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     toprel=".."
  15   else
  16     if test "${with_target_subdir}" != "."; then
  17       toprel="${with_multisrctop}../.."
  18     else
  19       toprel="${with_multisrctop}.."
  20     fi
  21   fi
  22 else
  23   toprel=".."
  24 fi
  25 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
  26 toplevel_srcdir=\${top_srcdir}/$toprel
  27 AC_SUBST(toplevel_srcdir)
  28
  29 dnl This is here just to satisfy automake.
  30 ifelse(not,equal,[AC_CONFIG_AUX_DIR(..)])
  31
  32 # Gets and sets build, host, target, *_vendor, *_cpu, *_os, etc.
  33 # AC 2.50 sets target_alias iff the user specified --target, but we use it
  34 # everywhere, so we set it here just to be sure.
  35 AC_CANONICAL_SYSTEM
  36 target_alias=${target_alias-$target}
  37 AC_SUBST(target_alias)
  38
  39 # Will set LN_S to either 'ln -s' or 'ln'.  With autoconf 2.50+, can also
  40 # be 'cp -p' if linking isn't available.
  41 #ac_cv_prog_LN_S='cp -p'
  42 AC_PROG_LN_S
  43
  44 # We use these options to decide which functions to include.
  45 AC_ARG_WITH(target-subdir,
  46 [  --with-target-subdir=SUBDIR
  47                            configuring in a subdirectory])
  48 AC_ARG_WITH(cross-host,
  49 [  --with-cross-host=HOST  configuring with a cross compiler])
  50
  51 # Runs configure.host and configure.target. Have to run this before
  52 # the GLIBCPP_ENABLE_* macros below.
  53 GLIBCPP_CONFIGURE(.)
  54
  55 AC_LIBTOOL_DLOPEN
  56 AM_PROG_LIBTOOL
  57 AC_SUBST(enable_shared)
  58 AC_SUBST(enable_static)
  59 GLIBCPP_CHECK_GNU_MAKE
  60
  61 AM_CONFIG_HEADER(config.h)
  62
  63 # Check for c++ or library specific bits that don't require linking.
  64 GLIBCPP_CHECK_COMPILER_VERSION
  65
  66 # Enable all the crazy c++ stuff.  C_MBCHAR must come early.
  67 GLIBCPP_ENABLE_DEBUG($USE_MAINTAINER_MODE)
  68 GLIBCPP_ENABLE_CSTDIO
  69 GLIBCPP_ENABLE_CLOCALE
  70 GLIBCPP_ENABLE_C_MBCHAR([yes])
  71 GLIBCPP_ENABLE_C99([yes])
  72 GLIBCPP_ENABLE_LONG_LONG([yes])
  73 GLIBCPP_ENABLE_CHEADERS([c_std])
  74 GLIBCPP_ENABLE_THREADS
  75 GLIBCPP_ENABLE_CXX_FLAGS([none])
  76 GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
  77
  78 if test -n "$with_cross_host" || test x"$build" != x"$host"; then
  79
  80   # We are being configured with some form of cross compiler.
  81   # mknumeric_limits may not work correctly, either because the
  82   # compiler may not run on this machine, may not be able to link
  83   # executables, or may produce executables we can't run on this
  84   # machine.
  85   GLIBCPP_IS_CROSS_COMPILING=1
  86
  87   # If Canadian cross, then don't pick up tools from the build
  88   # directory.
  89   if test -n "$with_cross_host" && test x"$build" != x"$with_cross_host"; then
  90     CANADIAN=yes
  91   else
  92     CANADIAN=no
  93   fi
  94
  95   case "$target_alias" in
  96     *-linux*)
  97         # Construct linux crosses by hand, eliminating bits that need ld...
  98         # Check for available headers.
  99         AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h \
 100         machine/endian.h machine/param.h sys/machine.h fp.h locale.h \
 101         float.h inttypes.h])
 102
 103         # GLIBCPP_CHECK_COMPILER_FEATURES
 104         SECTION_FLAGS='-ffunction-sections -fdata-sections'
 105         AC_SUBST(SECTION_FLAGS)
 106         GLIBCPP_CHECK_LINKER_FEATURES
 107         # GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 108         # GLIBCPP_CHECK_MATH_SUPPORT
 109         AC_DEFINE(HAVE_ACOSF)
 110         AC_DEFINE(HAVE_ASINF)
 111         AC_DEFINE(HAVE_ATAN2F)
 112         AC_DEFINE(HAVE_ATANF)
 113         AC_DEFINE(HAVE_CEILF)
 114         AC_DEFINE(HAVE_COPYSIGN)
 115         AC_DEFINE(HAVE_COPYSIGNF)
 116         AC_DEFINE(HAVE_COSF)
 117         AC_DEFINE(HAVE_COSHF)
 118         AC_DEFINE(HAVE_EXPF)
 119         AC_DEFINE(HAVE_FABSF)
 120         AC_DEFINE(HAVE_FINITE)
 121         AC_DEFINE(HAVE_FINITEF)
 122         AC_DEFINE(HAVE_FLOORF)
 123         AC_DEFINE(HAVE_FMODF)
 124         AC_DEFINE(HAVE_FREXPF)
 125         AC_DEFINE(HAVE_ISINF)
 126         AC_DEFINE(HAVE_ISINFF)
 127         AC_DEFINE(HAVE_ISNAN)
 128         AC_DEFINE(HAVE_ISNANF)
 129         AC_DEFINE(HAVE_LDEXPF)
 130         AC_DEFINE(HAVE_LOG10F)
 131         AC_DEFINE(HAVE_LOGF)
 132         AC_DEFINE(HAVE_MODFF)
 133         AC_DEFINE(HAVE_POWF)
 134         AC_DEFINE(HAVE_SINCOS)
 135         AC_DEFINE(HAVE_SINCOSF)
 136         AC_DEFINE(HAVE_SINF)
 137         AC_DEFINE(HAVE_SINHF)
 138         AC_DEFINE(HAVE_SQRTF)
 139         AC_DEFINE(HAVE_TANF)
 140         AC_DEFINE(HAVE_TANHF)
 141
 142         # At some point, we should differentiate between architectures
 143         # like x86, which have long double versions, and alpha/powerpc/etc.,
 144         # which don't. For the time being, punt.
 145         if test x"long_double_math_on_this_cpu" = x"yes"; then
 146           AC_DEFINE(HAVE_ACOSL)
 147           AC_DEFINE(HAVE_ASINL)
 148           AC_DEFINE(HAVE_ATAN2L)
 149           AC_DEFINE(HAVE_ATANL)
 150           AC_DEFINE(HAVE_CEILL)
 151           AC_DEFINE(HAVE_COPYSIGNL)
 152           AC_DEFINE(HAVE_COSL)
 153           AC_DEFINE(HAVE_COSHL)
 154           AC_DEFINE(HAVE_EXPL)
 155           AC_DEFINE(HAVE_FABSL)
 156           AC_DEFINE(HAVE_FINITEL)
 157           AC_DEFINE(HAVE_FLOORL)
 158           AC_DEFINE(HAVE_FMODL)
 159           AC_DEFINE(HAVE_FREXPL)
 160           AC_DEFINE(HAVE_ISINFL)
 161           AC_DEFINE(HAVE_ISNANL)
 162           AC_DEFINE(HAVE_LDEXPL)
 163           AC_DEFINE(HAVE_LOG10L)
 164           AC_DEFINE(HAVE_LOGL)
 165           AC_DEFINE(HAVE_MODFL)
 166           AC_DEFINE(HAVE_POWL)
 167           AC_DEFINE(HAVE_SINCOSL)
 168           AC_DEFINE(HAVE_SINL)
 169           AC_DEFINE(HAVE_SINHL)
 170           AC_DEFINE(HAVE_SQRTL)
 171           AC_DEFINE(HAVE_TANL)
 172           AC_DEFINE(HAVE_TANHL)
 173         fi
 174         GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 175         GLIBCPP_CHECK_WCHAR_T_SUPPORT
 176         os_include_dir="config/os/gnu-linux"
 177         # GLIBCPP_CHECK_STDLIB_SUPPORT
 178         AC_DEFINE(HAVE_STRTOF)
 179         AC_DEFINE(HAVE_STRTOLD)
 180         # AC_FUNC_MMAP
 181         AC_DEFINE(HAVE_MMAP)
 182         ;;
 183     *)
 184         # We assume newlib.  This lets us hard-code the functions we know
 185         # we'll have.
 186         AC_DEFINE(HAVE_FINITE)
 187         AC_DEFINE(HAVE_ISNAN)
 188         AC_DEFINE(HAVE_ISNANF)
 189         AC_DEFINE(HAVE_ISINF)
 190         AC_DEFINE(HAVE_ISINFF)
 191
 192         os_include_dir="config/os/newlib"
 193
 194         # need to check for faster f versions of math functions, ie sinf?
 195         ;;
 196   esac
 197 else
 198
 199   # We are being configured natively. We can do more elaborate tests
 200   # that include AC_TRY_COMPILE now, as the linker is assumed to be
 201   # working.
 202   GLIBCPP_IS_CROSS_COMPILING=0
 203   CANADIAN=no
 204
 205   # Check for available headers.
 206   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 207   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h gconv.h])
 208
 209   GLIBCPP_CHECK_COMPILER_FEATURES
 210   GLIBCPP_CHECK_LINKER_FEATURES
 211   GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 212   GLIBCPP_CHECK_MATH_SUPPORT
 213   GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 214   GLIBCPP_CHECK_WCHAR_T_SUPPORT
 215   GLIBCPP_CHECK_STDLIB_SUPPORT
 216
 217   AC_TRY_COMPILE([
 218 #include <setjmp.h>
 219 ], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1);],
 220 [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available.  ])])
 221
 222   AC_FUNC_MMAP
 223 fi
 224
 225 # Propagate the target-specific source directories through the build chain.
 226 OS_INC_SRCDIR=$os_include_dir/bits
 227 ATOMICITY_INC_SRCDIR=$ATOMICITYH/bits
 228 AC_SUBST(OS_INC_SRCDIR)
 229 AC_SUBST(ATOMICITY_INC_SRCDIR)
 230
 231 # Set up cross-compile flags
 232 AC_SUBST(GLIBCPP_IS_CROSS_COMPILING)
 233 AM_CONDITIONAL(CANADIAN, test "$CANADIAN" = yes)
 234
 235 AC_CACHE_SAVE
 236 AC_LC_MESSAGES
 237
 238 if test "${multilib}" = "yes"; then
 239   multilib_arg="--enable-multilib"
 240 else
 241   multilib_arg=
 242 fi
 243
 244 # Needed so that g++ can find the correct include subdir automatically.
 245 INTERFACE=v3
 246
 247 # Export all the install information
 248 GLIBCPP_EXPORT_INSTALL_INFO
 249
 250 # Export all the include and flag information to makefiles.
 251 GLIBCPP_EXPORT_INCLUDES
 252 GLIBCPP_EXPORT_FLAGS
 253
 254 if ${CONFIG_SHELL-/bin/sh} ./libtool --tag CXX --features |
 255    grep "enable shared" > /dev/null; then
 256   LIBSUPCXX_PICFLAGS=-prefer-pic
 257 else
 258   LIBSUPCXX_PICFLAGS=
 259 fi
 260 AC_SUBST(LIBSUPCXX_PICFLAGS)
 261
 262 # Generate the various Makefiles, include files, and scripts.
 263 # NB: Multilibs need MULTISUBDIR defined correctly in src/Makefile.am
 264 # and libsupc++/Makefile.am so that multilib installs will end up
 265 # installed in the correct place. To work around this not being passed
 266 # down from config-ml.in -> top_srcdir/Makefile.am ->
 267 # top_srcdir/{src,libsupc++}/Makefile.am, manually append it here.
 268 AC_OUTPUT(Makefile \
 269     include/Makefile src/Makefile \
 270     libmath/Makefile libio/Makefile libsupc++/Makefile \
 271     testsuite/Makefile mkcheck testsuite_flags,
 272 [if test -n "$CONFIG_FILES"; then
 273   ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 274   grep '^MULTISUBDIR =' Makefile >> src/Makefile
 275   grep '^MULTISUBDIR =' Makefile >> libsupc++/Makefile
 276 fi
 277 chmod +x mkcheck
 278 chmod +x testsuite_flags
 279 ],
 280 srcdir=${srcdir}
 281 host=${host}
 282 target=${target}
 283 with_multisubdir=${with_multisubdir}
 284 ac_configure_args="${multilib_arg} ${ac_configure_args}"
 285 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 286 glibcpp_basedir=${glibcpp_basedir}
 287 CC="${CC}"
 288 CXX="${CXX}"
 289 )
 290
 291
 292 # Sanity checking & User-visible messages.
 293 # Checks down here, otherwise they get scrolled off before
 294 # the user will notice.
 295
 296 # Trying to get more people to read documentation.  Possibly remove
 297 # check and warn all the time. There is no "informational" AC_MSG_
 298 # macro, so these are going to be printed even when --quiet/--silent
 299 # is given.
 300 if test ! -f stamp-sanity-warned; then
 301   touch stamp-sanity-warned
 302   echo ""
 303   echo "Please make certain that you read the installation information here:"
 304   echo "  faster => ${srcdir}/docs/install.html"
 305   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/install.html>"
 306   echo ""
 307   echo "and the configuration information here:"
 308   echo "  faster => ${srcdir}/docs/configopts.html"
 309   echo "  slower => <URL:http://gcc.gnu.org/onlinedocs/libstdc++/configopts.html>"
 310   echo ""
 311   echo "before proceeding with ${_cv_gnu_make_command}."
 312   echo ""
 313 fi