k-hp-hpux}
1704 @uref{#m68k-ncr-*,,m68k-ncr-*}
1706 @uref{#m68k-sun,,m68k-sun}
1708 @uref{#m68k-sun-sunos4.1.1,,m68k-sun-sunos4.1.1}
1710 @uref{#mips-*-*,,mips-*-*}
1712 @uref{#mips-sgi-irix5,,mips-sgi-irix5}
1714 @uref{#mips-sgi-irix6,,mips-sgi-irix6}
1716 @uref{#powerpc*-*-*,,powerpc*-*-*, powerpc-*-sysv4}
1718 @uref{#powerpc-*-darwin*,,powerpc-*-darwin*}
1720 @uref{#powerpc-*-elf,,powerpc-*-elf, powerpc-*-sysv4}
1722 @uref{#powerpc-*-linux-gnu*,,powerpc-*-linux-gnu*}
1724 @uref{#powerpc-*-netbsd*,,powerpc-*-netbsd*}
1726 @uref{#powerpc-*-eabiaix,,powerpc-*-eabiaix}
1728 @uref{#powerpc-*-eabisim,,powerpc-*-eabisim}
1730 @uref{#powerpc-*-eabi,,powerpc-*-eabi}
1732 @uref{#powerpcle-*-elf,,powerpcle-*-elf, powerpcle-*-sysv4}
1734 @uref{#powerpcle-*-eabisim,,powerpcle-*-eabisim}
1736 @uref{#powerpcle-*-eabi,,powerpcle-*-eabi}
1738 @uref{#powerpcle-*-winnt,,powerpcle-*-winnt, powerpcle-*-pe}
1740 @uref{#s390-*-linux*,,s390-*-linux*}
1742 @uref{#s390x-*-linux*,,s390x-*-linux*}
1744 @uref{#*-*-solaris2*,,*-*-solaris2*}
1746 @uref{#sparc-sun-solaris2*,,sparc-sun-solaris2*}
1748 @uref{#sparc-sun-solaris2.7,,sparc-sun-solaris2.7}
1750 @uref{#sparc-sun-sunos4*,,sparc-sun-sunos4*}
1752 @uref{#sparc-unknown-linux-gnulibc1,,sparc-unknown-linux-gnulibc1}
1754 @uref{#sparc-*-linux*,,sparc-*-linux*}
1756 @uref{#sparc64-*-*,,sparc64-*-*}
1758 @uref{#sparcv9-*-solaris2*,,sparcv9-*-solaris2*}
1760 @uref{#*-*-sysv*,,*-*-sysv*}
1762 @uref{#vax-dec-ultrix,,vax-dec-ultrix}
1764 @uref{#*-*-vxworks*,,*-*-vxworks*}
1766 @uref{#xtensa-*-elf,,xtensa-*-elf}
1768 @uref{#xtensa-*-linux*,,xtensa-*-linux*}
1770 @uref{#windows,,Microsoft Windows}
1774 @uref{#older,,Older systems}
1779 @uref{#elf_targets,,all ELF targets} (SVR4, Solaris 2, etc.)
1785 <!-- -------- host/target specific issues start here ---------------- -->
1788 @heading @anchor{alpha*-*-*}alpha*-*-*
1790 This section contains general configuration information for all
1791 alpha-based platforms using ELF (in particular, ignore this section for
1792 DEC OSF/1, Digital UNIX and Tru64 UNIX)@. In addition to reading this
1793 section, please read all other sections that match your target.
1795 We require binutils 2.11.2 or newer.
1796 Previous binutils releases had a number of problems with DWARF 2
1797 debugging information, not the least of which is incorrect linking of
1803 @heading @anchor{alpha*-dec-osf*}alpha*-dec-osf*
1804 Systems using processors that implement the DEC Alpha architecture and
1805 are running the DEC/Compaq Unix (DEC OSF/1, Digital UNIX, or Compaq
1806 Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
1808 As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
1809 supported. (These are the versions which identify themselves as DEC
1812 In Digital Unix V4.0, virtual memory exhausted bootstrap failures
1813 may be fixed by configuring with @option{--with-gc=simple},
1814 reconfiguring Kernel Virtual Memory and Swap parameters
1815 per the @command{/usr/sbin/sys_check} Tuning Suggestions,
1816 or applying the patch in
1817 @uref{http://gcc.gnu.org/ml/gcc/2002-08/msg00822.html}.
1819 In Tru64 UNIX V5.1, Compaq introduced a new assembler that does not
1820 currently (2001-06-13) work with @command{mips-tfile}. As a workaround,
1821 we need to use the old assembler, invoked via the barely documented
1822 @option{-oldas} option. To bootstrap GCC, you either need to use the
1826 % CC=cc @var{srcdir}/configure [@var{options}] [@var{target}]
1829 or you can use a copy of GCC 2.95.3 or higher built on Tru64 UNIX V4.0:
1832 % CC=gcc -Wa,-oldas @var{srcdir}/configure [@var{options}] [@var{target}]
1835 As of GNU binutils 2.11.2, neither GNU @command{as} nor GNU @command{ld}
1836 are supported on Tru64 UNIX, so you must not configure GCC with
1837 @option{--with-gnu-as} or @option{--with-gnu-ld}.
1839 The @option{--enable-threads} options isn't supported yet. A patch is
1840 in preparation for a future release.
1842 GCC writes a @samp{.verstamp} directive to the assembler output file
1843 unless it is built as a cross-compiler. It gets the version to use from
1844 the system header file @file{/usr/include/stamp.h}. If you install a
1845 new version of DEC Unix, you should rebuild GCC to pick up the new version
1848 Note that since the Alpha is a 64-bit architecture, cross-compilers from
1849 32-bit machines will not generate code as efficient as that generated
1850 when the compiler is running on a 64-bit machine because many
1851 optimizations that depend on being able to represent a word on the
1852 target in an integral value on the host cannot be performed. Building
1853 cross-compilers on the Alpha for 32-bit machines has only been tested in
1854 a few cases and may not work properly.
1856 @samp{make compare} may fail on old versions of DEC Unix unless you add
1857 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
1858 assembler input file is stored in the object file, and that makes
1859 comparison fail if it differs between the @code{stage1} and
1860 @code{stage2} compilations. The option @option{-save-temps} forces a
1861 fixed name to be used for the assembler input file, instead of a
1862 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
1863 unless the comparisons fail without that option. If you add
1864 @option{-save-temps}, you will have to manually delete the @samp{.i} and
1865 @samp{.s} files after each series of compilations.
1867 GCC now supports both the native (ECOFF) debugging format used by DBX
1868 and GDB and an encapsulated STABS format for use only with GDB@. See the
1869 discussion of the @option{--with-stabs} option of @file{configure} above
1870 for more information on these formats and how to select them.
1872 There is a bug in DEC's assembler that produces incorrect line numbers
1873 for ECOFF format when the @samp{.align} directive is used. To work
1874 around this problem, GCC will not emit such alignment directives
1875 while writing ECOFF format debugging information even if optimization is
1876 being performed. Unfortunately, this has the very undesirable
1877 side-effect that code addresses when @option{-O} is specified are
1878 different depending on whether or not @option{-g} is also specified.
1880 To avoid this behavior, specify @option{-gstabs+} and use GDB instead of
1881 DBX@. DEC is now aware of this problem with the assembler and hopes to
1882 provide a fix shortly.
1887 @heading @anchor{alphaev5-cray-unicosmk*}alphaev5-cray-unicosmk*
1888 Cray T3E systems running Unicos/Mk.
1890 This port is incomplete and has many known bugs. We hope to improve the
1891 support for this target soon. Currently, only the C front end is supported,
1892 and it is not possible to build parallel applications. Cray modules are not
1893 supported; in particular, Craylibs are assumed to be in
1894 @file{/opt/ctl/craylibs/craylibs}.
1896 You absolutely @strong{must} use GNU make on this platform. Also, you
1897 need to tell GCC where to find the assembler and the linker. The
1898 simplest way to do so is by providing @option{--with-as} and
1899 @option{--with-ld} to @file{configure}, e.g.@:
1902 configure --with-as=/opt/ctl/bin/cam --with-ld=/opt/ctl/bin/cld \
1903 --enable-languages=c
1906 The comparison test during @samp{make bootstrap} fails on Unicos/Mk
1907 because the assembler inserts timestamps into object files. You should
1908 be able to work around this by doing @samp{make all} after getting this
1914 @heading @anchor{arc-*-elf}arc-*-elf
1915 Argonaut ARC processor.
1916 This configuration is intended for embedded systems.
1921 @heading @anchor{arm-*-aout}arm-*-aout
1922 This configuration is obsoleted in GCC 3.3.
1924 Advanced RISC Machines ARM-family processors. These are often used in
1925 embedded applications. There are no standard Unix configurations.
1926 This configuration corresponds to the basic instruction sequences and will
1927 produce @file{a.out} format object modules.
1929 You may need to make a variant of the file @file{arm.h} for your particular
1935 @heading @anchor{arm-*-elf}arm-*-elf
1936 This configuration is intended for embedded systems.
1937 We require GNU binutils 2.13 or newer.
1942 @heading @anchor{arm*-*-linux-gnu}arm*-*-linux-gnu
1943 We require GNU binutils 2.13 or newer.
1948 @heading @anchor{xscale-*-elf}xscale-*-elf
1949 We require GNU binutils 2.13 or newer.
1954 @heading @anchor{avr}avr
1956 ATMEL AVR-family micro controllers. These are used in embedded
1957 applications. There are no standard Unix configurations.
1959 @xref{AVR Options,, AVR Options, gcc, Using and Porting the GNU Compiler
1963 See ``AVR Options'' in the main manual
1965 for the list of supported MCU types.
1967 Use @samp{configure --target=avr --enable-languages="c"} to configure GCC@.
1969 Further installation notes and other useful information about AVR tools
1970 can also be obtained from:
1974 @uref{http://www.openavr.org,,http://www.openavr.org}
1976 @uref{http://home.overta.ru/users/denisc/,,http://home.overta.ru/users/denisc/}
1978 @uref{http://www.amelek.gda.pl/avr/,,http://www.amelek.gda.pl/avr/}
1981 We @emph{strongly} recommend using binutils 2.13 or newer.
1983 The following error:
1985 Error: register required
1988 indicates that you should upgrade to a newer version of the binutils.
1993 @heading @anchor{c4x}c4x
1995 Texas Instruments TMS320C3x and TMS320C4x Floating Point Digital Signal
1996 Processors. These are used in embedded applications. There are no
1997 standard Unix configurations.
1999 @xref{TMS320C3x/C4x Options,, TMS320C3x/C4x Options, gcc, Using and
2000 Porting the GNU Compiler Collection (GCC)},
2003 See ``TMS320C3x/C4x Options'' in the main manual
2005 for the list of supported MCU types.
2007 GCC can be configured as a cross compiler for both the C3x and C4x
2008 architectures on the same system. Use @samp{configure --target=c4x
2009 --enable-languages="c,c++"} to configure.
2012 Further installation notes and other useful information about C4x tools
2013 can also be obtained from:
2017 @uref{http://www.elec.canterbury.ac.nz/c4x/,,http://www.elec.canterbury.ac.nz/c4x/}
2023 @heading @anchor{cris}CRIS
2025 CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
2026 series. These are used in embedded applications.
2029 @xref{CRIS Options,, CRIS Options, gcc, Using and Porting the GNU Compiler
2033 See ``CRIS Options'' in the main manual
2035 for a list of CRIS-specific options.
2037 There are a few different CRIS targets:
2039 @item cris-axis-aout
2040 Old target. Includes a multilib for the @samp{elinux} a.out-based
2041 target. No multilibs for newer architecture variants.
2043 Mainly for monolithic embedded systems. Includes a multilib for the
2044 @samp{v10} core used in @samp{ETRAX 100 LX}.
2045 @item cris-axis-linux-gnu
2046 A GNU/Linux port for the CRIS architecture, currently targeting
2047 @samp{ETRAX 100 LX} by default.
2050 For @code{cris-axis-aout} and @code{cris-axis-elf} you need binutils 2.11
2051 or newer. For @code{cris-axis-linux-gnu} you need binutils 2.12 or newer.
2053 Pre-packaged tools can be obtained from
2054 @uref{ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/}. More
2055 information about this platform is available at
2056 @uref{http://developer.axis.com/}.
2061 @heading @anchor{dos}DOS
2063 Please have a look at our @uref{binaries.html,,binaries page}.
2065 You cannot install GCC by itself on MSDOS; it will not compile under
2066 any MSDOS compiler except itself. You need to get the complete
2067 compilation package DJGPP, which includes binaries as well as sources,
2068 and includes all the necessary compilation tools and libraries.
2073 @heading @anchor{dsp16xx}dsp16xx
2074 A port to the AT&T DSP1610 family of processors.
2079 @heading @anchor{*-*-freebsd*}*-*-freebsd*
2081 The version of binutils installed in @file{/usr/bin} is known to work unless
2082 otherwise specified in any per-architecture notes. However, binutils
2083 2.12.1 or greater is known to improve overall testsuite results.
2085 FreeBSD 1 is no longer supported in GCC 3.2.
2087 For FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
2088 configuration support and files as shipped with GCC 2.95 are still in
2089 place. FreeBSD 2.2.7 has been known to bootstrap completely; however,
2090 it is unknown which version of binutils was used (it is assumed that it
2091 was the system copy in @file{/usr/bin}) and C++ EH failures were noted.
2093 For FreeBSD using the ELF file format: DWARF 2 debugging is now the
2094 default for all CPU architectures. It had been the default on
2095 FreeBSD/alpha since its inception. You may use @option{-gstabs} instead
2096 of @option{-g}, if you really want the old debugging format. There are
2097 no known issues with mixing object files and libraries with different
2098 debugging formats. Otherwise, this release of GCC should now match more
2099 of the configuration used in the stock FreeBSD configuration of GCC. In
2100 particular, @option{--enable-threads} is now configured by default.
2101 However, as a general user, do not attempt to replace the system
2102 compiler with this release. Known to bootstrap and check with good
2103 results on FreeBSD 4.8-STABLE and 5-CURRENT@. In the past, known to
2104 bootstrap and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2,
2105 4.3, 4.4, 4.5-STABLE@.
2107 In principle, @option{--enable-threads} is now compatible with
2108 @option{--enable-libgcj} on FreeBSD@. However, it has only been built
2109 and tested on @samp{i386-*-freebsd[45]} and @samp{alpha-*-freebsd[45]}.
2111 library may be incorrectly built (symbols are missing at link time).
2112 There is a rare timing-based startup hang (probably involves an
2113 assumption about the thread library). Multi-threaded boehm-gc (required for
2114 libjava) exposes severe threaded signal-handling bugs on FreeBSD before
2115 4.5-RELEASE@. Other CPU architectures
2116 supported by FreeBSD will require additional configuration tuning in, at
2117 the very least, both boehm-gc and libffi.
2119 Shared @file{libgcc_s.so} is now built and installed by default.
2124 @heading @anchor{h8300-hms}h8300-hms
2125 Hitachi H8/300 series of processors.
2127 Please have a look at our @uref{binaries.html,,binaries page}.
2129 The calling convention and structure layout has changed in release 2.6.
2130 All code must be recompiled. The calling convention now passes the
2131 first three arguments in function calls in registers. Structures are no
2132 longer a multiple of 2 bytes.
2137 @heading @anchor{hppa*-hp-hpux*}hppa*-hp-hpux*
2138 Support for HP-UX versions 7, 8, and 9 is obsoleted in GCC 3.3.
2140 We @emph{highly} recommend using gas/binutils 2.8 or newer on all hppa
2141 platforms; you may encounter a variety of problems when using the HP
2144 Specifically, @option{-g} does not work on HP-UX (since that system
2145 uses a peculiar debugging format which GCC does not know about), unless you
2146 use GAS and GDB and configure GCC with the
2147 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and
2148 @option{--with-as=@dots{}} options.
2150 If you wish to use the pa-risc 2.0 architecture support with a 32-bit
2151 runtime, you must use either the HP assembler, gas/binutils 2.11 or newer,
2153 @uref{ftp://sources.redhat.com/pub/binutils/snapshots,,snapshot of gas}.
2155 There are two default scheduling models for instructions. These are
2156 PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
2157 architecture specified for the target machine when configuring.
2158 PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
2159 the target is a @samp{hppa1*} machine.
2161 The PROCESSOR_8000 model is not well suited to older processors. Thus,
2162 it is important to completely specify the machine architecture when
2163 configuring if you want a model other than PROCESSOR_8000. The macro
2164 TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
2165 default scheduling model is desired.
2167 More specific information to @samp{hppa*-hp-hpux*} targets follows.
2172 @heading @anchor{hppa*-hp-hpux9}hppa*-hp-hpux9
2173 Support for this system is obsoleted in GCC 3.3.
2175 The HP assembler has major problems on this platform. We've tried to work
2176 around the worst of the problems. However, those workarounds may be causing
2177 linker crashes in some circumstances; the workarounds also probably prevent
2178 shared libraries from working. Use the GNU assembler to avoid these problems.
2181 The configuration scripts for GCC will also trigger a bug in the hpux9
2182 shell. To avoid this problem set @env{CONFIG_SHELL} to @file{/bin/ksh}
2183 and @env{SHELL} to @file{/bin/ksh} in your environment.
2189 @heading @anchor{hppa*-hp-hpux10}hppa*-hp-hpux10
2191 For hpux10.20, we @emph{highly} recommend you pick up the latest sed patch
2192 @code{PHCO_19798} from HP@. HP has two sites which provide patches free of
2198 <a href="http://us.itrc.hp.com/service/home/home.do">US, Canada, Asia-Pacific, and
2202 @uref{http://us.itrc.hp.com/service/home/home.do,,} US, Canada, Asia-Pacific,
2206 @uref{http://europe.itrc.hp.com/service/home/home.do,,} Europe.
2209 The HP assembler on these systems is much better than the hpux9 assembler,
2210 but still has some problems. Most notably the assembler inserts timestamps
2211 into each object file it creates, causing the 3-stage comparison test to fail
2212 during a @samp{make bootstrap}. You should be able to continue by
2213 saying @samp{make all} after getting the failure from @samp{make
2220 @heading @anchor{hppa*-hp-hpux11}hppa*-hp-hpux11
2222 GCC 3.0 and up support HP-UX 11. On 64-bit capable systems, there
2223 are two distinct ports. The @samp{hppa2.0w-hp-hpux11*} port generates
2224 code for the 32-bit pa-risc runtime architecture. It uses the HP
2225 linker. The @samp{hppa64-hp-hpux11*} port generates 64-bit code for the
2226 pa-risc 2.0 architecture. The script config.guess now selects the port
2227 type based on the type compiler detected during configuration. You must
2228 set your @env{PATH} or define @env{CC} so that configure finds an appropriate
2229 compiler for the initial bootstrap. Different prefixes must be used if
2230 both ports are to be installed on the same system.
2232 It is best to explicitly configure the @samp{hppa64-hp-hpux11*} target
2233 with the @option{--with-ld=@dots{}} option. We support both the HP
2234 and GNU linkers for this target. The two linkers require different
2235 link commands. Thus, it's not possible to switch linkers during a
2236 GCC build. This has been been reported to occur in a unified build
2237 of binutils and GCC.
2239 GCC 2.95.x is not supported under HP-UX 11 and cannot be used to
2240 compile GCC 3.0 and up. Refer to @uref{binaries.html,,binaries} for
2241 information about obtaining precompiled GCC binaries for HP-UX.
2243 You must use GNU binutils 2.11 or above with the 32-bit port. Thread
2244 support is not currently implemented, so @option{--enable-threads} does
2248 @item @uref{http://gcc.gnu.org/ml/gcc-prs/2002-01/msg00551.html}
2249 @item @uref{http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00663.html}
2252 GCC 3.3 and later support weak symbols on the 32-bit port using SOM
2253 secondary definition symbols. This feature is not enabled for earlier
2254 versions of HP-UX since there have been bugs in the linker support for
2255 secondary symbols. The HP linker patches @code{PHSS_26559} and
2256 @code{PHSS_24304} for HP-UX 11.00 and 11.11, respectively, correct the
2257 problem of linker core dumps creating C++ libraries. Earlier patches
2258 may work but they have not been tested.
2260 GCC 3.3 nows uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capability
2261 to run initializers and finalizers on the 64-bit port. The feature
2262 requires CVS binutils as of January 2, 2003, or a subsequent release
2263 to correct a problem arising from HP's non-standard use of the .init
2264 and .fini sections. The 32-bit port uses the linker @option{+init}
2265 and @option{+fini} options. As with the support for secondary symbols,
2266 there have been bugs in the order in which these options are executed
2267 by the HP linker. So, again a recent linker patch is recommended.
2269 The HP assembler has many limitations and is not recommended for either
2270 the 32 or 64-bit ports. For example, it does not support weak symbols
2271 or alias definitions. As a result, explicit template instantiations
2272 are required when using C++. This will make it difficult if not
2273 impossible to build many C++ applications. You also can't generate
2274 debugging information when using the HP assembler with GCC.
2276 There are a number of issues to consider in selecting which linker to
2277 use with the 64-bit port. The GNU 64-bit linker can only create dynamic
2278 binaries. The @option{-static} option causes linking with archive
2279 libraries but doesn't produce a truly static binary. Dynamic binaries
2280 still require final binding by the dynamic loader to resolve a set of
2281 dynamic-loader-defined symbols. The default behavior of the HP linker
2282 is the same as the GNU linker. However, it can generate true 64-bit
2283 static binaries using the @option{+compat} option.
2285 The HP 64-bit linker doesn't support linkonce semantics. As a
2286 result, C++ programs have many more sections than they should.
2288 The GNU 64-bit linker has some issues with shared library support
2289 and exceptions. As a result, we only support libgcc in archive
2290 format. For similar reasons, dwarf2 unwind and exception support
2291 are disabled. The GNU linker also has problems creating binaries
2292 with @option{-static}. It doesn't provide stubs for internal
2293 calls to global functions in shared libraries, so these calls
2294 can't be overloaded.
2296 There are several possible approaches to building the distribution.
2297 Binutils can be built first using the HP tools. Then, the GCC
2298 distribution can be built. The second approach is to build GCC
2299 first using the HP tools, then build binutils, then rebuild GCC.
2300 There have been problems with various binary distributions, so
2301 it is best not to start from a binary distribution.
2303 When starting with a HP compiler, it is preferable to use the ANSI
2304 compiler as the bundled compiler only supports traditional C.
2305 Bootstrapping with the bundled compiler is tested infrequently and
2306 problems often arise because of the subtle differences in semantics
2307 between traditional and ISO C.
2309 This port still is undergoing significant development.
2314 @heading @anchor{i370-*-*}i370-*-*
2315 This port is very preliminary and has many known bugs. We hope to
2316 have a higher-quality port for this machine soon.
2321 @heading @anchor{*-*-linux-gnu}*-*-linux-gnu
2323 Versions of libstdc++-v3 starting with 3.2.1 require bugfixes present
2324 in glibc 2.2.5 and later. More information is available in the
2325 libstdc++-v3 documentation.
2327 If you use glibc 2.2 (or 2.1.9x), GCC 2.95.2 won't install
2328 out-of-the-box. You'll get compile errors while building @samp{libstdc++}.
2329 The patch @uref{glibc-2.2.patch,,glibc-2.2.patch}, that is to be
2330 applied in the GCC source tree, fixes the compatibility problems.
2332 Currently Glibc 2.2.3 (and older releases) and GCC 3.0 are out of sync
2333 since the latest exception handling changes for GCC@. Compiling glibc
2334 with GCC 3.0 will give a binary incompatible glibc and therefore cause
2335 lots of problems and might make your system completely unusable. This
2336 will definitely need fixes in glibc but might also need fixes in GCC@. We
2337 strongly advise to wait for glibc 2.2.4 and to read the release notes of
2338 glibc 2.2.4 whether patches for GCC 3.0 are needed. You can use glibc
2339 2.2.3 with GCC 3.0, just do not try to recompile it.
2344 @heading @anchor{ix86-*-linux*aout}i?86-*-linux*aout
2345 Use this configuration to generate @file{a.out} binaries on Linux-based
2346 GNU systems. This configuration is being superseded. You must use
2347 gas/binutils version 2.5.2 or later.
2352 @heading @anchor{ix86-*-linux*}i?86-*-linux*
2354 You will need binutils 2.9.1.0.15 or newer for exception handling to work.
2356 If you receive Signal 11 errors when building on GNU/Linux, then it is
2357 possible you have a hardware problem. Further information on this can be
2358 found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}.
2363 @heading @anchor{ix86-*-sco}i?86-*-sco
2364 Compilation with RCC is recommended. Also, it may be a good idea to
2365 link with GNU malloc instead of the malloc that comes with the system.
2370 @heading @anchor{ix86-*-sco3.2v4}i?86-*-sco3.2v4
2371 Use this configuration for SCO release 3.2 version 4.
2376 @heading @anchor{ix86-*-sco3.2v5*}i?86-*-sco3.2v5*
2377 Use this for the SCO OpenServer Release 5 family of operating systems.
2379 Unlike earlier versions of GCC, the ability to generate COFF with this
2380 target is no longer provided.
2382 Earlier versions of GCC emitted DWARF 1 when generating ELF to allow
2383 the system debugger to be used. That support was too burdensome to
2384 maintain. GCC now emits only DWARF 2 for this target. This means you
2385 may use either the UDK debugger or GDB to debug programs built by this
2388 GCC is now only supported on releases 5.0.4 and later, and requires that
2389 you install Support Level Supplement OSS646B or later, and Support Level
2390 Supplement OSS631C or later. If you are using release 5.0.7 of
2391 OpenServer, you must have at least the first maintenance pack installed
2392 (this includes the relevant portions of OSS646). OSS646, also known as
2393 the "Execution Environment Update", provides updated link editors and
2394 assemblers, as well as updated standard C and math libraries. The C
2395 startup modules are also updated to support the System V gABI draft, and
2396 GCC relies on that behaviour. OSS631 provides a collection of commonly
2397 used open source libraries, some of which GCC depends on (such as GNU
2398 gettext and zlib). SCO OpenServer Release 5.0.7 has all of this built
2399 in by default, but OSS631C and later also apply to that release. Please
2401 @uref{ftp://ftp.sco.com/pub/openserver5,,ftp://ftp.sco.com/pub/openserver5}
2402 for the latest versions of these (and other potentially useful)
2405 Although there is support for using the native assembler, it is
2406 recommended that you configure GCC to use the GNU assembler. You do
2407 this by using the flags
2408 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}}. You should
2409 use a modern version of GNU binutils. Version 2.13.2.1 was used for all
2410 testing. In general, only the @option{--with-gnu-as} option is tested.
2411 A modern bintuils (as well as a plethora of other development related
2412 GNU utilities) can be found in Support Level Supplement OSS658A, the
2413 "GNU Development Tools" package. See the SCO web and ftp sites for details.
2414 That package also contains the currently "officially supported" version of
2415 GCC, version 2.95.3. It is useful for bootstrapping this version.
2420 @heading @anchor{ix86-*-udk}i?86-*-udk
2422 This target emulates the SCO Universal Development Kit and requires that
2423 package be installed. (If it is installed, you will have a
2424 @file{/udk/usr/ccs/bin/cc} file present.) It's very much like the
2425 @samp{i?86-*-unixware7*} target
2426 but is meant to be used when hosting on a system where UDK isn't the
2427 default compiler such as OpenServer 5 or Unixware 2. This target will
2428 generate binaries that will run on OpenServer, Unixware 2, or Unixware 7,
2429 with the same warnings and caveats as the SCO UDK@.
2431 This target is a little tricky to build because we have to distinguish
2432 it from the native tools (so it gets headers, startups, and libraries
2433 from the right place) while making the tools not think we're actually
2434 building a cross compiler. The easiest way to do this is with a configure
2438 CC=/udk/usr/ccs/bin/cc @var{/your/path/to}/gcc/configure \
2439 --host=i686-pc-udk --target=i686-pc-udk --program-prefix=udk-
2442 @emph{You should substitute @samp{i686} in the above command with the appropriate
2443 processor for your host.}
2445 After the usual @samp{make bootstrap} and
2446 @samp{make install}, you can then access the UDK-targeted GCC
2447 tools by adding @command{udk-} before the commonly known name. For
2448 example, to invoke the C compiler, you would use @command{udk-gcc}.
2449 They will coexist peacefully with any native-target GCC tools you may
2456 @heading @anchor{ia64-*-linux}ia64-*-linux
2457 IA-64 processor (also known as IPF, or Itanium Processor Family)
2460 The toolchain is not completely finished, so requirements will continue
2462 GCC 3.0.1 and later require glibc 2.2.4.
2463 GCC 3.0.2 requires binutils from 2001-09-05 or later.
2464 GCC 3.0.1 requires binutils 2.11.1 or later.
2466 None of the following versions of GCC has an ABI that is compatible
2467 with any of the other versions in this list, with the exception that
2468 Red Hat 2.96 and Trillian 000171 are compatible with each other:
2469 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
2470 This primarily affects C++ programs and programs that create shared libraries.
2471 Because of these ABI incompatibilities, GCC 3.0.2 is not recommended for
2472 user programs on GNU/Linux systems built using earlier compiler releases.
2473 GCC 3.0.2 is recommended for compiling linux, the kernel.
2474 GCC 3.0.2 is believed to be fully ABI compliant, and hence no more major
2475 ABI changes are expected.
2480 @heading @anchor{*-lynx-lynxos}*-lynx-lynxos
2481 Support for SPARC LynxOS is obsoleted in GCC 3.3.
2483 LynxOS 2.2 and earlier comes with GCC 1.x already installed as
2484 @file{/bin/gcc}. You should compile with this instead of @file{/bin/cc}.
2485 You can tell GCC to use the GNU assembler and linker, by specifying
2486 @samp{--with-gnu-as --with-gnu-ld} when configuring. These will produce
2487 COFF format object files and executables; otherwise GCC will use the
2488 installed tools, which produce @file{a.out} format executables.
2492 <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
2494 @heading @anchor{*-ibm-aix*}*-ibm-aix*
2495 Support for AIX versions 1, 2, and 3 is obsoleted in GCC 3.3.
2497 AIX Make frequently has problems with GCC makefiles. GNU Make 3.76 or
2498 newer is recommended to build on this platform.
2500 Errors involving @code{alloca} when building GCC generally are due
2501 to an incorrect definition of @code{CC} in the Makefile or mixing files
2502 compiled with the native C compiler and GCC@. During the stage1 phase of
2503 the build, the native AIX compiler @strong{must} be invoked as @command{cc}
2504 (not @command{xlc}). Once @command{configure} has been informed of
2505 @command{xlc}, one needs to use @samp{make distclean} to remove the
2506 configure cache files and ensure that @env{CC} environment variable
2507 does not provide a definition that will confuse @command{configure}.
2508 If this error occurs during stage2 or later, then the problem most likely
2509 is the version of Make (see above).
2511 The GNU Assembler incorrectly reports that it supports WEAK symbols on
2512 AIX which causes GCC to try to utilize weak symbol functionality although
2513 it is not supported on the platform. The native @command{as} and
2514 @command{ld} still are recommended. The native AIX tools do
2515 interoperate with GCC@.
2517 Building @file{libstdc++.a} requires a fix for an AIX Assembler bug
2518 APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).
2520 @samp{libstdc++} in GCC 3.2 increments the major version number of the
2521 shared object and GCC installation places the @file{libstdc++.a}
2522 shared library in a common location which will overwrite the GCC 3.1
2523 version of the shared library. Applications either need to be
2524 re-linked against the new shared library or the GCC 3.1 version of the
2525 @samp{libstdc++} shared object needs to be available to the AIX
2526 runtime loader. The GCC 3.1 @samp{libstdc++.so.4} shared object can
2527 be installed for runtime dynamic loading using the following steps to
2528 set the @samp{F_LOADONLY} flag in the shared object for @emph{each}
2529 multilib @file{libstdc++.a} installed:
2531 Extract the shared object from each the GCC 3.1 @file{libstdc++.a}
2534 % ar -x libstdc++.a libstdc++.so.4
2537 Enable the @samp{F_LOADONLY} flag so that the shared object will be
2538 available for runtime dynamic loading, but not linking:
2540 % strip -e libstdc++.so.4
2543 Archive the runtime-only shared object in the GCC 3.2
2544 @file{libstdc++.a} archive:
2546 % ar -q libstdc++.a libstdc++.so.4
2549 Linking executables and shared libraries may produce warnings of
2550 duplicate symbols. The assembly files generated by GCC for AIX always
2551 have included multiple symbol definitions for certain global variable
2552 and function declarations in the original program. The warnings should
2553 not prevent the linker from producing a correct library or runnable
2556 AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and
2557 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
2558 to parse archive libraries did not handle the new format correctly.
2559 These routines are used by GCC and result in error messages during
2560 linking such as ``not a COFF file''. The version of the routines shipped
2561 with AIX 4.3.1 should work for a 32-bit environment. The @option{-g}
2562 option of the archive command may be used to create archives of 32-bit
2563 objects using the original ``small format''. A correct version of the
2564 routines is shipped with AIX 4.3.2 and above.
2566 Some versions of the AIX binder (linker) can fail with a relocation
2567 overflow severe error when the @option{-bbigtoc} option is used to link
2568 GCC-produced object files into an executable that overflows the TOC@. A fix
2569 for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
2570 available from IBM Customer Support and from its
2571 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2572 website as PTF U455193.
2574 The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
2575 with a segmentation fault when invoked by any version of GCC@. A fix for
2576 APAR IX87327 is available from IBM Customer Support and from its
2577 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2578 website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
2580 The initial assembler shipped with AIX 4.3.0 generates incorrect object
2581 files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
2582 TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
2583 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2584 website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
2586 AIX provides National Language Support (NLS)@. Compilers and assemblers
2587 use NLS to support locale-specific representations of various data
2588 formats including floating-point numbers (e.g., @samp{.} vs @samp{,} for
2589 separating decimal fractions). There have been problems reported where
2590 GCC does not produce the same floating-point formats that the assembler
2591 expects. If one encounters this problem, set the @env{LANG}
2592 environment variable to @samp{C} or @samp{En_US}.
2594 By default, GCC for AIX 4.1 and above produces code that can be used on
2595 both Power or PowerPC processors.
2597 A default can be specified with the @option{-mcpu=@var{cpu_type}}
2598 switch and using the configure option @option{--with-cpu-@var{cpu_type}}.
2603 @heading @anchor{ip2k-*-elf}ip2k-*-elf
2604 Ubicom IP2022 micro controller.
2605 This configuration is intended for embedded systems.
2606 There are no standard Unix configurations.
2608 Use @samp{configure --target=ip2k-elf --enable-languages=c} to configure GCC@.
2613 @heading @anchor{m32r-*-elf}m32r-*-elf
2614 Mitsubishi M32R processor.
2615 This configuration is intended for embedded systems.
2620 @heading @anchor{m68000-hp-bsd}m68000-hp-bsd
2621 Support for this system is obsoleted in GCC 3.3.
2623 HP 9000 series 200 running BSD@. Note that the C compiler that comes
2624 with this system cannot compile GCC; contact @email{law@@cygnus.com}
2625 to get binaries of GCC for bootstrapping.
2630 @heading @anchor{m6811-elf}m6811-elf
2631 Motorola 68HC11 family micro controllers. These are used in embedded
2632 applications. There are no standard Unix configurations.
2637 @heading @anchor{m6812-elf}m6812-elf
2638 Motorola 68HC12 family micro controllers. These are used in embedded
2639 applications. There are no standard Unix configurations.
2644 @heading @anchor{m68k-att-sysv}m68k-att-sysv
2645 Support for this system is obsoleted in GCC 3.3.
2647 AT&T 3b1, a.k.a.@: 7300 PC@. This version of GCC cannot
2648 be compiled with the system C compiler, which is too buggy.
2649 You will need to get a previous version of GCC and use it to
2650 bootstrap. Binaries are available from the OSU-CIS archive, at
2651 @uref{ftp://ftp.uu.net/systems/att7300/}.
2656 @heading @anchor{m68k-crds-unos}m68k-crds-unos
2657 Support for this system is obsoleted in GCC 3.3.
2659 Use @samp{configure unos} for building on Unos.
2661 The Unos assembler is named @command{casm} instead of @command{as}. For some
2662 strange reason linking @file{/bin/as} to @file{/bin/casm} changes the
2663 behavior, and does not work. So, when installing GCC, you should
2664 install the following script as @file{as} in the subdirectory where
2665 the passes of GCC are installed:
2672 The default Unos library is named @file{libunos.a} instead of
2673 @file{libc.a}. To allow GCC to function, either change all
2674 references to @option{-lc} in @file{gcc.c} to @option{-lunos} or link
2675 @file{/lib/libc.a} to @file{/lib/libunos.a}.
2677 @cindex @code{alloca}, for Unos
2678 When compiling GCC with the standard compiler, to overcome bugs in
2679 the support of @code{alloca}, do not use @option{-O} when making stage 2.
2680 Then use the stage 2 compiler with @option{-O} to make the stage 3
2681 compiler. This compiler will have the same characteristics as the usual
2682 stage 2 compiler on other systems. Use it to make a stage 4 compiler
2683 and compare that with stage 3 to verify proper compilation.
2685 (Perhaps simply defining @code{ALLOCA} in @file{x-crds} as described in
2686 the comments there will make the above paragraph superfluous. Please
2687 inform us of whether this works.)
2689 Unos uses memory segmentation instead of demand paging, so you will need
2690 a lot of memory. 5 Mb is barely enough if no other tasks are running.
2691 If linking @file{cc1} fails, try putting the object files into a library
2692 and linking from that library.
2697 @heading @anchor{m68k-hp-hpux}m68k-hp-hpux
2698 HP 9000 series 300 or 400 running HP-UX@. HP-UX version 8.0 has a bug in
2699 the assembler that prevents compilation of GCC@. This
2700 bug manifests itself during the first stage of compilation, while
2701 building @file{libgcc2.a}:
2705 cc1: warning: `-g' option not supported on this version of GCC
2706 cc1: warning: `-g1' option not supported on this version of GCC
2707 ./xgcc: Internal compiler error: program as got fatal signal 11
2710 A patched version of the assembler is available as the file
2711 @uref{ftp://altdorf.ai.mit.edu/archive/cph/hpux-8.0-assembler}. If you
2712 have HP software support, the patch can also be obtained directly from
2713 HP, as described in the following note:
2716 This is the patched assembler, to patch SR#1653-010439, where the
2717 assembler aborts on floating point constants.
2719 The bug is not really in the assembler, but in the shared library
2720 version of the function ``cvtnum(3c)''. The bug on ``cvtnum(3c)'' is
2721 SR#4701-078451. Anyway, the attached assembler uses the archive
2722 library version of ``cvtnum(3c)'' and thus does not exhibit the bug.
2725 This patch is also known as PHCO_4484.
2727 In addition, if you wish to use gas, you must use
2728 gas version 2.1 or later, and you must use the GNU linker version 2.1 or
2729 later. Earlier versions of gas relied upon a program which converted the
2730 gas output into the native HP-UX format, but that program has not been
2731 kept up to date. gdb does not understand that native HP-UX format, so
2732 you must use gas if you wish to use gdb.
2734 On HP-UX version 8.05, but not on 8.07 or more recent versions, the
2735 @command{fixproto} shell script triggers a bug in the system shell. If you
2736 encounter this problem, upgrade your operating system or use BASH (the
2737 GNU shell) to run @command{fixproto}. This bug will cause the fixproto
2738 program to report an error of the form:
2741 ./fixproto: sh internal 1K buffer overflow
2744 To fix this, you can also change the first line of the fixproto script
2755 @heading @anchor{m68k-ncr-*}m68k-ncr-*
2756 Support for this system is obsoleted in GCC 3.3.
2758 On the Tower models 4@var{n}0 and 6@var{n}0, by default a process is not
2759 allowed to have more than one megabyte of memory. GCC cannot compile
2760 itself (or many other programs) with @option{-O} in that much memory.
2762 To solve this problem, reconfigure the kernel adding the following line
2763 to the configuration file:
2773 @heading @anchor{m68k-sun}m68k-sun
2774 Support for this system is obsoleted in GCC 3.3.
2776 Sun 3. We do not provide a configuration file to use the Sun FPA by
2777 default, because programs that establish signal handlers for floating
2778 point traps inherently cannot work with the FPA@.
2783 @heading @anchor{m68k-sun-sunos4.1.1}m68k-sun-sunos4.1.1
2784 Support for this system is obsoleted in GCC 3.3.
2787 It is reported that you may need the GNU assembler on this platform.
2793 @heading @anchor{mips-*-*}mips-*-*
2794 If on a MIPS system you get an error message saying ``does not have gp
2795 sections for all it's [sic] sectons [sic]'', don't worry about it. This
2796 happens whenever you use GAS with the MIPS linker, but there is not
2797 really anything wrong, and it is okay to use the output file. You can
2798 stop such warnings by installing the GNU linker.
2800 It would be nice to extend GAS to produce the gp tables, but they are
2801 optional, and there should not be a warning about their absence.
2803 The libstdc++ atomic locking routines for MIPS targets requires MIPS II
2804 and later. A patch went in just after the GCC 3.3 release to
2805 make @samp{mips*-*-*} use the generic implementation instead. You can also
2806 configure for @samp{mipsel-elf} as a workaround. The
2807 @samp{mips*-*-linux*} target continues to use the MIPS II routines. More
2808 work on this is expected in future releases.
2810 @heading @anchor{mips-sgi-irix5}mips-sgi-irix5
2812 This configuration has considerable problems, which will be fixed in a
2815 In order to compile GCC on an SGI running IRIX 5, the ``compiler_dev.hdr''
2816 subsystem must be installed from the IDO CD-ROM supplied by Silicon
2817 Graphics. It is also available for download from
2818 @uref{http://www.sgi.com/developers/devtools/apis/ido.html,,http://www.sgi.com/developers/devtools/apis/ido.html}.
2820 @samp{make compare} may fail on version 5 of IRIX unless you add
2821 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
2822 assembler input file is stored in the object file, and that makes
2823 comparison fail if it differs between the @code{stage1} and
2824 @code{stage2} compilations. The option @option{-save-temps} forces a
2825 fixed name to be used for the assembler input file, instead of a
2826 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
2827 unless the comparisons fail without that option. If you do you
2828 @option{-save-temps}, you will have to manually delete the @samp{.i} and
2829 @samp{.s} files after each series of compilations.
2831 If you use the MIPS C compiler to bootstrap, it may be necessary
2832 to increase its table size for switch statements with the
2833 @option{-Wf,-XNg1500} option. If you use the @option{-O2}
2834 optimization option, you also need to use @option{-Olimit 3000}.
2836 To enable debugging under IRIX 5, you must use GNU @command{as} 2.11.2
2838 and use the @option{--with-gnu-as} configure option when configuring GCC.
2839 GNU @command{as} is distributed as part of the binutils package.
2840 When using release 2.11.2, you need to apply a patch
2841 @uref{http://sources.redhat.com/ml/binutils/2001-07/msg00352.html,,http://sources.redhat.com/ml/binutils/2001-07/msg00352.html}
2842 which will be included in the next release of binutils.
2844 When building GCC, the build process loops rebuilding @command{cc1} over
2845 and over again. This happens on @samp{mips-sgi-irix5.2}, and possibly
2846 other platforms. It has been reported that this is a known bug in the
2847 @command{make} shipped with IRIX 5.2. We recommend you use GNU
2848 @command{make} instead of the vendor supplied @command{make} program;
2849 however, you may have success with @command{smake} on IRIX 5.2 if you do
2850 not have GNU @command{make} available.
2855 @heading @anchor{mips-sgi-irix6}mips-sgi-irix6
2857 If you are using IRIX @command{cc} as your bootstrap compiler, you must
2858 ensure that the N32 ABI is in use. To test this, compile a simple C
2859 file with @command{cc} and then run @command{file} on the
2860 resulting object file. The output should look like:
2863 test.o: ELF N32 MSB @dots{}
2869 test.o: ELF 32-bit MSB @dots{}
2875 test.o: ELF 64-bit MSB @dots{}
2878 then your version of @command{cc} uses the O32 or N64 ABI by default. You
2879 should set the environment variable @env{CC} to @samp{cc -n32}
2880 before configuring GCC@.
2882 If you want the resulting @command{gcc} to run on old 32-bit systems
2883 with the MIPS R4400 CPU, you need to ensure that only code for the mips3
2884 instruction set architecture (ISA) is generated. While GCC 3.x does
2885 this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change
2886 the ISA depending on the machine where GCC is built. Using one of them
2887 as the bootstrap compiler may result in mips4 code, which won't run at
2888 all on mips3-only systems. For the test program above, you should see:
2891 test.o: ELF N32 MSB mips-3 @dots{}
2897 test.o: ELF N32 MSB mips-4 @dots{}
2900 instead, you should set the environment variable @env{CC} to @samp{cc
2901 -n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@.
2903 GCC on IRIX 6 is usually built to support both the N32 and N64 ABIs. If
2904 you build GCC on a system that doesn't have the N64 libraries installed,
2905 you need to configure with @option{--disable-multilib} so GCC doesn't
2906 try to use them. Look for @file{/usr/lib64/libc.so.1} to see if you
2907 have the 64-bit libraries installed.
2909 You must @emph{not} use GNU @command{as} (which isn't built anyway as of
2910 binutils 2.11.2) on IRIX 6 platforms; doing so will only cause problems.
2912 GCC does not currently support generating O32 ABI binaries in the
2913 @samp{mips-sgi-irix6} configurations. It is possible to create a GCC
2914 with O32 ABI only support by configuring it for the @samp{mips-sgi-irix5}
2915 target and using a patched GNU @command{as} 2.11.2 as documented in the
2916 @uref{#mips-sgi-irix5,,@samp{mips-sgi-irix5}} section above. Using the
2917 native assembler requires patches to GCC which will be included in a
2918 future release. It is
2919 expected that O32 ABI support will be available again in a future release.
2921 The @option{--enable-threads} option doesn't currently work, a patch is
2922 in preparation for a future release. The @option{--enable-libgcj}
2923 option is disabled by default: IRIX 6 uses a very low default limit
2924 (20480) for the command line length. Although libtool contains a
2925 workaround for this problem, at least the N64 @samp{libgcj} is known not
2926 to build despite this, running into an internal error of the native
2927 @command{ld}. A sure fix is to increase this limit (@samp{ncargs}) to
2928 its maximum of 262144 bytes. If you have root access, you can use the
2929 @command{systune} command to do this.
2931 GCC does not correctly pass/return structures which are
2932 smaller than 16 bytes and which are not 8 bytes. The problem is very
2933 involved and difficult to fix. It affects a number of other targets also,
2934 but IRIX 6 is affected the most, because it is a 64-bit target, and 4 byte
2935 structures are common. The exact problem is that structures are being padded
2936 at the wrong end, e.g.@: a 4 byte structure is loaded into the lower 4 bytes
2937 of the register when it should be loaded into the upper 4 bytes of the
2940 GCC is consistent with itself, but not consistent with the SGI C compiler
2941 (and the SGI supplied runtime libraries), so the only failures that can
2942 happen are when there are library functions that take/return such
2943 structures. There are very few such library functions. Currently this
2944 is known to affect @code{inet_ntoa}, @code{inet_lnaof},
2945 @code{inet_netof}, @code{inet_makeaddr}, and @code{semctl}. Until the
2946 bug is fixed, GCC contains workarounds for the known affected functions.
2948 See @uref{http://freeware.sgi.com/,,http://freeware.sgi.com/} for more
2949 information about using GCC on IRIX platforms.
2954 @heading @anchor{powerpc*-*-*}powerpc-*-*
2956 You can specify a default version for the @option{-mcpu=@var{cpu_type}}
2957 switch by using the configure option @option{--with-cpu-@var{cpu_type}}.
2962 @heading @anchor{powerpc-*-darwin*}powerpc-*-darwin*
2963 PowerPC running Darwin (Mac OS X kernel).
2965 Pre-installed versions of Mac OS X may not include any developer tools,
2966 meaning that you will not be able to build GCC from source. Tool
2967 binaries are available at
2968 @uref{http://developer.apple.com/tools/compilers.html} (free
2969 registration required).
2971 The default stack limit of 512K is too small, which may cause compiles
2972 to fail with 'Bus error'. Set the stack larger, for instance
2973 by doing @samp{limit stack 800}. It's a good idea to use the GNU
2974 preprocessor instead of Apple's @file{cpp-precomp} during the first stage of
2975 bootstrapping; this is automatic when doing @samp{make bootstrap}, but
2976 to do it from the toplevel objdir you will need to say @samp{make
2977 CC='cc -no-cpp-precomp' bootstrap}.
2979 The version of GCC shipped by Apple typically includes a number of
2980 extensions not available in a standard GCC release. These extensions
2981 are generally specific to Mac programming.
2986 @heading @anchor{powerpc-*-elf}powerpc-*-elf, powerpc-*-sysv4
2987 PowerPC system in big endian mode, running System V.4.
2992 @heading @anchor{powerpc-*-linux-gnu*}powerpc-*-linux-gnu*
2995 @uref{ftp://ftp.kernel.org/pub/linux/devel/binutils,,binutils 2.13.90.0.10}
2996 or newer for a working GCC@.
3001 @heading @anchor{powerpc-*-netbsd*}powerpc-*-netbsd*
3002 PowerPC system in big endian mode running NetBSD@. To build the
3003 documentation you will need Texinfo version 4.2 (NetBSD 1.5.1 included
3004 Texinfo version 3.12).
3009 @heading @anchor{powerpc-*-eabisim}powerpc-*-eabisim
3010 Embedded PowerPC system in big endian mode for use in running under the
3016 @heading @anchor{powerpc-*-eabi}powerpc-*-eabi
3017 Embedded PowerPC system in big endian mode.
3022 @heading @anchor{powerpcle-*-elf}powerpcle-*-elf, powerpcle-*-sysv4
3023 PowerPC system in little endian mode, running System V.4.
3028 @heading @anchor{powerpcle-*-eabisim}powerpcle-*-eabisim
3029 Embedded PowerPC system in little endian mode for use in running under
3035 @heading @anchor{powerpcle-*-eabi}powerpcle-*-eabi
3036 Embedded PowerPC system in little endian mode.
3041 @heading @anchor{powerpcle-*-winnt}powerpcle-*-winnt, powerpcle-*-pe
3042 PowerPC system in little endian mode running Windows NT@.
3047 @heading @anchor{s390-*-linux*}s390-*-linux*
3048 S/390 system running Linux for S/390@.
3053 @heading @anchor{s390x-*-linux*}s390x-*-linux*
3054 zSeries system (64-bit) running Linux for zSeries@.
3059 @c Please use Solaris 2 to refer to all release of Solaris, starting
3060 @c with 2.0 until 2.6, 7, and 8. Solaris 1 was a marketing name for
3061 @c SunOS 4 releases which we don't use to avoid confusion. Solaris
3062 @c alone is too unspecific and must be avoided.
3063 @heading @anchor{*-*-solaris2*}*-*-solaris2*
3065 Sun does not ship a C compiler with Solaris 2. To bootstrap and install
3066 GCC you first have to install a pre-built compiler, see our
3067 @uref{binaries.html,,binaries page} for details.
3069 The Solaris 2 @command{/bin/sh} will often fail to configure
3070 @file{libstdc++-v3}, @file{boehm-gc} or @file{libjava}. We therefore
3071 recommend to set @env{CONFIG_SHELL} to @command{/bin/ksh} in your
3074 Solaris 2 comes with a number of optional OS packages. Some of these
3075 are needed to use GCC fully, namely @code{SUNWarc},
3076 @code{SUNWbtool}, @code{SUNWesu}, @code{SUNWhea}, @code{SUNWlibm},
3077 @code{SUNWsprot}, and @code{SUNWtoo}. If you did not install all
3078 optional packages when installing Solaris 2, you will need to verify that
3079 the packages that GCC needs are installed.
3081 To check whether an optional package is installed, use
3082 the @command{pkginfo} command. To add an optional package, use the
3083 @command{pkgadd} command. For further details, see the Solaris 2
3086 Trying to use the linker and other tools in
3087 @file{/usr/ucb} to install GCC has been observed to cause trouble.
3088 For example, the linker may hang indefinitely. The fix is to remove
3089 @file{/usr/ucb} from your @env{PATH}.
3091 All releases of GNU binutils prior to 2.11.2 have known bugs on this
3092 platform. We recommend the use of GNU binutils 2.11.2 or the vendor
3093 tools (Sun @command{as}, Sun @command{ld}).
3095 Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
3096 newer: @command{g++} will complain that types are missing. These headers assume
3097 that omitting the type means @code{int}; this assumption worked for C89 but
3098 is wrong for C++, and is now wrong for C99 also.
3100 @command{g++} accepts such (invalid) constructs with the option
3101 @option{-fpermissive}; it
3102 will assume that any missing type is @code{int} (as defined by C89).
3104 There are patches for Solaris 2.6 (105633-56 or newer for SPARC,
3105 106248-42 or newer for Intel), Solaris 7 (108376-21 or newer for SPARC,
3106 108377-20 for Intel), and Solaris 8 (108652-24 or newer for SPARC,
3107 108653-22 for Intel) that fix this bug.
3112 @heading @anchor{sparc-sun-solaris2*}sparc-sun-solaris2*
3114 When GCC is configured to use binutils 2.11.2 or later the binaries
3115 produced are smaller than the ones produced using Sun's native tools;
3116 this difference is quite significant for binaries containing debugging
3119 Sun @command{as} 4.x is broken in that it cannot cope with long symbol names.
3120 A typical error message might look similar to the following:
3123 /usr/ccs/bin/as: "/var/tmp/ccMsw135.s", line 11041: error:
3124 can't compute value of an expression involving an external symbol.
3127 This is Sun bug 4237974. This is fixed with patch 108908-02 for Solaris
3128 2.6 and has been fixed in later (5.x) versions of the assembler,
3129 starting with Solaris 7.
3131 Starting with Solaris 7, the operating system is capable of executing
3132 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
3133 this; the @option{-m64} option enables 64-bit code generation.
3134 However, if all you want is code tuned for the UltraSPARC CPU, you
3135 should try the @option{-mtune=ultrasparc} option instead, which produces
3136 code that, unlike full 64-bit code, can still run on non-UltraSPARC
3139 When configuring on a Solaris 7 or later system that is running a kernel
3140 that supports only 32-bit binaries, one must configure with
3141 @option{--disable-multilib}, since we will not be able to build the
3142 64-bit target libraries.
3147 @heading @anchor{sparc-sun-solaris2.7}sparc-sun-solaris2.7
3149 Sun patch 107058-01 (1999-01-13) for Solaris 7/SPARC triggers a bug in
3150 the dynamic linker. This problem (Sun bug 4210064) affects GCC 2.8
3151 and later, including all EGCS releases. Sun formerly recommended
3152 107058-01 for all Solaris 7 users, but around 1999-09-01 it started to
3153 recommend it only for people who use Sun's compilers.
3155 Here are some workarounds to this problem:
3158 Do not install Sun patch 107058-01 until after Sun releases a
3159 complete patch for bug 4210064. This is the simplest course to take,
3160 unless you must also use Sun's C compiler. Unfortunately 107058-01
3161 is preinstalled on some new Solaris 7-based hosts, so you may have to
3165 Copy the original, unpatched Solaris 7
3166 @command{/usr/ccs/bin/as} into
3167 @command{/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.1/as},
3168 adjusting the latter name to fit your local conventions and software
3172 Install Sun patch 106950-03 (1999-05-25) or later. Nobody with
3173 both 107058-01 and 106950-03 installed has reported the bug with GCC
3174 and Sun's dynamic linker. This last course of action is riskiest,
3175 for two reasons. First, you must install 106950 on all hosts that
3176 run code generated by GCC; it doesn't suffice to install it only on
3177 the hosts that run GCC itself. Second, Sun says that 106950-03 is
3178 only a partial fix for bug 4210064, but Sun doesn't know whether the
3179 partial fix is adequate for GCC@. Revision -08 or later should fix
3180 the bug. The current (as of 2001-09-24) revision is -14, and is included in
3181 the Solaris 7 Recommended Patch Cluster.
3189 @heading @anchor{sparc-sun-sunos4*}sparc-sun-sunos4*
3190 Support for this system is obsoleted in GCC 3.3.
3192 A bug in the SunOS 4 linker will cause it to crash when linking
3193 @option{-fPIC} compiled objects (and will therefore not allow you to build
3196 To fix this problem you can either use the most recent version of
3197 binutils or get the latest SunOS 4 linker patch (patch ID 100170-10)
3198 from Sun's patch site.
3200 Sometimes on a Sun 4 you may observe a crash in the program
3201 @command{genflags} or @command{genoutput} while building GCC. This is said to
3202 be due to a bug in @command{sh}. You can probably get around it by running
3203 @command{genflags} or @command{genoutput} manually and then retrying the
3209 @heading @anchor{sparc-unknown-linux-gnulibc1}sparc-unknown-linux-gnulibc1
3210 Support for this system is obsoleted in GCC 3.3.
3212 It has been reported that you might need
3213 @uref{ftp://ftp.yggdrasil.com/private/hjl,,binutils 2.8.1.0.23}
3214 for this platform, too.
3220 @heading @anchor{sparc-*-linux*}sparc-*-linux*
3222 GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
3223 or newer on this platform. All earlier binutils and glibc
3224 releases mishandled unaligned relocations on @code{sparc-*-*} targets.
3230 @heading @anchor{sparc64-*-*}sparc64-*-*
3232 GCC version 2.95 is not able to compile code correctly for
3233 @code{sparc64} targets. Users of the Linux kernel, at least,
3234 can use the @code{sparc32} program to start up a new shell
3235 invocation with an environment that causes @command{configure} to
3236 recognize (via @samp{uname -a}) the system as @samp{sparc-*-*} instead.
3241 @heading @anchor{sparcv9-*-solaris2*}sparcv9-*-solaris2*
3243 The following compiler flags must be specified in the configure
3244 step in order to bootstrap this target with the Sun compiler:
3247 % CC="cc -xildoff -xarch=v9" @var{srcdir}/configure [@var{options}] [@var{target}]
3250 @option{-xildoff} turns off the incremental linker, and @option{-xarch=v9}
3251 specifies the v9 architecture to the Sun linker and assembler.
3256 @heading @anchor{#*-*-sysv*}*-*-sysv*
3257 On System V release 3, you may get this error message
3261 ld fatal: failed to write symbol name @var{something}
3262 in strings table for file @var{whatever}
3265 This probably indicates that the disk is full or your ulimit won't allow
3266 the file to be as large as it needs to be.
3268 This problem can also result because the kernel parameter @code{MAXUMEM}
3269 is too small. If so, you must regenerate the kernel and make the value
3270 much larger. The default value is reported to be 1024; a value of 32768
3271 is said to work. Smaller values may also work.
3273 On System V, if you get an error like this,
3276 /usr/local/lib/bison.simple: In function `yyparse':
3277 /usr/local/lib/bison.simple:625: virtual memory exhausted
3281 that too indicates a problem with disk space, ulimit, or @code{MAXUMEM}.
3283 On a System V release 4 system, make sure @file{/usr/bin} precedes
3284 @file{/usr/ucb} in @code{PATH}. The @command{cc} command in
3285 @file{/usr/ucb} uses libraries which have bugs.
3290 @heading @anchor{vax-dec-ultrix}vax-dec-ultrix
3291 Don't try compiling with VAX C (@command{vcc}). It produces incorrect code
3292 in some cases (for example, when @code{alloca} is used).
3297 @heading @anchor{*-*-vxworks*}*-*-vxworks*
3298 Support for VxWorks is in flux. At present GCC supports @emph{only} the
3299 very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
3300 We welcome patches for other architectures supported by VxWorks 5.5.
3301 Support for VxWorks AE would also be welcome; we believe this is merely
3302 a matter of writing an appropriate ``configlette'' (see below). We are
3303 not interested in supporting older, a.out or COFF-based, versions of
3306 VxWorks comes with an older version of GCC installed in
3307 @file{@var{$WIND_BASE}/host}; we recommend you do not overwrite it.
3308 Choose an installation @var{prefix} entirely outside @var{$WIND_BASE}.
3309 Before running @command{configure}, create the directories @file{@var{prefix}}
3310 and @file{@var{prefix}/bin}. Link or copy the appropriate assembler,
3311 linker, etc. into @file{@var{prefix}/bin}, and set your @var{PATH} to
3312 include that directory while running both @command{configure} and
3315 You must give @command{configure} the
3316 @option{--with-headers=@var{$WIND_BASE}/target/h} switch so that it can
3317 find the VxWorks system headers. Since VxWorks is a cross compilation
3318 target only, you must also specify @option{--target=@var{target}}.
3319 @command{configure} will attempt to create the directory
3320 @file{@var{prefix}/@var{target}/sys-include} and copy files into it;
3321 make sure the user running @command{configure} has sufficient privilege
3324 GCC's exception handling runtime requires a special ``configlette''
3325 module, @file{contrib/gthr_supp_vxw_5x.c}. Follow the instructions in
3326 that file to add the module to your kernel build. (Future versions of
3327 VxWorks will incorporate this module.)
3332 @heading @anchor{xtensa-*-elf}xtensa-*-elf
3334 This target is intended for embedded Xtensa systems using the
3335 @samp{newlib} C library. It uses ELF but does not support shared
3336 objects. Designed-defined instructions specified via the
3337 Tensilica Instruction Extension (TIE) language are only supported
3338 through inline assembly.
3340 The Xtensa configuration information must be specified prior to
3341 building GCC@. The @file{gcc/config/xtensa/xtensa-config.h} header
3342 file contains the configuration information. If you created your
3343 own Xtensa configuration with the Xtensa Processor Generator, the
3344 downloaded files include a customized copy of this header file,
3345 which you can use to replace the default header file.
3350 @heading @anchor{xtensa-*-linux*}xtensa-*-linux*
3352 This target is for Xtensa systems running GNU/Linux. It supports ELF
3353 shared objects and the GNU C library (glibc). It also generates
3354 position-independent code (PIC) regardless of whether the
3355 @option{-fpic} or @option{-fPIC} options are used. In other
3356 respects, this target is the same as the
3357 @uref{#xtensa-*-elf,,@samp{xtensa-*-elf}} target.
3362 @heading @anchor{windows}Microsoft Windows (32-bit)
3364 A port of GCC 2.95.x is included with the
3365 @uref{http://www.cygwin.com/,,Cygwin environment}.
3367 Current (as of early 2001) snapshots of GCC will build under Cygwin
3368 without modification.
3373 @heading @anchor{os2}OS/2
3375 GCC does not currently support OS/2. However, Andrew Zabolotny has been
3376 working on a generic OS/2 port with pgcc. The current code can be found
3377 at @uref{http://www.goof.com/pcg/os2/,,http://www.goof.com/pcg/os2/}.
3379 An older copy of GCC 2.8.1 is included with the EMX tools available at
3380 @uref{ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/,,
3381 ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/}.
3386 @heading @anchor{older}Older systems
3388 GCC contains support files for many older (1980s and early
3389 1990s) Unix variants. For the most part, support for these systems
3390 has not been deliberately removed, but it has not been maintained for
3391 several years and may suffer from bitrot.
3393 Starting with GCC 3.1, each release has a list of ``obsoleted'' systems.
3394 Support for these systems is still present in that release, but
3395 @command{configure} will fail unless the @option{--enable-obsolete}
3396 option is given. Unless a maintainer steps forward, support for these
3397 systems will be removed from the next release of GCC@.
3399 Support for old systems as hosts for GCC can cause problems if the
3400 workarounds for compiler, library and operating system bugs affect the
3401 cleanliness or maintainability of the rest of GCC@. In some cases, to
3402 bring GCC up on such a system, if still possible with current GCC, may
3403 require first installing an old version of GCC which did work on that
3404 system, and using it to compile a more recent GCC, to avoid bugs in the
3405 vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
3406 @file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror
3407 sites}. Header bugs may generally be avoided using
3408 @command{fixincludes}, but bugs or deficiencies in libraries and the
3409 operating system may still cause problems.
3411 Support for older systems as targets for cross-compilation is less
3412 problematic than support for them as hosts for GCC; if an enthusiast
3413 wishes to make such a target work again (including resurrecting any of
3414 the targets that never worked with GCC 2, starting from the last CVS
3415 version before they were removed), patches
3416 @uref{../contribute.html,,following the usual requirements} would be
3417 likely to be accepted, since they should not affect the support for more
3420 For some systems, old versions of GNU binutils may also be useful,
3421 and are available from @file{pub/binutils/old-releases} on
3422 @uref{http://sources.redhat.com/mirrors.html,,sources.redhat.com mirror sites}.
3424 Some of the information on specific systems above relates to
3425 such older systems, but much of the information
3426 about GCC on such systems (which may no longer be applicable to
3427 current GCC) is to be found in the GCC texinfo manual.
3432 @heading @anchor{elf_targets}all ELF targets (SVR4, Solaris 2, etc.)
3434 C++ support is significantly better on ELF targets if you use the
3435 @uref{./configure.html#with-gnu-ld,,GNU linker}; duplicate copies of
3436 inlines, vtables and template instantiations will be discarded
3445 @uref{./index.html,,Return to the GCC Installation page}
3449 @c ***Old documentation******************************************************
3451 @include install-old.texi
3457 @uref{./index.html,,Return to the GCC Installation page}
3461 @c ***GFDL********************************************************************
3469 @uref{./index.html,,Return to the GCC Installation page}
3473 @c ***************************************************************************
3474 @c Part 6 The End of the Document
3476 @comment node-name, next, previous, up
3477 @node Concept Index, , GNU Free Documentation License, Top
3481 @unnumbered Concept Index