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 GLIBCPP_CONFIGURE(.)
  19 AC_LIBTOOL_DLOPEN
  20 AM_PROG_LIBTOOL
  21 GLIBCPP_CHECK_GNU_MAKE
  22   if test "x$_cv_gnu_make_command" = "x"; then
  23     AC_MSG_ERROR([GNU make not found. Please install it or correct your path.])
  24   fi
  25 AM_CONFIG_HEADER(config.h)
  26
  27 # Check for c++ or library specific bits that don't require linking.
  28 GLIBCPP_CHECK_COMPILER_VERSION
  29 GLIBCPP_CHECK_CPU
  30
  31 AC_CACHE_SAVE
  32
  33 # Enable all the crazy c++ stuff.
  34 GLIBCPP_ENABLE_DEBUG
  35 GLIBCPP_ENABLE_CSTDIO
  36 GLIBCPP_ENABLE_LONG_LONG(yes)
  37 GLIBCPP_ENABLE_SHADOW(no)
  38 GLIBCPP_ENABLE_THREADS
  39 #GLIBCPP_ENABLE_RELIBGCC([../..])
  40 GLIBCPP_ENABLE_CXX_FLAGS([none])
  41
  42
  43 if test -n "$with_cross_host"; then
  44
  45   # We are being configured with a cross compiler.  AC_REPLACE_FUNCS
  46   # may not work correctly, because the compiler may not be able to
  47   # link executables.
  48
  49   xcompiling=1
  50   NATIVE=no
  51   # If Canadian cross, then don't pick up tools from the build
  52   # directory.
  53   if test "$build" != "$with_cross_host"; then
  54     CANADIAN=yes
  55     NULL_TARGET=yes
  56   else
  57     CANADIAN=no
  58     NULL_TARGET=no
  59   fi
  60
  61   case "$target_alias" in
  62     *-wince-*)
  63         # Configure for Microsoft Windows CE, or whatever they are
  64         # currently calling it.
  65         AC_DEFINE(HAVE_FLOAT_H)
  66
  67         AC_DEFINE(HAVE__FINITE)
  68         AC_DEFINE(HAVE__ISNAN)
  69         AC_DEFINE(HAVE__COPYSIGN)
  70         AC_DEFINE(HAVE__FPCLASS)
  71         AC_DEFINE(HAVE_MODF)
  72
  73         ctype_include_dir="config/wince"
  74         AC_SUBST(ctype_include_dir)
  75
  76         AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
  77
  78         AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
  79         AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
  80         ;;
  81     *)
  82         # We assume newlib.  This lets us hard-code the functions we know
  83         # we'll have.
  84         AC_DEFINE(HAVE_FINITE)
  85         AC_DEFINE(HAVE_ISNAN)
  86         AC_DEFINE(HAVE_ISNANF)
  87         AC_DEFINE(HAVE_ISINF)
  88         AC_DEFINE(HAVE_ISINFF)
  89
  90         ctype_include_dir="config/newlib"
  91         AC_SUBST(ctype_include_dir)
  92
  93         AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
  94
  95         AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
  96         AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
  97         # need to ceck for faster f versions of math functions, ie sinf?
  98         ;;
  99   esac
 100 else
 101
 102   # We are being configured natively. We can do more elaborate tests
 103   # that include AC_TRY_COMPILE now, as the linker is assumed to be
 104   # working.
 105
 106   xcompiling=0
 107   NATIVE=yes
 108   CANADIAN=no
 109   NULL_TARGET=no
 110
 111   # Check for available headers.
 112   AC_CHECK_HEADERS([nan.h ieeefp.h endian.h sys/isa_defs.h machine/endian.h \
 113   machine/param.h sys/machine.h fp.h locale.h float.h inttypes.h])
 114
 115   GLIBCPP_CHECK_COMPILER_FEATURES
 116   GLIBCPP_CHECK_LINKER_FEATURES
 117   GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
 118   GLIBCPP_CHECK_MATH_SUPPORT
 119   GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
 120   GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
 121   AC_CACHE_SAVE
 122   GLIBCPP_CHECK_WCHAR_T_SUPPORT
 123   GLIBCPP_CHECK_CTYPE
 124
 125   AC_FUNC_MMAP
 126 fi
 127
 128 AM_CONDITIONAL(CANADIAN, test "$CANADIAN" = yes)
 129 AM_CONDITIONAL(NULL_TARGET, test "$NULL_TARGET" = yes)
 130 AM_CONDITIONAL(NATIVE, test "$NATIVE" = yes || test "$NULL_TARGET" = yes)
 131 AM_CONDITIONAL(USE_LIBDIR, test -z "$with_cross_host")
 132
 133 AC_LC_MESSAGES
 134
 135
 136 if test "${multilib}" = "yes"; then
 137   multilib_arg="--enable-multilib"
 138 else
 139   multilib_arg=
 140 fi
 141
 142
 143 # Generate the various Makefiles, include files, and scripts.
 144
 145 # NB: Multilibs need MULTISUBDIR defined correctly in src/Makefile.am
 146 # so that multilib installs will end up installed in the correct
 147 # place. To work around this not being passed down from config-ml.in
 148 # -> top_srcdir/Makefile.am -> top_srcdir/src/Makefile.am, manually
 149 # append it here.
 150
 151 AC_OUTPUT(mkcheck Makefile src/Makefile math/Makefile libio/Makefile,
 152 [if test -n "$CONFIG_FILES"; then
 153   ac_file=Makefile . ${glibcpp_basedir}/../config-ml.in
 154   grep '^MULTISUBDIR =' Makefile >> src/Makefile
 155 fi],
 156 srcdir=${srcdir}
 157 host=${host}
 158 target=${target}
 159 with_multisubdir=${with_multisubdir}
 160 ac_configure_args="${multilib_arg} ${ac_configure_args}"
 161 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 162 glibcpp_basedir=${glibcpp_basedir}
 163 CC="${CC}"
 164 CXX="${CXX}"
 165 )
 166
 167
 168 blddir=`pwd`
 169 # Generate bits/c++config.h
 170 # NB: This must be the first generated file as others include it. . .
 171 AC_OUTPUT_COMMANDS([$srcdir/mkc++config $blddir $srcdir])
 172
 173 # Generate bits/std_limits.h and src/limitsMEMBERS.cc
 174 AC_OUTPUT_COMMANDS([$srcdir/mknumeric_limits $blddir $srcdir $xcompiling])
 175
 176
 177 # Sanity checking & User-visible messages.
 178 # Checks down here, otherwise they get scrolled off before
 179 # the user will notice.
 180 if test "$enable_namespaces" = "yes" && test "$enable_libgcc_rebuild" = "no"
 181 then
 182   AC_MSG_WARN([libgcc.a will not match mangled symbols unless it is rebuilt])
 183 fi
 184 if test "$enable_namespaces" = "no" && test "$enable_libgcc_rebuild" != "no"
 185 then
 186   # Other things besides namespaces can make this true as well, but none
 187   # of them are done automatically... yet
 188   AC_MSG_WARN([no point in rebuilding libgcc.a if namespaces aren't used])
 189 fi
 190
 191 # Trying to get more people to read documentation.  Possibly remove
 192 # check and warn all the time. There is no "informational" AC_MSG_
 193 # macro, so these are going to be printed even when --quiet/--silent
 194 # is given.
 195 if test ! -f stamp-sanity-warned; then
 196   touch stamp-sanity-warned
 197   echo ""
 198   echo "Please make certain that you read the installation information here:"
 199   echo "  faster => ${srcdir}/docs/install.html"
 200   echo "  slower => <URL:http://sources.redhat.com/libstdc++/install.html>"
 201   echo ""
 202   echo "and the configuration information here:"
 203   echo "  faster => ${srcdir}/docs/configopts.html"
 204   echo "  slower => <URL:http://sources.redhat.com/libstdc++/configopts.html>"
 205   echo ""
 206   echo "before proceeding with ${_cv_gnu_make_command}."
 207   echo ""
 208 fi
 209
 210