libgcc/configure.ac

   1 dnl Process this file with autoconf to produce a configure script.
   2
   3 sinclude(../config/enable.m4)
   4 sinclude(../config/tls.m4)
   5 sinclude(../config/acx.m4)
   6 sinclude(../config/no-executables.m4)
   7 sinclude(../config/override.m4)
   8
   9 AC_PREREQ(2.64)
  10 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
  11 AC_CONFIG_SRCDIR([static-object.mk])
  12
  13 AC_ARG_WITH(target-subdir,
  14 [  --with-target-subdir=SUBDIR      Configuring in a subdirectory for target])
  15 AC_ARG_WITH(cross-host,
  16 [  --with-cross-host=HOST           Configuring with a cross compiler])
  17 AC_ARG_WITH(ld,
  18 [  --with-ld               arrange to use the specified ld (full pathname)])
  19
  20 if test "${srcdir}" = "."; then
  21   if test -n "${with_build_subdir}"; then
  22     libgcc_topdir="${srcdir}/../.."
  23     with_target_subdir=
  24   elif test -z "${with_target_subdir}"; then
  25     libgcc_topdir="${srcdir}/.."
  26   else
  27     if test "${with_target_subdir}" != "."; then
  28       libgcc_topdir="${srcdir}/${with_multisrctop}../.."
  29     else
  30       libgcc_topdir="${srcdir}/${with_multisrctop}.."
  31     fi
  32   fi
  33 else
  34   libgcc_topdir="${srcdir}/.."
  35 fi
  36 AC_SUBST(libgcc_topdir)
  37 AC_CONFIG_AUX_DIR($libgcc_topdir)
  38
  39 AC_ARG_ENABLE(shared,
  40 [  --disable-shared        don't provide a shared libgcc],
  41 [
  42   case $enable_shared in
  43   yes | no) ;;
  44   *)
  45     enable_shared=no
  46     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
  47     for pkg in $enableval; do
  48       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
  49         enable_shared=yes
  50       fi
  51     done
  52     IFS="$ac_save_ifs"
  53     ;;
  54   esac
  55 ], [enable_shared=yes])
  56 AC_SUBST(enable_shared)
  57
  58 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
  59 AC_ARG_ENABLE(version-specific-runtime-libs,
  60 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
  61 [case "$enableval" in
  62  yes) version_specific_libs=yes ;;
  63  no)  version_specific_libs=no ;;
  64  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
  65  esac],
  66 [version_specific_libs=no])
  67 AC_MSG_RESULT($version_specific_libs)
  68
  69 AC_ARG_WITH(slibdir,
  70 [  --with-slibdir=DIR      shared libraries in DIR [LIBDIR]],
  71 slibdir="$with_slibdir",
  72 if test "${version_specific_libs}" = yes; then
  73   slibdir='$(libsubdir)'
  74 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
  75   slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
  76 else
  77   slibdir='$(libdir)'
  78 fi)
  79 AC_SUBST(slibdir)
  80
  81 # Command-line options.
  82 # Very limited version of AC_MAINTAINER_MODE.
  83 AC_ARG_ENABLE([maintainer-mode],
  84   [AC_HELP_STRING([--enable-maintainer-mode],
  85                  [enable make rules and dependencies not useful (and
  86                   sometimes confusing) to the casual installer])],
  87   [case ${enable_maintainer_mode} in
  88      yes) MAINT='' ;;
  89      no) MAINT='#' ;;
  90      *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
  91    esac
  92    maintainer_mode=${enableval}],
  93   [MAINT='#'])
  94 AC_SUBST([MAINT])dnl
  95
  96 AC_PROG_INSTALL
  97
  98 AC_PROG_AWK
  99 # We need awk; bail out if it's missing.
 100 case ${AWK} in
 101   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 102 esac
 103
 104 AC_CANONICAL_HOST
 105 ACX_NONCANONICAL_HOST
 106 GCC_TOPLEV_SUBDIRS
 107
 108 dnl These must be called before AM_PROG_LIBTOOL, because it may want
 109 dnl to call AC_CHECK_PROG.
 110 AC_CHECK_TOOL(AR, ar)
 111 AC_CHECK_TOOL(LIPO, lipo, :)
 112 AC_CHECK_TOOL(NM, nm)
 113 AC_CHECK_TOOL(RANLIB, ranlib, :)
 114 AC_CHECK_TOOL(STRIP, strip, :)
 115 AC_PROG_LN_S
 116
 117 GCC_NO_EXECUTABLES
 118 AC_PROG_CC
 119 AC_PROG_CPP_WERROR
 120
 121 # Check for decimal float support.
 122 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
 123                [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
 124                                   [libgcc_cv_dfp=no])])
 125 decimal_float=$libgcc_cv_dfp
 126 AC_SUBST(decimal_float)
 127
 128 AC_ARG_ENABLE(decimal-float,
 129 [  --enable-decimal-float={no,yes,bid,dpd}
 130                         enable decimal float extension to C.  Selecting 'bid'
 131                         or 'dpd' choses which decimal floating point format
 132                         to use],
 133 [
 134   case $enable_decimal_float in
 135     yes | no | bid | dpd) ;;
 136     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
 137 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
 138   esac
 139 ],
 140 [
 141   case $host in
 142     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
 143       enable_decimal_float=yes
 144       ;;
 145     *)
 146       enable_decimal_float=no
 147       ;;
 148   esac
 149 ])
 150
 151 # x86's use BID format instead of DPD
 152 if test x$enable_decimal_float = xyes; then
 153   case $host in
 154     i?86*-*-linux* | x86_64*-*-linux*)
 155       enable_decimal_float=bid
 156       ;;
 157     *)
 158       enable_decimal_float=dpd
 159       ;;
 160   esac
 161 fi
 162 AC_SUBST(enable_decimal_float)
 163
 164 # Check for fixed-point support.
 165 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
 166                [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
 167                                   [libgcc_cv_fixed_point=no])])
 168 fixed_point=$libgcc_cv_fixed_point
 169 AC_SUBST(fixed_point)
 170
 171 # Check 32bit or 64bit for x86.
 172 case ${host} in
 173 i?86*-*-* | x86_64*-*-*)
 174   cat > conftest.c <<EOF
 175 #ifdef __x86_64__
 176 host_address=64
 177 #else
 178 host_address=32
 179 #endif
 180 EOF
 181     eval `${CC-cc} -E conftest.c | grep host_address=`
 182     rm -f conftest.c
 183     ;;
 184 esac
 185
 186 # Collect host-machine-specific information.
 187 . ${srcdir}/config.host
 188
 189 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
 190 # This is after config.host so we can augment tmake_file.
 191 # Link with -nostartfiles -nodefaultlibs since neither are present while
 192 # building libgcc.
 193 case ${host} in
 194 i?86-*-solaris2.1[[0-9]]*)
 195   cat > conftest.s <<EOF
 196         .section        .eh_frame,"a",@unwind
 197         .zero   4
 198         .section        .jcr,"aw",@progbits
 199         .zero   8
 200 EOF
 201   if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
 202       # configure expects config files in libgcc/config, so need a relative
 203       # path here.
 204       tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
 205   fi
 206   ;;
 207 esac
 208
 209 # Check for visibility support.  This is after config.host so that
 210 # we can check for asm_hidden_op.
 211 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
 212     libgcc_cv_hidden_visibility_attribute, [
 213         echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
 214         libgcc_cv_hidden_visibility_attribute=no
 215         if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
 216             if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
 217                 libgcc_cv_hidden_visibility_attribute=yes
 218             fi
 219         fi
 220         rm -f conftest.*
 221     ])
 222
 223 if test $libgcc_cv_hidden_visibility_attribute = yes; then
 224     vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
 225 else
 226     vis_hide=
 227 fi
 228 AC_SUBST(vis_hide)
 229
 230 # See if we have thread-local storage.  We can only test assembler
 231 # sicne link-time and run-time tests require the newly built
 232 # gcc, which can't be used to build executable due to that libgcc
 233 # is yet to be built here.
 234 GCC_CHECK_CC_TLS
 235 set_have_cc_tls=
 236 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
 237   set_have_cc_tls="-DHAVE_CC_TLS"
 238 fi
 239 AC_SUBST(set_have_cc_tls)
 240
 241 # See if we have emulated thread-local storage.
 242 GCC_CHECK_EMUTLS
 243 set_use_emutls=
 244 if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
 245   set_use_emutls="-DUSE_EMUTLS"
 246 fi
 247 AC_SUBST(set_use_emutls)
 248
 249 # Conditionalize the makefile for this target machine.
 250 tmake_file_=
 251 for f in ${tmake_file}
 252 do
 253         if test -f ${srcdir}/config/$f
 254         then
 255                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
 256         fi
 257 done
 258 tmake_file="${tmake_file_}"
 259 AC_SUBST(tmake_file)
 260
 261 # Substitute configuration variables
 262 AC_SUBST(extra_parts)
 263 AC_SUBST(asm_hidden_op)
 264
 265 # We need multilib support.
 266 AC_CONFIG_FILES([Makefile])
 267 AC_CONFIG_COMMANDS([default],
 268   [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 269 if test -n "$CONFIG_FILES"; then
 270   # FIXME: We shouldn't need to set ac_file
 271   ac_file=Makefile
 272   . ${libgcc_topdir}/config-ml.in
 273 fi]],
 274 [[srcdir=${srcdir}
 275 host=${host}
 276 with_target_subdir=${with_target_subdir}
 277 with_multisubdir=${with_multisubdir}
 278 ac_configure_args="--enable-multilib ${ac_configure_args}"
 279 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 280 libgcc_topdir=${libgcc_topdir}
 281 CC="${CC}"
 282 ]])
 283 AC_OUTPUT