2009-09-23 Yuri Gribov <tetra2005@googlemail.com>

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

diff --git a/gcc/configure.ac b/gcc/configure.ac
index d1eed72..3f0ff7d 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3315,6 +3315,51 @@ x:
       fi
     fi
     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
+
+    AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
+      [gcc_cv_ld_mips_personality_relaxation],
+      [gcc_cv_ld_mips_personality_relaxation=no
+       if 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_mips_personality_relaxation=yes
+        fi
+       elif test x$gcc_cv_as != x \
+                        -a x$gcc_cv_ld != x \
+                -a x$gcc_cv_readelf != x ; then
+        cat > conftest.s <<EOF
+       .cfi_startproc
+       .cfi_personality 0x80,indirect_ptr
+       .ent test
+test:
+       nop
+       .end test
+       .cfi_endproc
+
+       .section .data,"aw",@progbits
+indirect_ptr:
+       .dc.a personality
+EOF
+        if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
+           && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
+          if $gcc_cv_readelf -d conftest 2>&1 \
+             | grep TEXTREL > /dev/null 2>&1; then
+            :
+          elif $gcc_cv_readelf --relocs conftest 2>&1 \
+               | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
+            :
+          else
+            gcc_cv_ld_mips_personality_relaxation=yes
+          fi
+        fi
+       fi
+       rm -f conftest.s conftest.o conftest])
+    if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
+           AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
+      [Define if your linker can relax absolute .eh_frame personality
+pointers into PC-relative form.])
+    fi
     ;;
 esac