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