libstdc++-v3/configure.ac

   1 # Process this file with autoreconf to produce a configure script.
   2
   3 AC_PREREQ(2.64)
   4 AC_INIT(package-unused, version-unused,, libstdc++)
   5 AC_CONFIG_SRCDIR(src/ios.cc)
   6 AC_CONFIG_HEADER(config.h)
   7
   8 # This works around the fact that libtool configuration may change LD
   9 # for this particular configuration, but some shells, instead of
  10 # keeping the changes in LD private, export them just because LD is
  11 # exported.  Only used at the end of this file.
  12 ### am handles this now?  ORIGINAL_LD_FOR_MULTILIBS=$LD
  13
  14 # For libtool versioning info, format is CURRENT:REVISION:AGE
  15 libtool_VERSION=6:14:0
  16 AC_SUBST(libtool_VERSION)
  17
  18 # Find the rest of the source tree framework.
  19 AM_ENABLE_MULTILIB(, ..)
  20
  21 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
  22 #
  23 # You will slowly go insane if you do not grok the following fact:  when
  24 # building v3 as part of the compiler, the top-level /target/ becomes the
  25 # library's /host/.  configure then causes --target to default to --host,
  26 # exactly like any other package using autoconf.  Therefore, 'target' and
  27 # 'host' will always be the same.  This makes sense both for native and
  28 # cross compilers, just think about it for a little while.  :-)
  29 #
  30 # Also, if v3 is being configured as part of a cross compiler, the top-level
  31 # configure script will pass the "real" host as $with_cross_host.
  32 #
  33 # Do not delete or change the following two lines.  For why, see
  34 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
  35 AC_CANONICAL_SYSTEM
  36 target_alias=${target_alias-$host_alias}
  37
  38 # Handy for debugging:
  39 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
  40
  41 if test "$build" != "$host"; then
  42   # We are being configured with some form of cross compiler.
  43   GLIBCXX_IS_NATIVE=false
  44   case "$host","$target" in
  45     # Darwin crosses can use the host system's libraries and headers,
  46     # because of the fat library support.  Of course, it must be the
  47     # same version of Darwin on both sides.  Allow the user to
  48     # just say --target=foo-darwin without a version number to mean
  49     # "the version on this system".
  50       *-*-darwin*,*-*-darwin*)
  51         hostos=`echo $host | sed 's/.*-darwin/darwin/'`
  52         targetos=`echo $target | sed 's/.*-darwin/darwin/'`
  53         if test $hostos = $targetos -o $targetos = darwin ; then
  54           GLIBCXX_IS_NATIVE=true
  55         fi
  56         ;;
  57
  58       *)
  59         GCC_NO_EXECUTABLES
  60         ;;
  61   esac
  62 else
  63   GLIBCXX_IS_NATIVE=true
  64 fi
  65
  66 # Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
  67 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
  68 #  1.x:  minimum required version
  69 #  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
  70 #              of other PACKAGE_* variables will, however, and there's nothing
  71 #              we can do about that; they come from AC_INIT).
  72 #  foreign:  we don't follow the normal rules for GNU packages (no COPYING
  73 #            file in the top srcdir, etc, etc), so stop complaining.
  74 #  no-dependencies:  turns off auto dependency generation (just for now)
  75 #  -Wall:  turns on all automake warnings...
  76 #  -Wno-portability:  ...except this one, since GNU make is now required.
  77 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dependencies -Wall -Wno-portability -Wno-override])
  78 AH_TEMPLATE(PACKAGE, [Name of package])
  79 AH_TEMPLATE(VERSION, [Version number of package])
  80
  81 # We're almost certainly being configured before anything else which uses
  82 # C++, so all of our AC_PROG_* discoveries will be cached.  It's vital that
  83 # we not cache the value of CXX that we "discover" here, because it's set
  84 # to something unique for us and libjava.  Other target libraries need to
  85 # find CXX for themselves.  We yank the rug out from under the normal AC_*
  86 # process by sneakily renaming the cache variable.  This also lets us debug
  87 # the value of "our" CXX in postmortems.
  88 #
  89 # We must also force CXX to /not/ be a precious variable, otherwise the
  90 # wrong (non-multilib-adjusted) value will be used in multilibs.  This
  91 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS.  And as a side
  92 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
  93 # that ourselves.  Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
  94 #
  95 # -fno-builtin must be present here so that a non-conflicting form of
  96 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
  97
  98 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
  99 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
 100 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 101 save_CXXFLAGS="$CXXFLAGS"
 102 CXXFLAGS="$CXXFLAGS -fno-builtin"
 103 AC_PROG_CC
 104 AC_PROG_CXX
 105 CXXFLAGS="$save_CXXFLAGS"
 106 m4_rename_force([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 107 AC_SUBST(CFLAGS)
 108 AC_SUBST(CXXFLAGS)
 109
 110 # Runs configure.host, and assorted other critical bits.  Sets
 111 # up critical shell variables.
 112 GLIBCXX_CONFIGURE
 113
 114 if test "x${with_newlib}" != "xyes"; then
 115   AC_LIBTOOL_DLOPEN
 116 fi
 117 AM_PROG_LIBTOOL
 118 AC_SUBST(enable_shared)
 119 AC_SUBST(enable_static)
 120
 121 # Possibly disable most of the library.
 122 ## TODO: Consider skipping unncessary tests altogether in this case, rather
 123 ## than just ignoring the results.  Faster /and/ more correct, win win.
 124 GLIBCXX_ENABLE_HOSTED
 125
 126 # Enable compiler support that doesn't require linking.
 127 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
 128 GLIBCXX_ENABLE_PCH($is_hosted)
 129 GLIBCXX_ENABLE_THREADS
 130 GLIBCXX_ENABLE_ATOMIC_BUILTINS
 131 GLIBCXX_ENABLE_DECIMAL_FLOAT
 132
 133 # Checks for compiler support that doesn't require linking.
 134 GLIBCXX_CHECK_COMPILER_FEATURES
 135
 136 # Enable all the variable C++ runtime options that don't require linking.
 137 GLIBCXX_ENABLE_CSTDIO
 138 GLIBCXX_ENABLE_CLOCALE
 139 GLIBCXX_ENABLE_ALLOCATOR
 140 GLIBCXX_ENABLE_CHEADERS($c_model)  dnl c_model from configure.host
 141 GLIBCXX_ENABLE_LONG_LONG([yes])
 142 GLIBCXX_ENABLE_WCHAR_T([yes])
 143 GLIBCXX_ENABLE_C99([yes])
 144 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
 145 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
 146 GLIBCXX_ENABLE_DEBUG([no])
 147 GLIBCXX_ENABLE_PARALLEL([yes])
 148 GLIBCXX_ENABLE_CXX_FLAGS
 149 GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING([no])
 150
 151 # Checks for operating systems support that doesn't require linking.
 152 GLIBCXX_CHECK_SYSTEM_ERROR
 153
 154 # For the streamoff typedef.
 155 GLIBCXX_CHECK_INT64_T
 156
 157 # For LFS support.
 158 GLIBCXX_CHECK_LFS
 159
 160 # For showmanyc_helper().
 161 AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
 162 GLIBCXX_CHECK_POLL
 163 GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
 164
 165 # For xsputn_2().
 166 AC_CHECK_HEADERS(sys/uio.h)
 167 GLIBCXX_CHECK_WRITEV
 168
 169 # For C99 support to TR1.
 170 GLIBCXX_CHECK_C99_TR1
 171
 172 # For common values of EOF, SEEK_CUR, SEEK_END.
 173 GLIBCXX_CHECK_STDIO_MACROS
 174
 175 # For gettimeofday support.
 176 GLIBCXX_CHECK_GETTIMEOFDAY
 177
 178 # For clock_gettime, nanosleep and sched_yield support.
 179 # NB: The default is [no], because otherwise it requires linking.
 180 GLIBCXX_ENABLE_LIBSTDCXX_TIME([no])
 181
 182 # For gthread support
 183 GLIBCXX_CHECK_GTHREADS
 184
 185 AC_LC_MESSAGES
 186
 187 # Check for available headers.
 188 AC_CHECK_HEADERS([endian.h float.h fp.h ieeefp.h inttypes.h locale.h \
 189 machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
 190 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
 191 sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
 192 wchar.h wctype.h])
 193
 194 # Only do link tests if native. Else, hardcode.
 195 if $GLIBCXX_IS_NATIVE; then
 196
 197   # We can do more elaborate tests that assume a working linker.
 198   CANADIAN=no
 199
 200   GLIBCXX_CHECK_LINKER_FEATURES
 201   GLIBCXX_CHECK_MATH_SUPPORT
 202   GLIBCXX_CHECK_STDLIB_SUPPORT
 203
 204   # For /dev/random and /dev/urandom for TR1.
 205   GLIBCXX_CHECK_RANDOM_TR1
 206
 207   # For TLS support.
 208   GCC_CHECK_TLS
 209
 210   # For iconv support.
 211   AM_ICONV
 212
 213 else
 214
 215   # This lets us hard-code the functionality we know we'll have in the cross
 216   # target environment.  "Let" is a sugar-coated word placed on an especially
 217   # dull and tedious hack, actually.
 218   #
 219   # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
 220   # that involve linking, can't be used:
 221   #    "cannot open sim-crt0.o"
 222   #    "cannot open crt0.o"
 223   # etc.  All this is because there currently exists no unified, consistent
 224   # way for top level CC information to be passed down to target directories:
 225   # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
 226   # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
 227   # crosses can be removed.
 228
 229   # If Canadian cross, then don't pick up tools from the build directory.
 230   # Used only in GLIBCXX_EXPORT_INCLUDES.
 231   if test -n "$with_cross_host" &&
 232      test x"$build_alias" != x"$with_cross_host" &&
 233      test x"$build" != x"$target";
 234   then
 235     CANADIAN=yes
 236   else
 237     CANADIAN=no
 238   fi
 239
 240   # Construct crosses by hand, eliminating bits that need ld...
 241   # GLIBCXX_CHECK_MATH_SUPPORT
 242
 243   # First, test for "known" system libraries.  We may be using newlib even
 244   # on a hosted environment.
 245   if test "x${with_newlib}" = "xyes"; then
 246     os_include_dir="os/newlib"
 247     AC_DEFINE(HAVE_HYPOT)
 248
 249     # GLIBCXX_CHECK_STDLIB_SUPPORT
 250     AC_DEFINE(HAVE_STRTOF)
 251
 252     AC_DEFINE(HAVE_ACOSF)
 253     AC_DEFINE(HAVE_ASINF)
 254     AC_DEFINE(HAVE_ATAN2F)
 255     AC_DEFINE(HAVE_ATANF)
 256     AC_DEFINE(HAVE_CEILF)
 257     AC_DEFINE(HAVE_COSF)
 258     AC_DEFINE(HAVE_COSHF)
 259     AC_DEFINE(HAVE_EXPF)
 260     AC_DEFINE(HAVE_FABSF)
 261     AC_DEFINE(HAVE_FLOORF)
 262     AC_DEFINE(HAVE_FMODF)
 263     AC_DEFINE(HAVE_FREXPF)
 264     AC_DEFINE(HAVE_LDEXPF)
 265     AC_DEFINE(HAVE_LOG10F)
 266     AC_DEFINE(HAVE_LOGF)
 267     AC_DEFINE(HAVE_MODFF)
 268     AC_DEFINE(HAVE_POWF)
 269     AC_DEFINE(HAVE_SINF)
 270     AC_DEFINE(HAVE_SINHF)
 271     AC_DEFINE(HAVE_SQRTF)
 272     AC_DEFINE(HAVE_TANF)
 273     AC_DEFINE(HAVE_TANHF)
 274
 275     AC_DEFINE(HAVE_ICONV)
 276   else
 277     GLIBCXX_CROSSCONFIG
 278   fi
 279
 280   # At some point, we should differentiate between architectures
 281   # like x86, which have long double versions, and alpha/powerpc/etc.,
 282   # which don't. For the time being, punt.
 283   if test x"long_double_math_on_this_cpu" = x"yes"; then
 284     AC_DEFINE(HAVE_ACOSL)
 285     AC_DEFINE(HAVE_ASINL)
 286     AC_DEFINE(HAVE_ATAN2L)
 287     AC_DEFINE(HAVE_ATANL)
 288     AC_DEFINE(HAVE_CEILL)
 289     AC_DEFINE(HAVE_COSL)
 290     AC_DEFINE(HAVE_COSHL)
 291     AC_DEFINE(HAVE_EXPL)
 292     AC_DEFINE(HAVE_FABSL)
 293     AC_DEFINE(HAVE_FLOORL)
 294     AC_DEFINE(HAVE_FMODL)
 295     AC_DEFINE(HAVE_FREXPL)
 296     AC_DEFINE(HAVE_LDEXPL)
 297     AC_DEFINE(HAVE_LOG10L)
 298     AC_DEFINE(HAVE_LOGL)
 299     AC_DEFINE(HAVE_MODFL)
 300     AC_DEFINE(HAVE_POWL)
 301     AC_DEFINE(HAVE_SINCOSL)
 302     AC_DEFINE(HAVE_SINL)
 303     AC_DEFINE(HAVE_SINHL)
 304     AC_DEFINE(HAVE_SQRTL)
 305     AC_DEFINE(HAVE_TANL)
 306     AC_DEFINE(HAVE_TANHL)
 307   fi
 308 fi
 309
 310 # Check for _Unwind_GetIPInfo.
 311 GCC_CHECK_UNWIND_GETIPINFO
 312
 313
 314 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
 315
 316 GCC_HEADER_STDINT(include/gstdint.h)
 317
 318 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
 319 GLIBCXX_ENABLE_SYMVERS([yes])
 320 GLIBCXX_ENABLE_VISIBILITY([yes])
 321
 322 ac_ldbl_compat=no
 323 case "$target" in
 324   powerpc*-*-linux* | \
 325   powerpc*-*-gnu* | \
 326   sparc*-*-linux* | \
 327   s390*-*-linux* | \
 328   alpha*-*-linux*)
 329   AC_TRY_COMPILE(, [
 330 #if !defined __LONG_DOUBLE_128__ || (defined(__sparc__) && defined(__arch64__))
 331 #error no need for long double compatibility
 332 #endif
 333   ], [ac_ldbl_compat=yes], [ac_ldbl_compat=no])
 334   if test "$ac_ldbl_compat" = yes; then
 335     AC_DEFINE([_GLIBCXX_LONG_DOUBLE_COMPAT],1,
 336               [Define if compatibility should be provided for -mlong-double-64.])
 337     port_specific_symbol_files="\$(top_srcdir)/config/os/gnu-linux/ldbl-extra.ver"
 338   fi
 339 esac
 340 GLIBCXX_CONDITIONAL(GLIBCXX_LDBL_COMPAT, test $ac_ldbl_compat = yes)
 341
 342 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
 343 GLIBCXX_CONFIGURE_TESTSUITE
 344
 345 # Propagate the target-specific source directories through the build chain.
 346 ATOMICITY_SRCDIR=config/${atomicity_dir}
 347 ATOMIC_WORD_SRCDIR=config/${atomic_word_dir}
 348 ATOMIC_FLAGS=${atomic_flags}
 349 CPU_DEFINES_SRCDIR=config/${cpu_defines_dir}
 350 OS_INC_SRCDIR=config/${os_include_dir}
 351 ERROR_CONSTANTS_SRCDIR=config/${error_constants_dir}
 352 ABI_TWEAKS_SRCDIR=config/${abi_tweaks_dir}
 353 AC_SUBST(ATOMICITY_SRCDIR)
 354 AC_SUBST(ATOMIC_WORD_SRCDIR)
 355 AC_SUBST(ATOMIC_FLAGS)
 356 AC_SUBST(CPU_DEFINES_SRCDIR)
 357 AC_SUBST(ABI_TWEAKS_SRCDIR)
 358 AC_SUBST(OS_INC_SRCDIR)
 359 AC_SUBST(ERROR_CONSTANTS_SRCDIR)
 360
 361
 362 # Determine cross-compile flags and AM_CONDITIONALs.
 363 #AC_SUBST(GLIBCXX_IS_NATIVE)
 364 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
 365 GLIBCXX_EVALUATE_CONDITIONALS
 366
 367 AC_CACHE_SAVE
 368
 369 if test ${multilib} = yes; then
 370   multilib_arg="--enable-multilib"
 371 else
 372   multilib_arg=
 373 fi
 374
 375 # Export all the install information.
 376 GLIBCXX_EXPORT_INSTALL_INFO
 377
 378 # Export all the include and flag information to Makefiles.
 379 GLIBCXX_EXPORT_INCLUDES
 380 GLIBCXX_EXPORT_FLAGS
 381
 382 if test "$enable_shared" = yes; then
 383   LIBSUPCXX_PICFLAGS="-prefer-pic"
 384 else
 385   LIBSUPCXX_PICFLAGS=
 386 fi
 387 AC_SUBST(LIBSUPCXX_PICFLAGS)
 388
 389 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
 390 dnl which can all be called multiple times as needed, plus one (different)
 391 dnl AC_OUTPUT macro.  This one lists the files to be created:
 392 AC_CONFIG_FILES(Makefile)
 393 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
 394
 395 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
 396 # that multilib installs will end up installed in the correct place.
 397 # The testsuite needs it for multilib-aware ABI baseline files.
 398 # To work around this not being passed down from config-ml.in ->
 399 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
 400 # append it here.  Only modify Makefiles that have just been created.
 401 #
 402 # Also, get rid of this simulated-VPATH thing that automake does.
 403 AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
 404   [cat > vpsed$$ << \_EOF
 405 s!`test -f '$<' || echo '$(srcdir)/'`!!
 406 _EOF
 407    sed -f vpsed$$ $ac_file > tmp$$
 408    mv tmp$$ $ac_file
 409    rm vpsed$$
 410    echo 'MULTISUBDIR =' >> $ac_file
 411    ml_norecursion=yes
 412    . ${multi_basedir}/config-ml.in
 413    AS_UNSET([ml_norecursion])
 414 ])
 415
 416 AC_CONFIG_COMMANDS([generate-headers],
 417   [(cd include && ${MAKE-make} pch_build= )])
 418
 419 dnl And this actually makes things happen:
 420 AC_OUTPUT