Clear hwcap_2 with Sun ld

	* gcc.target/i386/clearcapv2.map: New file.
	* gcc.target/i386/i386.exp: Try it first before clearcap.map.

From-SVN: r188820

gcc/testsuite/ChangeLog

+2012-06-20  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* gcc.target/i386/clearcapv2.map: New file.
+	* gcc.target/i386/i386.exp: Try it first before clearcap.map.
+
 2012-06-19  Kaz Kojima  <kkojima@gcc.gnu.org>
 
 	* gcc.dg/stack-usage-1.c: Remove dg-options line for sh targets

gcc/testsuite/gcc.target/i386/clearcapv2.map

+# clear all hardware capabilities emitted by Sun as: the tests here
+# guard against execution at runtime
+# uses mapfile v2 syntax which is the only way to clear AT_SUN_CAP_HW2 flags
+$mapfile_version 2
+CAPABILITY {
+  HW = ;
+};

gcc/testsuite/gcc.target/i386/i386.exp

@@ -256,12 +256,23 @@ proc check_effective_target_rtm { } {
 
 # If the linker used understands -M <mapfile>, pass it to clear hardware
 # capabilities set by the Sun assembler.
-set clearcap_ldflags "-Wl,-M,$srcdir/$subdir/clearcap.map"
+# Try mapfile syntax v2 first which is the only way to clear hwcap_2 flags.
+set clearcap_ldflags "-Wl,-M,$srcdir/$subdir/clearcapv2.map"
 
-if [check_no_compiler_messages mapfile executable {
+if ![check_no_compiler_messages mapfilev2 executable {
+    int main (void) { return 0; }
+} $clearcap_ldflags ] {
+    # If this doesn't work, fall back to the less capable v1 syntax.
+    set clearcap_ldflags "-Wl,-M,$srcdir/$subdir/clearcap.map"
+
+    if ![check_no_compiler_messages mapfile executable {
 	int main (void) { return 0; }
-  } $clearcap_ldflags ] {
+    } $clearcap_ldflags ] {
+	unset clearcap_ldflags
+    }
+}
 
+if [info exists clearcap_ldflags] {
   if { [info procs gcc_target_compile] != [list] \
 	&& [info procs saved_gcc_target_compile] == [list] } {
     rename gcc_target_compile saved_gcc_target_compile