re PR testsuite/55587 ([ASAN] Testsuite test c-c++-common/asan/memcmp-1.c fails…

re PR testsuite/55587 ([ASAN] Testsuite test c-c++-common/asan/memcmp-1.c fails to link on targets without libasan/libsanitizer)

	PR testsuite/55587
	* lib/asan-dg.exp (asan_init): Return 1 if libasan has been found,
	0 if not.
	* g++.dg/asan/asan.exp: Don't run gcc-dg-runtest if [asan_init]
	returned 0.
	* gcc.dg/asan/asan.exp: Likewise.

From-SVN: r194134

gcc/testsuite/ChangeLog

+2012-12-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR testsuite/55587
+	* lib/asan-dg.exp (asan_init): Return 1 if libasan has been found,
+	0 if not.
+	* g++.dg/asan/asan.exp: Don't run gcc-dg-runtest if [asan_init]
+	returned 0.
+	* gcc.dg/asan/asan.exp: Likewise.
+
 2012-12-04  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/55124

gcc/testsuite/g++.dg/asan/asan.exp

@@ -26,11 +26,13 @@ if ![check_effective_target_faddress_sanitizer] {
 
 # Initialize `dg'.
 dg-init
-asan_init
+if [asan_init] {
 
 # Main loop.
 gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.C $srcdir/c-c++-common/asan/*.c]] ""
 
+}
+
 # All done.
 asan_finish
 dg-finish

gcc/testsuite/gcc.dg/asan/asan.exp

@@ -28,11 +28,13 @@ if ![check_effective_target_faddress_sanitizer] {
 
 # Initialize `dg'.
 dg-init
-asan_init
+if [asan_init] {
 
 # Main loop.
 gcc-dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.c $srcdir/c-c++-common/asan/*.c]] ""
 
+}
+
 # All done.
 asan_finish
 dg-finish

gcc/testsuite/lib/asan-dg.exp

@@ -91,6 +91,10 @@ proc asan_init { args } {
 	    set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=address -g"
 	}
     }
+    if { $link_flags != "" } {
+	return 1
+    }
+    return 0
 }
 
 #