2010-01-27 Matthias Klose <doko@ubuntu.com>

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

diff --git a/gcc/configure.ac b/gcc/configure.ac
index 9622c23..0d507e9 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3326,6 +3326,21 @@ LCF0:
       [ bl __tls_get_addr(x@tlsgd)],,
       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
          [Define if your assembler supports arg info for __tls_get_addr.])])
+
+    case $target in
+      *-*-aix*)
+       gcc_GAS_CHECK_FEATURE([.ref support],
+         gcc_cv_as_aix_ref, [2.21.0],,
+         [     .csect stuff[[rw]]
+            stuff:
+               .long 1
+               .extern sym
+               .ref sym
+         ],,
+         [AC_DEFINE(HAVE_AS_REF, 1,
+           [Define if your assembler supports .ref])])
+       ;;
+    esac
     ;;
 
   mips*-*-*)
@@ -3552,9 +3567,9 @@ Valid choices are 'yes' and 'no'.]) ;;
    [.type foo, @gnu_unique_object],,
 # Also check for ld.so support, i.e. glibc 2.11 or higher.
    [if test x$host = x$build -a x$host = x$target &&
-       glibcver=`ldd --version 2>/dev/null`; then
-      glibcmajor=`expr "$glibcver" : "ldd (GNU libc) \([[0-9]]*\)"`
-      glibcminor=`expr "$glibcver" : "ldd (GNU libc) [[0-9]]*\.\([[0-9]]*\)"`
+       glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
+      glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
+      glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
       if test "$glibcnum" -ge 2011 ; then
         enable_gnu_unique_object=yes
@@ -4134,8 +4149,8 @@ done
 rm -f Make-hooks
 touch Make-hooks
 target_list="all.cross start.encap rest.encap tags \
-       install-common install-man install-info install-pdf dvi pdf \
-       html uninstall info man srcextra srcman srcinfo \
+       install-common install-man install-info install-pdf install-html dvi \
+       pdf html uninstall info man srcextra srcman srcinfo \
        mostlyclean clean distclean maintainer-clean install-plugin"
 
 for t in $target_list
@@ -4297,30 +4312,32 @@ enable_plugin=yes; default_plugin=yes)
 
 pluginlibs=
 if test x"$enable_plugin" = x"yes"; then
-  # Check that the host supports -rdynamic and -ldl
-  have_rdynamic=no
-  have_dl=no
-  saved_LDFLAGS="$LDFLAGS"
-  saved_LIBS="$LIBS"
-  LIBS=
-
-  # Check -rdynamic
-  LDFLAGS="$LDFLAGS -rdynamic"
-  AC_MSG_CHECKING([for -rdynamic])
-  AC_TRY_LINK([],[return 0;],
-    [AC_MSG_RESULT([yes]); have_rdynamic=yes],
-    [AC_MSG_RESULT([no])])
-  if test x"$have_rdynamic" = x"yes" ; then
-    pluginlibs="-rdynamic"
+
+  AC_MSG_CHECKING([for exported symbols])
+  echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
+  ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
+  if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+    : # No need to use a flag
+  else
+    AC_MSG_CHECKING([for -rdynamic])
+    ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
+    if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
+      pluginlibs="-rdynamic"
+    else
+      enable_plugin=no
+    fi
   fi
 
   # Check -ldl
+  saved_LIBS="$LIBS"
   AC_SEARCH_LIBS([dlopen], [dl])
   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
     pluginlibs="$pluginlibs -ldl"
   fi
+  LIBS="$saved_LIBS"
 
   # Check that we can build shared objects with -fPIC -shared
+  saved_LDFLAGS="$LDFLAGS"
   LDFLAGS="$LDFLAGS -fPIC -shared"
   AC_MSG_CHECKING([for -fPIC -shared])
   AC_TRY_LINK(
@@ -4331,6 +4348,7 @@ if test x"$enable_plugin" = x"yes"; then
     pluginlibs=
     enable_plugin=no
   fi
+  LDFLAGS="$saved_LDFLAGS"
 
   # If plugin support had been requested but not available, fail.
   if test x"$enable_plugin" = x"no" ; then
@@ -4340,9 +4358,6 @@ Building GCC with plugin support requires a host that supports
 -fPIC, -shared, -ldl and -rdynamic.])
     fi
   fi
-
-  LDFLAGS="$saved_LDFLAGS"
-  LIBS="$saved_LIBS"
 fi
 
 AC_SUBST(pluginlibs)