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/complex.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_C_MBCHAR([yes])
  39 GLIBCPP_ENABLE_LONG_LONG([yes])
  40 GLIBCPP_ENABLE_SHADOW([no])
  41 GLIBCPP_ENABLE_THREADS
  42 GLIBCPP_ENABLE_ATOMICITY
  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         # GLIBCPP_CHECK_CTYPE_SUPPORT
 148         ctype_include_dir="config/os/gnu-linux"
 149         # GLIBCPP_CHECK_STDLIB_SUPPORT
 150         AC_DEFINE(HAVE_STRTOF)
 151         AC_DEFINE(HAVE_STRTOLD)
 152         # AC_FUNC_MMAP
 153         AC_DEFINE(HAVE_MMAP)
 154         ;;
 155     *)
 156         # We assume newlib.  This lets us hard-code the functions we know
 157         # we'll have.
 158         AC_DEFINE(HAVE_FINITE)
 159         AC_DEFINE(HAVE_ISNAN)
 160         AC_DEFINE(HAVE_ISNANF)
 161         AC_DEFINE(HAVE_ISINF)
 162         AC_DEFINE(HAVE_ISINFF)
 163
 164         ctype_include_dir="config/os/newlib"
 165         os_include_dir="config/os/newlib"
 166
 167         AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
 168         AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
 169         # need to check for faster f versions of math functions, ie sinf?
 170         ;;
 171   esac
 172 else
 173
 174   # We are being configured natively. We can do more elaborate tests
 175   # that include AC_TRY_COMPILE now, as the linker is assumed to be
 176   # working.
 177   xcompiling=0
 178   NATIVE=yes
 179   CANADIAN=no
 180   NULL_TARGET=no
 181
 182   # Check for available headers.
 183   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 184   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h])
 185
 186   GLIBCPP_CHECK_COMPILER_FEATURES
 187   GLIBCPP_CHECK_LINKER_FEATURES
 188   GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 189   GLIBCPP_CHECK_MATH_SUPPORT
 190   GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 191   GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
 192   GLIBCPP_CHECK_WCHAR_T_SUPPORT
 193   GLIBCPP_CHECK_CTYPE_SUPPORT
 194   GLIBCPP_CHECK_STDLIB_SUPPORT
 195
 196   AC_FUNC_MMAP
 197 fi
 198
 199 # Now that ctype is determined for all possible targets, we can do this...
 200 AC_LINK_FILES($ctype_include_dir/bits/ctype_base.h, \
 201 include/bits/ctype_base.h)
 202 AC_LINK_FILES($ctype_include_dir/bits/ctype_inline.h, \
 203 include/bits/ctype_inline.h)
 204 AC_LINK_FILES($ctype_include_dir/bits/ctype_noninline.h, \
 205 include/bits/ctype_noninline.h)
 206
 207 AM_CONDITIONAL(NULL_TARGET, test "$NULL_TARGET" = yes)
 208 AM_CONDITIONAL(NATIVE, test "$NATIVE" = yes || test "$NULL_TARGET" = yes)
 209 AM_CONDITIONAL(USE_LIBDIR, test -z "$with_cross_host")
 210 AM_CONDITIONAL(CANADIAN, test "$CANADIAN" = yes)
 211
 212 AC_CACHE_SAVE
 213 AC_LC_MESSAGES
 214
 215 if test "${multilib}" = "yes"; then
 216   multilib_arg="--enable-multilib"
 217 else
 218   multilib_arg=
 219 fi
 220
 221
 222 # Generate the various Makefiles, include files, and scripts.
 223
 224 # This helps subvert libstdcxx_interface, as calculated by devo/config.if
 225 # Needed so that g++ can find the correct include subdir automatically.
 226 INTERFACE=v3
 227
 228 # Check for the interface version number for specifying where header
 229 # files are installed, if a version number is provided.
 230 AC_MSG_CHECKING([for interface version number])
 231 libstdcxx_interface=$INTERFACE
 232 AC_MSG_RESULT($libstdcxx_interface)
 233 AC_SUBST(libstdcxx_interface)
 234
 235 # Process the option --with-gxx-include-dir=<path to include-files directory>
 236 AC_MSG_CHECKING([for --with-gxx-include-dir])
 237 AC_ARG_WITH(gxx-include-dir,
 238 [ --with-gxx-include-dir  the installation directory for include files],
 239 [case "${withval}" in
 240   yes)
 241     AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
 242     gxx_include_dir=no
 243     ;;
 244   no)
 245     gxx_include_dir=no
 246     ;;
 247   *)
 248     gxx_include_dir=${withval}
 249     ;;
 250 esac], [gxx_include_dir=no])
 251 AC_MSG_RESULT($gxx_include_dir)
 252 AC_SUBST(gxx_include_dir)
 253 AM_CONDITIONAL(GXX_INCLUDE_DIR, test x${gxx_include_dir} != xno)
 254
 255 # Process the option "--enable-version-specific-runtime-libs"
 256 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
 257 AC_ARG_ENABLE(version-specific-runtime-libs,
 258 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
 259 [  version_specific_libs=yes
 260 # Need the gcc compiler version to know where to install libraries
 261 # and header files if --enable-version-specific-runtime-libs option
 262 # is selected.
 263 changequote(,)dnl
 264 gcc_tmp=`grep version_string ${srcdir}/../gcc/version.c | awk '{print $6}'`
 265 gcc_num=`echo ${gcc_tmp} | sed 's/\"//g'`
 266 #gcc_date=`grep version_string ${srcdir}/../gcc/version.c | awk '{print $7}'`
 267 #gcc_version=$gcc_num-$gcc_date
 268 gcc_version=$gcc_num
 269 changequote([,])dnl
 270 AC_SUBST(gcc_version)
 271 ],version_specific_libs=no)
 272 AC_MSG_RESULT($version_specific_libs)
 273 if test x${version_specific_libs} = xyes; then
 274   AM_CONDITIONAL(VERSION_SPECIFIC_LIBS, test x${version_specific_libs} = xyes)
 275   AC_MSG_WARN(version specific directory is: $gcc_version)
 276 fi
 277
 278 # We have to install all the generated or linked includes files
 279 # specified as build_headers in src/Makefile.am in a target-dependent
 280 # place, or else multiple installs for different compilers will
 281 # overwrite these files.
 282 gxx_target_include_dir='$(exec_prefix)/$(target_alias)/include/g++-$(libstdcxx_interface)'
 283 AC_SUBST(gxx_target_include_dir)
 284
 285
 286 # Export all the include and flag information to makefiles.
 287 GLIBCPP_EXPORT_INCLUDES
 288 GLIBCPP_EXPORT_FLAGS
 289
 290 # This should be done by mkincludedir, but hack around it now.
 291 blddir=`pwd`
 292 echo "checking for $blddir/include"
 293
 294 if test ! -d "$blddir/include"; then
 295   mkdir "$blddir/include"
 296 fi
 297
 298 # NB: Multilibs need MULTISUBDIR defined correctly in src/Makefile.am
 299 # so that multilib installs will end up installed in the correct
 300 # place. To work around this not being passed down from config-ml.in
 301 # -> top_srcdir/Makefile.am -> top_srcdir/src/Makefile.am, manually
 302 # append it here.
 303 AC_OUTPUT(tests_flags mkcheck Makefile src/Makefile libmath/Makefile libio/Makefile libsupc++/Makefile,
 304 [if test -n "$CONFIG_FILES"; then
 305   ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 306   grep '^MULTISUBDIR =' Makefile >> src/Makefile
 307 fi
 308 chmod +x tests_flags
 309 chmod +x mkcheck
 310 ],
 311 srcdir=${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://sources.redhat.com/libstdc++/install.html>"
 353   echo ""
 354   echo "and the configuration information here:"
 355   echo "  faster => ${srcdir}/docs/configopts.html"
 356   echo "  slower => <URL:http://sources.redhat.com/libstdc++/configopts.html>"
 357   echo ""
 358   echo "before proceeding with ${_cv_gnu_make_command}."
 359   echo ""
 360 fi