libstdc++-v3/configure.in

   1 # Process this file with autoconf to produce a configure script, like so:
   2 # aclocal, autoconf, autoheader, automake
   3
   4 AC_PREREQ(2.13)
   5 AC_INIT(src/ios.cc)
   6 AC_CONFIG_AUX_DIR(..)
   7
   8 # Gets and sets build, host, target, *_vendor, *_cpu, *_os, etc.
   9 AC_CANONICAL_SYSTEM
  10
  11 # We use these options to decide which functions to include.
  12 AC_ARG_WITH(target-subdir,
  13 [  --with-target-subdir=SUBDIR
  14                            configuring in a subdirectory])
  15 AC_ARG_WITH(cross-host,
  16 [  --with-cross-host=HOST  configuring with a cross compiler])
  17
  18 # Runs configure.host and configure.target. Have to run this before
  19 # the GLIBCPP_ENABLE_* macros below.
  20 GLIBCPP_CONFIGURE(.)
  21
  22 AC_LIBTOOL_DLOPEN
  23 AM_PROG_LIBTOOL
  24 AC_SUBST(enable_shared)
  25 AC_SUBST(enable_static)
  26 GLIBCPP_CHECK_GNU_MAKE
  27   if test "x$_cv_gnu_make_command" = "x"; then
  28     AC_MSG_ERROR([GNU make not found. Please install it or correct your path.])
  29   fi
  30 AM_CONFIG_HEADER(config.h)
  31
  32 # Check for c++ or library specific bits that don't require linking.
  33 GLIBCPP_CHECK_COMPILER_VERSION
  34
  35 # Enable all the crazy c++ stuff.  C_MBCHAR must come early.
  36 GLIBCPP_ENABLE_DEBUG($USE_MAINTAINER_MODE)
  37 GLIBCPP_ENABLE_CSTDIO
  38 GLIBCPP_ENABLE_CLOCALE
  39 GLIBCPP_ENABLE_C_MBCHAR([yes])
  40 GLIBCPP_ENABLE_LONG_LONG([no])
  41 GLIBCPP_ENABLE_CHEADERS([c_std])
  42 GLIBCPP_ENABLE_THREADS
  43 GLIBCPP_ENABLE_CXX_FLAGS([none])
  44
  45 if test -n "$with_cross_host"; then
  46
  47   # We are being configured with a cross compiler.  AC_REPLACE_FUNCS
  48   # may not work correctly, because the compiler may not be able to
  49   # link executables.
  50   xcompiling=1
  51   NATIVE=no
  52
  53   # If Canadian cross, then don't pick up tools from the build
  54   # directory.
  55   if test x"$build" != x"$with_cross_host" && x"$build" != x"$target"; then
  56     CANADIAN=yes
  57     NULL_TARGET=yes
  58   else
  59     CANADIAN=no
  60     NULL_TARGET=no
  61   fi
  62
  63   case "$target_alias" in
  64     *-linux*)
  65         # Construct linux crosses by hand, eliminating bits that need ld...
  66         # Check for available headers.
  67         AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
  68         machine/endian.h machine/param.h sys/machine.h fp.h locale.h \
  69         float.h inttypes.h])
  70
  71         # GLIBCPP_CHECK_COMPILER_FEATURES
  72         WFMT_FLAGS='-fdiagnostics-show-location=once'
  73         SECTION_FLAGS='-ffunction-sections -fdata-sections'
  74         AC_SUBST(WFMT_FLAGS)
  75         AC_SUBST(SECTION_FLAGS)
  76         GLIBCPP_CHECK_LINKER_FEATURES
  77         # GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
  78         # GLIBCPP_CHECK_MATH_SUPPORT
  79         AC_DEFINE(HAVE_ACOSF)
  80         AC_DEFINE(HAVE_ASINF)
  81         AC_DEFINE(HAVE_ATAN2F)
  82         AC_DEFINE(HAVE_ATANF)
  83         AC_DEFINE(HAVE_CEILF)
  84         AC_DEFINE(HAVE_COPYSIGN)
  85         AC_DEFINE(HAVE_COPYSIGNF)
  86         AC_DEFINE(HAVE_COSF)
  87         AC_DEFINE(HAVE_COSHF)
  88         AC_DEFINE(HAVE_EXPF)
  89         AC_DEFINE(HAVE_FABSF)
  90         AC_DEFINE(HAVE_FINITE)
  91         AC_DEFINE(HAVE_FINITEF)
  92         AC_DEFINE(HAVE_FLOORF)
  93         AC_DEFINE(HAVE_FMODF)
  94         AC_DEFINE(HAVE_FREXPF)
  95         AC_DEFINE(HAVE_ISINF)
  96         AC_DEFINE(HAVE_ISINFF)
  97         AC_DEFINE(HAVE_ISNAN)
  98         AC_DEFINE(HAVE_ISNANF)
  99         AC_DEFINE(HAVE_LDEXPF)
 100         AC_DEFINE(HAVE_LOG10F)
 101         AC_DEFINE(HAVE_LOGF)
 102         AC_DEFINE(HAVE_MODFF)
 103         AC_DEFINE(HAVE_POWF)
 104         AC_DEFINE(HAVE_SINCOS)
 105         AC_DEFINE(HAVE_SINCOSF)
 106         AC_DEFINE(HAVE_SINF)
 107         AC_DEFINE(HAVE_SINHF)
 108         AC_DEFINE(HAVE_SQRTF)
 109         AC_DEFINE(HAVE_TANF)
 110         AC_DEFINE(HAVE_TANHF)
 111
 112         # At some point, we should differentiate between architectures
 113         # like x86, which have long double versions, and alpha/powerpc/etc.,
 114         # which don't. For the time being, punt.
 115         if test x"long_double_math_on_this_cpu" = x"yes"; then
 116           AC_DEFINE(HAVE_ACOSL)
 117           AC_DEFINE(HAVE_ASINL)
 118           AC_DEFINE(HAVE_ATAN2L)
 119           AC_DEFINE(HAVE_ATANL)
 120           AC_DEFINE(HAVE_CEILL)
 121           AC_DEFINE(HAVE_COPYSIGNL)
 122           AC_DEFINE(HAVE_COSL)
 123           AC_DEFINE(HAVE_COSHL)
 124           AC_DEFINE(HAVE_EXPL)
 125           AC_DEFINE(HAVE_FABSL)
 126           AC_DEFINE(HAVE_FINITEL)
 127           AC_DEFINE(HAVE_FLOORL)
 128           AC_DEFINE(HAVE_FMODL)
 129           AC_DEFINE(HAVE_FREXPL)
 130           AC_DEFINE(HAVE_ISINFL)
 131           AC_DEFINE(HAVE_ISNANL)
 132           AC_DEFINE(HAVE_LDEXPL)
 133           AC_DEFINE(HAVE_LOG10L)
 134           AC_DEFINE(HAVE_LOGL)
 135           AC_DEFINE(HAVE_MODFL)
 136           AC_DEFINE(HAVE_POWL)
 137           AC_DEFINE(HAVE_SINCOSL)
 138           AC_DEFINE(HAVE_SINL)
 139           AC_DEFINE(HAVE_SINHL)
 140           AC_DEFINE(HAVE_SQRTL)
 141           AC_DEFINE(HAVE_TANL)
 142           AC_DEFINE(HAVE_TANHL)
 143         fi
 144         GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 145         GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
 146         GLIBCPP_CHECK_WCHAR_T_SUPPORT
 147         os_include_dir="config/os/gnu-linux"
 148         # GLIBCPP_CHECK_STDLIB_SUPPORT
 149         AC_DEFINE(HAVE_STRTOF)
 150         AC_DEFINE(HAVE_STRTOLD)
 151         # AC_FUNC_MMAP
 152         AC_DEFINE(HAVE_MMAP)
 153         ;;
 154     *)
 155         # We assume newlib.  This lets us hard-code the functions we know
 156         # we'll have.
 157         AC_DEFINE(HAVE_FINITE)
 158         AC_DEFINE(HAVE_ISNAN)
 159         AC_DEFINE(HAVE_ISNANF)
 160         AC_DEFINE(HAVE_ISINF)
 161         AC_DEFINE(HAVE_ISINFF)
 162
 163         os_include_dir="config/os/newlib"
 164
 165         AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
 166         AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
 167         # need to check for faster f versions of math functions, ie sinf?
 168         ;;
 169   esac
 170 else
 171
 172   # We are being configured natively. We can do more elaborate tests
 173   # that include AC_TRY_COMPILE now, as the linker is assumed to be
 174   # working.
 175   xcompiling=0
 176   NATIVE=yes
 177   CANADIAN=no
 178   NULL_TARGET=no
 179
 180   # Check for available headers.
 181   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 182   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h])
 183
 184   GLIBCPP_CHECK_COMPILER_FEATURES
 185   GLIBCPP_CHECK_LINKER_FEATURES
 186   GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 187   GLIBCPP_CHECK_MATH_SUPPORT
 188   GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 189   GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
 190   GLIBCPP_CHECK_WCHAR_T_SUPPORT
 191   GLIBCPP_CHECK_STDLIB_SUPPORT
 192
 193   AC_FUNC_MMAP
 194 fi
 195
 196 # Now that ctype is determined for all possible targets, we can do this...
 197 AC_LINK_FILES($os_include_dir/bits/ctype_base.h, \
 198 include/bits/ctype_base.h)
 199 AC_LINK_FILES($os_include_dir/bits/ctype_inline.h, \
 200 include/bits/ctype_inline.h)
 201 AC_LINK_FILES($os_include_dir/bits/ctype_noninline.h, \
 202 include/bits/ctype_noninline.h)
 203 AC_LINK_FILES($ATOMICITYH/bits/atomicity.h, include/bits/atomicity.h)
 204
 205 AM_CONDITIONAL(NULL_TARGET, test "$NULL_TARGET" = yes)
 206 AM_CONDITIONAL(NATIVE, test "$NATIVE" = yes || test "$NULL_TARGET" = yes)
 207 AM_CONDITIONAL(USE_LIBDIR, test -z "$with_cross_host")
 208 AM_CONDITIONAL(CANADIAN, test "$CANADIAN" = yes)
 209
 210 AC_CACHE_SAVE
 211 AC_LC_MESSAGES
 212
 213 if test "${multilib}" = "yes"; then
 214   multilib_arg="--enable-multilib"
 215 else
 216   multilib_arg=
 217 fi
 218
 219
 220 # Generate the various Makefiles, include files, and scripts.
 221
 222 # This helps subvert libstdcxx_interface, as calculated by devo/config.if
 223 # Needed so that g++ can find the correct include subdir automatically.
 224 INTERFACE=v3
 225
 226 # Check for the interface version number for specifying where header
 227 # files are installed, if a version number is provided.
 228 AC_MSG_CHECKING([for interface version number])
 229 libstdcxx_interface=$INTERFACE
 230 AC_MSG_RESULT($libstdcxx_interface)
 231 AC_SUBST(libstdcxx_interface)
 232
 233 # Process the option --with-gxx-include-dir=<path to include-files directory>
 234 AC_MSG_CHECKING([for --with-gxx-include-dir])
 235 AC_ARG_WITH(gxx-include-dir,
 236 [ --with-gxx-include-dir  the installation directory for include files],
 237 [case "${withval}" in
 238   yes)
 239     AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
 240     gxx_include_dir=no
 241     ;;
 242   no)
 243     gxx_include_dir=no
 244     ;;
 245   *)
 246     gxx_include_dir=${withval}
 247     ;;
 248 esac], [gxx_include_dir=no])
 249 AC_MSG_RESULT($gxx_include_dir)
 250 AC_SUBST(gxx_include_dir)
 251 AM_CONDITIONAL(GXX_INCLUDE_DIR, test x${gxx_include_dir} != xno)
 252
 253 # Process the option "--enable-version-specific-runtime-libs"
 254 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
 255 AC_ARG_ENABLE(version-specific-runtime-libs,
 256 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
 257 [  version_specific_libs=yes
 258 # Need the gcc compiler version to know where to install libraries
 259 # and header files if --enable-version-specific-runtime-libs option
 260 # is selected.
 261 changequote(,)dnl
 262 gcc_tmp=`grep version_string ${srcdir}/../gcc/version.c | awk '{print $6}'`
 263 gcc_num=`echo ${gcc_tmp} | sed 's/\"//g'`
 264 #gcc_date=`grep version_string ${srcdir}/../gcc/version.c | awk '{print $7}'`
 265 #gcc_version=$gcc_num-$gcc_date
 266 gcc_version=$gcc_num
 267 changequote([,])dnl
 268 AC_SUBST(gcc_version)
 269 ],version_specific_libs=no)
 270 AC_MSG_RESULT($version_specific_libs)
 271 if test x${version_specific_libs} = xyes; then
 272   AM_CONDITIONAL(VERSION_SPECIFIC_LIBS, test x${version_specific_libs} = xyes)
 273   AC_MSG_WARN(version specific directory is: $gcc_version)
 274 fi
 275
 276 # We have to install all the generated or linked includes files
 277 # specified as build_headers in src/Makefile.am in a target-dependent
 278 # place, or else multiple installs for different compilers will
 279 # overwrite these files.
 280 # NB: Keep this and gcc/Makefile.in's -DGPLUSPLUS_TOOL_INCLUDE_DIR in sync.
 281 gxx_target_include_dir='$(exec_prefix)/$(target_alias)/include/g++-$(libstdcxx_interface)'
 282 AC_SUBST(gxx_target_include_dir)
 283
 284
 285 # Export all the include and flag information to makefiles.
 286 GLIBCPP_EXPORT_INCLUDES
 287 GLIBCPP_EXPORT_FLAGS
 288
 289 # This should be done by mkincludedir, but hack around it now.
 290 blddir=`pwd`
 291 echo "checking for $blddir/include"
 292
 293 if test ! -d "$blddir/include"; then
 294   mkdir "$blddir/include"
 295 fi
 296
 297 # NB: Multilibs need MULTISUBDIR defined correctly in src/Makefile.am
 298 # and libsupc++/Makefile.am so that multilib installs will end up
 299 # installed in the correct place. To work around this not being passed
 300 # down from config-ml.in -> top_srcdir/Makefile.am ->
 301 # top_srcdir/{src,libsupc++}/Makefile.am, manually append it here.
 302 AC_OUTPUT(tests_flags mkcheck Makefile src/Makefile libmath/Makefile libio/Makefile libsupc++/Makefile,
 303 [if test -n "$CONFIG_FILES"; then
 304   ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 305   grep '^MULTISUBDIR =' Makefile >> src/Makefile
 306   grep '^MULTISUBDIR =' Makefile >> libsupc++/Makefile
 307 fi
 308 chmod +x tests_flags
 309 chmod +x mkcheck
 310 ],
 311 srcdir=${srcdir}
 312 host=${host}
 313 target=${target}
 314 with_multisubdir=${with_multisubdir}
 315 ac_configure_args="${multilib_arg} ${ac_configure_args}"
 316 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 317 glibcpp_basedir=${glibcpp_basedir}
 318 CC="${CC}"
 319 CXX="${CXX}"
 320 )
 321
 322
 323 # Generate bits/c++config.h
 324 # NB: This must be the first generated file as others include it. . .
 325 $srcdir/mkc++config $blddir $srcdir
 326
 327 # Generate bits/std_limits.h and src/limitsMEMBERS.cc
 328 if test ! -f stamp-limits; then
 329   $srcdir/mknumeric_limits $blddir $srcdir $xcompiling
 330   if test ! -f include/bits/std_limits.h; then
 331     echo "mknumeric_limits failed to execute properly: exiting"
 332     exit 1
 333   else
 334     touch stamp-limits
 335   fi
 336 fi
 337
 338
 339 # Sanity checking & User-visible messages.
 340 # Checks down here, otherwise they get scrolled off before
 341 # the user will notice.
 342
 343 # Trying to get more people to read documentation.  Possibly remove
 344 # check and warn all the time. There is no "informational" AC_MSG_
 345 # macro, so these are going to be printed even when --quiet/--silent
 346 # is given.
 347 if test ! -f stamp-sanity-warned; then
 348   touch stamp-sanity-warned
 349   echo ""
 350   echo "Please make certain that you read the installation information here:"
 351   echo "  faster => ${srcdir}/docs/install.html"
 352   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/install.html>"
 353   echo ""
 354   echo "and the configuration information here:"
 355   echo "  faster => ${srcdir}/docs/configopts.html"
 356   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html>"
 357   echo ""
 358   echo "before proceeding with ${_cv_gnu_make_command}."
 359   echo ""
 360 fi