libstdc++-v3/configure.ac

   1 # Process this file with autoconf to produce a configure script, like so:
   2 # aclocal && autoconf && autoheader && automake
   3
   4 AC_PREREQ(2.57)
   5 AC_INIT(package-unused, version-unused,, libstdc++)
   6 AC_CONFIG_SRCDIR(src/ios.cc)
   7 AC_CONFIG_HEADER(config.h)
   8
   9 # This works around the fact that libtool configuration may change LD
  10 # for this particular configuration, but some shells, instead of
  11 # keeping the changes in LD private, export them just because LD is
  12 # exported.  Only used at the end of this file.
  13 ### am handles this now?  ORIGINAL_LD_FOR_MULTILIBS=$LD
  14
  15 # For libtool versioning info, format is CURRENT:REVISION:AGE
  16 libtool_VERSION=6:0:0
  17 AC_SUBST(libtool_VERSION)
  18
  19 # Find the rest of the source tree framework.
  20 GLIBCXX_TOPREL_CONFIGURE
  21
  22 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
  23 #
  24 # You will slowly go insane if you do not grok the following fact:  when
  25 # building v3 as part of the compiler, the top-level /target/ becomes the
  26 # library's /host/.  configure then causes --target to default to --host,
  27 # exactly like any other package using autoconf.  Therefore, 'target' and
  28 # 'host' will always be the same.  This makes sense both for native and
  29 # cross compilers, just think about it for a little while.  :-)
  30 #
  31 # Also, if v3 is being configured as part of a cross compiler, the top-level
  32 # configure script will pass the "real" host as $with_cross_host.
  33 #
  34 # Do not delete or change the following two lines.  For why, see
  35 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
  36 AC_CANONICAL_SYSTEM
  37 target_alias=${target_alias-$host_alias}
  38
  39 # Handy for debugging:
  40 #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5
  41
  42 if test "$build" != "$host"; then
  43   # We are being configured with some form of cross compiler.
  44   GLIBCXX_IS_NATIVE=false
  45   # GCC_NO_EXECUTABLES
  46 else
  47   GLIBCXX_IS_NATIVE=true
  48 fi
  49
  50 # Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
  51 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
  52 #  1.x:  minimum required version
  53 #  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
  54 #              of other PACKAGE_* variables will, however, and there's nothing
  55 #              we can do about that; they come from AC_INIT).
  56 #  foreign:  we don't follow the normal rules for GNU packages (no COPYING
  57 #            file in the top srcdir, etc, etc), so stop complaining.
  58 #  no-dependencies:  turns off auto dependency generation (just for now)
  59 #  -Wall:  turns on all automake warnings
  60 AM_INIT_AUTOMAKE([1.7.6 no-define foreign no-dependencies -Wall])
  61
  62 # Runs configure.host, finds CC, CXX, and assorted other critical bits.  Sets
  63 # up critical shell variables.
  64 GLIBCXX_CONFIGURE
  65
  66 #AC_MSG_NOTICE([====== Starting libtool configuration])
  67 AC_LIBTOOL_DLOPEN
  68 AM_PROG_LIBTOOL
  69 AC_SUBST(enable_shared)
  70 AC_SUBST(enable_static)
  71 #AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10
  72
  73 # Possibly disable most of the library.
  74 ## XXX Consider skipping unncessary tests altogether in this case, rather
  75 ## than just ignoring the results.  Faster /and/ more correct, win win.
  76 GLIBCXX_ENABLE_HOSTED
  77
  78 # Check for support bits and g++ features that don't require linking.
  79 GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
  80 GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS
  81 GLIBCXX_ENABLE_PCH($is_hosted)
  82
  83 # Enable all the variable C++ runtime options.
  84 # NB: C_MBCHAR must come early.
  85 GLIBCXX_ENABLE_CSTDIO
  86 GLIBCXX_ENABLE_CLOCALE
  87 GLIBCXX_ENABLE_CHEADERS($c_model)  dnl c_model from configure.host
  88 GLIBCXX_ENABLE_C_MBCHAR([yes])
  89 GLIBCXX_ENABLE_C99([yes])
  90 GLIBCXX_ENABLE_LONG_LONG([yes])
  91 GLIBCXX_ENABLE_THREADS
  92 GLIBCXX_ENABLE_CONCEPT_CHECKS([no])
  93 GLIBCXX_ENABLE_DEBUG_FLAGS(["-g3 -O0"])
  94 GLIBCXX_ENABLE_DEBUG([no])
  95 GLIBCXX_ENABLE_CXX_FLAGS
  96
  97 # No surprises, no surprises...
  98 if test $atomicity_include_dir = cpu/generic ; then
  99   AC_MSG_WARN([No native atomic operations are provided for this platform.])
 100   if test $target_thread_file = single; then
 101     AC_MSG_WARN([They cannot be faked when thread support is disabled.])
 102     AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
 103   else
 104     AC_MSG_WARN([They will be faked using a mutex.])
 105     AC_MSG_WARN([Performance of certain classes will degrade as a result.])
 106   fi
 107 fi
 108
 109
 110 if $GLIBCXX_IS_NATIVE; then
 111
 112   # We can do more elaborate tests that assume a working linker.
 113   CANADIAN=no
 114
 115   # Check for available headers.
 116   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 117   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h \
 118   sys/types.h])
 119
 120   GLIBCXX_CHECK_COMPILER_FEATURES
 121   GLIBCXX_CHECK_LINKER_FEATURES
 122   GLIBCXX_CHECK_MATH_SUPPORT
 123   GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
 124   GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
 125   GLIBCXX_CHECK_WCHAR_T_SUPPORT
 126   GLIBCXX_CHECK_STDLIB_SUPPORT
 127
 128   # For showmanyc_helper().
 129   AC_CHECK_HEADERS(sys/ioctl.h sys/filio.h)
 130   GLIBCXX_CHECK_POLL
 131   GLIBCXX_CHECK_S_ISREG_OR_S_IFREG
 132
 133   # For xsputn_2().
 134   AC_CHECK_HEADERS(sys/uio.h)
 135   GLIBCXX_CHECK_WRITEV
 136
 137   AC_LC_MESSAGES
 138
 139   AC_TRY_COMPILE(
 140     [#include <setjmp.h>],
 141     [sigjmp_buf env;
 142      while (! sigsetjmp (env, 1))
 143        siglongjmp (env, 1);
 144     ],
 145     [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.])])
 146
 147   AC_FUNC_MMAP
 148
 149 else
 150
 151   # This lets us hard-code the functionality we know we'll have in the cross
 152   # target environment.  "Let" is a sugar-coated word placed on an especially
 153   # dull and tedious hack, actually.
 154   #
 155   # Here's why GLIBCXX_CHECK_MATH_SUPPORT, and other autoconf macros
 156   # that involve linking, can't be used:
 157   #    "cannot open sim-crt0.o"
 158   #    "cannot open crt0.o"
 159   # etc.  All this is because there currently exists no unified, consistent
 160   # way for top level CC information to be passed down to target directories:
 161   # newlib includes, newlib linking info, libgloss versus newlib crt0.o, etc.
 162   # When all of that is done, all of this hokey, excessive AC_DEFINE junk for
 163   # crosses can be removed.
 164
 165   # If Canadian cross, then don't pick up tools from the build directory.
 166   # Used only in GLIBCXX_EXPORT_INCLUDES.
 167   if test -n "$with_cross_host" &&
 168      test x"$build" != x"$with_cross_host" &&
 169      test x"$build" != x"$target";
 170   then
 171     CANADIAN=yes
 172   else
 173     CANADIAN=no
 174   fi
 175
 176   # Construct crosses by hand, eliminating bits that need ld...
 177   # GLIBCXX_CHECK_COMPILER_FEATURES
 178   # GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
 179   # GLIBCXX_CHECK_MATH_SUPPORT
 180
 181   # First, test for "known" system libraries.  We may be using newlib even
 182   # on a hosted environment.
 183   if test "x${with_newlib}" = "xyes"; then
 184     os_include_dir="os/newlib"
 185     AC_DEFINE(HAVE_HYPOT)
 186
 187     # GLIBCXX_CHECK_STDLIB_SUPPORT
 188     AC_DEFINE(HAVE_STRTOF)
 189     AC_DEFINE(HAVE_STRTOLD)
 190     # AC_FUNC_MMAP
 191     AC_DEFINE(HAVE_MMAP)
 192
 193     AC_DEFINE(HAVE_ACOSF)
 194     AC_DEFINE(HAVE_ASINF)
 195     AC_DEFINE(HAVE_ATAN2F)
 196     AC_DEFINE(HAVE_ATANF)
 197     AC_DEFINE(HAVE_CEILF)
 198     AC_DEFINE(HAVE_COPYSIGN)
 199     AC_DEFINE(HAVE_COPYSIGNF)
 200     AC_DEFINE(HAVE_COSF)
 201     AC_DEFINE(HAVE_COSHF)
 202     AC_DEFINE(HAVE_EXPF)
 203     AC_DEFINE(HAVE_FABSF)
 204     AC_DEFINE(HAVE_FLOORF)
 205     AC_DEFINE(HAVE_FMODF)
 206     AC_DEFINE(HAVE_FREXPF)
 207     AC_DEFINE(HAVE_LDEXPF)
 208     AC_DEFINE(HAVE_LOG10F)
 209     AC_DEFINE(HAVE_LOGF)
 210     AC_DEFINE(HAVE_MODFF)
 211     AC_DEFINE(HAVE_POWF)
 212     AC_DEFINE(HAVE_SINF)
 213     AC_DEFINE(HAVE_SINHF)
 214     AC_DEFINE(HAVE_SQRTF)
 215     AC_DEFINE(HAVE_TANF)
 216     AC_DEFINE(HAVE_TANHF)
 217   else
 218     m4_include([crossconfig.m4])
 219   fi
 220
 221   # At some point, we should differentiate between architectures
 222   # like x86, which have long double versions, and alpha/powerpc/etc.,
 223   # which don't. For the time being, punt.
 224   if test x"long_double_math_on_this_cpu" = x"yes"; then
 225     AC_DEFINE(HAVE_ACOSL)
 226     AC_DEFINE(HAVE_ASINL)
 227     AC_DEFINE(HAVE_ATAN2L)
 228     AC_DEFINE(HAVE_ATANL)
 229     AC_DEFINE(HAVE_CEILL)
 230     AC_DEFINE(HAVE_COPYSIGNL)
 231     AC_DEFINE(HAVE_COSL)
 232     AC_DEFINE(HAVE_COSHL)
 233     AC_DEFINE(HAVE_EXPL)
 234     AC_DEFINE(HAVE_FABSL)
 235     AC_DEFINE(HAVE_FLOORL)
 236     AC_DEFINE(HAVE_FMODL)
 237     AC_DEFINE(HAVE_FREXPL)
 238     AC_DEFINE(HAVE_LDEXPL)
 239     AC_DEFINE(HAVE_LOG10L)
 240     AC_DEFINE(HAVE_LOGL)
 241     AC_DEFINE(HAVE_MODFL)
 242     AC_DEFINE(HAVE_POWL)
 243     AC_DEFINE(HAVE_SINCOSL)
 244     AC_DEFINE(HAVE_SINL)
 245     AC_DEFINE(HAVE_SINHL)
 246     AC_DEFINE(HAVE_SQRTL)
 247     AC_DEFINE(HAVE_TANL)
 248     AC_DEFINE(HAVE_TANHL)
 249   fi
 250
 251 fi
 252
 253 # This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
 254 GLIBCXX_ENABLE_SYMVERS([yes])
 255
 256 # This depends on GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE.
 257 GLIBCXX_CONFIGURE_TESTSUITE
 258
 259 # Propagate the target-specific source directories through the build chain.
 260 # (Nothing currently uses cpu_include_dir directly; only atomicity_include_dir
 261 # uses it, and it only gets used in this file.)
 262 ATOMICITY_INC_SRCDIR=config/${atomicity_include_dir}
 263 OS_INC_SRCDIR=config/${os_include_dir}
 264 FPOS_INC_SRCDIR=config/${fpos_include_dir}
 265 AC_SUBST(ATOMICITY_INC_SRCDIR)
 266 AC_SUBST(FPOS_INC_SRCDIR)
 267 AC_SUBST(OS_INC_SRCDIR)
 268
 269 # Determine cross-compile flags and AM_CONDITIONALs.
 270 #AC_SUBST(GLIBCXX_IS_NATIVE)
 271 #AM_CONDITIONAL(CANADIAN, test $CANADIAN = yes)
 272 # from GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT:
 273 #AM_CONDITIONAL(GLIBCXX_BUILD_LIBMATH,  test $need_libmath = yes)
 274 GLIBCXX_EVALUATE_CONDITIONALS
 275
 276 AC_CACHE_SAVE
 277
 278 if test ${multilib} = yes; then
 279   multilib_arg="--enable-multilib"
 280 else
 281   multilib_arg=
 282 fi
 283
 284 # Export all the install information.
 285 GLIBCXX_EXPORT_INSTALL_INFO
 286
 287 # Export all the include and flag information to Makefiles.
 288 GLIBCXX_EXPORT_INCLUDES
 289 GLIBCXX_EXPORT_FLAGS
 290
 291 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
 292    grep "enable shared" > /dev/null;
 293 then
 294   LIBSUPCXX_PICFLAGS=-prefer-pic
 295 else
 296   LIBSUPCXX_PICFLAGS=
 297 fi
 298 AC_SUBST(LIBSUPCXX_PICFLAGS)
 299
 300 dnl In autoconf 2.5x, AC_OUTPUT is replaced by four AC_CONFIG_* macros,
 301 dnl which can all be called multiple times as needed, plus one (different)
 302 dnl AC_OUPUT macro.  This one lists the files to be created:
 303 AC_CONFIG_FILES( \
 304   Makefile \
 305   AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ])
 306   )
 307 AC_CONFIG_FILES([scripts/check_survey],[chmod +x scripts/check_survey])
 308 AC_CONFIG_FILES([scripts/testsuite_flags],[chmod +x scripts/testsuite_flags])
 309
 310 dnl These commands are run at the end of config.status:
 311 AC_CONFIG_COMMANDS([default],
 312 [if test -n "$CONFIG_FILES"; then
 313    # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
 314    # that multilib installs will end up installed in the correct place.
 315    # The testsuite needs it for multilib-aware ABI baseline files.
 316    # To work around this not being passed down from config-ml.in ->
 317    # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
 318    # append it here.  Only modify Makefiles that have just been created.
 319    #
 320    # Also, get rid of this simulated-VPATH thing that automake does.
 321    cat > vpsed << \_EOF
 322 s!`test -f '$<' || echo '$(srcdir)/'`!!
 323 _EOF
 324    for i in $SUBDIRS; do
 325     case $CONFIG_FILES in
 326      *${i}/Makefile*)
 327        #echo "Adding MULTISUBDIR to $i/Makefile"
 328        sed -f vpsed $i/Makefile > tmp
 329        grep '^MULTISUBDIR =' Makefile >> tmp
 330        mv tmp $i/Makefile
 331        ;;
 332     esac
 333    done
 334    rm vpsed
 335  fi
 336  (cd include && ${MAKE-make})
 337 ],
 338 [
 339 # Variables needed in config.status (file generation) which aren't already
 340 # passed by autoconf.
 341 SUBDIRS="$SUBDIRS"
 342 ])
 343
 344 dnl And this actually makes things happen:
 345 AC_OUTPUT