re PR testsuite/20771 (Duplicate PCH test names)

	PR testsuite/20771
	* lib/dg-pch.exp (dg-flags-pch): Add flags to make compile lines in
	test summary unique.

From-SVN: r188540

gcc/testsuite/ChangeLog

 2012-06-13  Janis Johnson  <janisjo@codesourcery.com>
 
+	PR testsuite/20771
+	* lib/dg-pch.exp (dg-flags-pch): Add flags to make compile lines in
+	test summary unique.
+
 	* lib/scanasm.exp (scan-assembler, scan-assembler-not, scan-hidden,
 	scan-not-hiddent, scan-file, scan-file-not, scan-stack-usage,
 	scan-stack-usage-not): Don't strip torture options from test name.

gcc/testsuite/lib/dg-pch.exp

@@ -50,14 +50,16 @@ proc dg-flags-pch { subdir test otherflags options suffix } {
 	    # Ensure that the PCH file is used, not the original header.
 	    file_on_host delete "$bname$suffix"
 
-	    dg-test -keep-output $test "$otherflags $flags -I." ""
+	    # The flags "-Dwith_PCH" and "-Dwithout_PCH" are to distinguish the
+	    # two compiles in test summary lines.
+	    dg-test -keep-output $test "$otherflags $flags -I. -Dwith_PCH" ""
 	    file_on_host delete "$bname$suffix.gch"
 	    if { !$have_errs } {
 		if { [ file_on_host exists "$bname.s" ] } {
 		    remote_upload host "$bname.s" "$bname.s-gch"
 		    remote_download host "$bname.s-gch"
 		    gcc_copy_files "[file rootname $test]${suffix}s" "$bname$suffix"
-		    dg-test -keep-output $test "$otherflags $flags -I." ""
+		    dg-test -keep-output $test "$otherflags $flags -I. -Dwithout_PCH" ""
 		    remote_upload host "$bname.s"
 		    set tmp [ diff "$bname.s" "$bname.s-gch" ]
 		    if { $tmp == 0 } {
@@ -89,4 +91,4 @@ proc dg-flags-pch { subdir test otherflags options suffix } {
 
 proc dg-pch { subdir test options suffix } {
   return [dg-flags-pch $subdir $test "" $options $suffix]
-}
\ No newline at end of file
+}