configure.ac (gcc_cv_as_cfi_directive): Disable cfi directives unless GCC and…

configure.ac (gcc_cv_as_cfi_directive): Disable cfi directives unless GCC and gas agree on using read-only .eh_frame...

	* configure.ac (gcc_cv_as_cfi_directive) [i?86-*-solaris*]:
	Disable cfi directives unless GCC and gas agree on using read-only
	.eh_frame sections for 64-bit.
	* configure: Regenerate.

From-SVN: r157151

gcc/ChangeLog

+2010-03-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* configure.ac (gcc_cv_as_cfi_directive) [i?86-*-solaris*]:
+	Disable cfi directives unless GCC and gas agree on using read-only
+	.eh_frame sections for 64-bit.
+	* configure: Regenerate.
+
 2010-03-01  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/43220

gcc/configure

@@ -21386,7 +21386,23 @@ else
 		sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
 	  gcc_cv_as_cfi_directive=no
 	else
-	  gcc_cv_as_cfi_directive=yes
+	  case "$target" in
+	    i?86-*-solaris2.1[0-9]*)
+	      # On Solaris/x86, make sure that GCC and gas agree on using
+	      # read-only .eh_frame sections for 64-bit.
+	      if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
+		$gcc_cv_objdump -h conftest.o 2>/dev/null | \
+			sed -e /.eh_frame/!d -e N | \
+			grep READONLY > /dev/null; then
+		gcc_cv_as_cfi_directive=yes
+	      else
+		gcc_cv_as_cfi_directive=no
+	      fi
+	      ;;
+	    *)
+	      gcc_cv_as_cfi_directive=yes
+	      ;;
+	  esac
 	fi
       else
         # no objdump, err on the side of caution

gcc/configure.ac

@@ -2272,7 +2272,23 @@ gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
 		sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
 	  gcc_cv_as_cfi_directive=no
 	else
-	  gcc_cv_as_cfi_directive=yes
+	  case "$target" in
+	    i?86-*-solaris2.1[[0-9]]*)
+	      # On Solaris/x86, make sure that GCC and gas agree on using
+	      # read-only .eh_frame sections for 64-bit.
+	      if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
+		$gcc_cv_objdump -h conftest.o 2>/dev/null | \
+			sed -e /.eh_frame/!d -e N | \
+			grep READONLY > /dev/null; then
+		gcc_cv_as_cfi_directive=yes
+	      else
+		gcc_cv_as_cfi_directive=no
+	      fi
+	      ;;
+	    *)
+	      gcc_cv_as_cfi_directive=yes
+	      ;;
+	  esac 
 	fi
       else
         # no objdump, err on the side of caution