fortran/

[pf3gnuchains/gcc-fork.git] / gcc / configure.ac

diff --git a/gcc/configure.ac b/gcc/configure.ac
index 32a0664..a78a1d7 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -623,6 +623,32 @@ AC_ARG_ENABLE(multilib,
 [], [enable_multilib=yes])
 AC_SUBST(enable_multilib)
 
+# Determine whether or not multiarch is enabled.
+AC_ARG_ENABLE(multiarch,
+[AS_HELP_STRING([--enable-multiarch],
+               [enable support for multiarch paths])],
+[case "${enableval}" in
+yes|no|auto) enable_multiarch=$enableval;;
+*) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
+esac], [enable_multiarch=auto])
+if test x${enable_multiarch} = xauto; then
+  if test x${with_native_system_header_dir} != x; then
+    ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
+    enable_multiarch=no
+  fi
+  if test x$host != x$target && test "x$with_sysroot" = x; then
+    ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
+    enable_multiarch=no
+  fi
+fi
+AC_MSG_CHECKING(for multiarch configuration)
+AC_SUBST(enable_multiarch)
+AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
+
+# needed for setting the multiarch name for soft-float/hard-float ABIs
+AC_SUBST(with_cpu)
+AC_SUBST(with_float)
+
 # Enable __cxa_atexit for C++.
 AC_ARG_ENABLE(__cxa_atexit,
 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
@@ -1187,6 +1213,22 @@ if test $gcc_cv_type_clock_t = yes; then
   [Define if <time.h> defines clock_t.])
 fi
 
+# Check if F_SETLKW is supported by fcntl.
+AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <fcntl.h>]], [[
+struct flock fl;
+fl.l_whence = 0;
+fl.l_start = 0;
+fl.l_len = 0;
+fl.l_pid = 0;
+return fcntl (1, F_SETLKW, &fl);]])],
+[ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
+if test $ac_cv_f_setlkw = yes; then
+  AC_DEFINE(HOST_HAS_F_SETLKW, 1,
+  [Define if F_SETLKW supported by fcntl.])
+fi
+
 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
 CFLAGS="$saved_CFLAGS"
 CXXFLAGS="$saved_CXXFLAGS"
@@ -3302,6 +3344,12 @@ elif test x$gcc_cv_ld != x; then
       gcc_cv_ld_static_dynamic=yes
   else
     case "$target" in
+      # AIX ld uses -b flags
+      *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
+       gcc_cv_ld_static_dynamic=yes
+       gcc_cv_ld_static_option="-bstatic"
+       gcc_cv_ld_dynamic_option="-bdynamic"
+       ;;
       # Tru64 UNIX support -noso/-so_archive instead of -Bstatic/-Bdynamic.
       alpha*-dec-osf*)
         gcc_cv_ld_static_dynamic=yes
@@ -3692,8 +3740,13 @@ foo:     nop
 
     # These two are used unconditionally by i386.[ch]; it is to be defined
     # to 1 if the feature is present, 0 otherwise.
+    as_ix86_gotoff_in_data_opt=
+    if test x$gas = xyes; then
+      as_ix86_gotoff_in_data_opt="--32"
+    fi
     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
-        gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
+      gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
+      [$as_ix86_gotoff_in_data_opt],
 [      .text
 .L0:
        nop
@@ -4443,7 +4496,9 @@ case "$target:$tm_file" in
     AC_CACHE_CHECK(linker support for omitting dot symbols,
     gcc_cv_ld_no_dot_syms,
     [gcc_cv_ld_no_dot_syms=no
-    if test $in_tree_ld = yes ; then
+    if test x"$ld_is_gold" = xyes; then
+      gcc_cv_ld_no_dot_syms=yes
+    elif test $in_tree_ld = yes ; then
       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
         gcc_cv_ld_no_dot_syms=yes
       fi
@@ -4480,7 +4535,9 @@ EOF
     AC_CACHE_CHECK(linker large toc support,
     gcc_cv_ld_large_toc,
     [gcc_cv_ld_large_toc=no
-    if test $in_tree_ld = yes ; then
+    if test x"$ld_is_gold" = xyes; then
+      gcc_cv_ld_large_toc=yes
+    elif test $in_tree_ld = yes ; then
       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
         gcc_cv_ld_large_toc=yes
       fi
@@ -4633,6 +4690,11 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library,
             $target_header_dir/bits/uClibc_config.h > /dev/null; then
          gcc_cv_libc_provides_ssp=yes
        fi
+      # all versions of Bionic support stack protector
+      elif test -f $target_header_dir/sys/cdefs.h \
+        && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
+           $target_header_dir/sys/cdefs.h > /dev/null; then
+         gcc_cv_libc_provides_ssp=yes
       fi]
        ;;
        *-*-gnu*)
@@ -5096,15 +5158,15 @@ if test x"$enable_plugin" = x"yes"; then
   AC_MSG_CHECKING([for exported symbols])
   if test "x$export_sym_check" != x; then
     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
-    ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
-    if $export_sym_check conftest | grep foobar > /dev/null; then
+    ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest$ac_exeext > /dev/null 2>&1
+    if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
       : # No need to use a flag
       AC_MSG_RESULT([yes])
     else
       AC_MSG_RESULT([yes])
       AC_MSG_CHECKING([for -rdynamic])
-      ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
-      if $export_sym_check conftest | grep foobar > /dev/null; then
+      ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest$ac_exeext > /dev/null 2>&1
+      if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
         plugin_rdynamic=yes
         pluginlibs="-rdynamic"
       else