Add plugin visibility test

* ld-plugin/func1p.c: New file.
	* ld-plugin/func2i.c: Likewise.
	* ld-plugin/func3h.c: Likewise.

	* ld-plugin/plugin.exp (plugin_extra_elf_tests): Add plugin
	visibility test.

ld/testsuite/ChangeLog

@@ -1,3 +1,12 @@
+2012-12-07  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* ld-plugin/func1p.c: New file.
+	* ld-plugin/func2i.c: Likewise.
+	* ld-plugin/func3h.c: Likewise.
+
+	* ld-plugin/plugin.exp (plugin_extra_elf_tests): Add plugin
+	visibility test.
+
 2012-12-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* lib/ld-lib.exp (check_lto_available): New.  Check if compiler

ld/testsuite/ld-plugin/func1p.c

@@ -0,0 +1,8 @@
+extern int retval;
+
+int
+__attribute__ ((visibility ("protected")))
+func1 (void)
+{
+  return retval;
+}

ld/testsuite/ld-plugin/func2i.c

@@ -0,0 +1,8 @@
+extern int retval;
+
+int
+__attribute__ ((visibility ("internal")))
+func2 (void)
+{
+  return retval;
+}

ld/testsuite/ld-plugin/func3h.c

@@ -0,0 +1,8 @@
+extern int retval;
+
+int
+__attribute__ ((visibility ("hidden")))
+func3 (void)
+{
+  return retval;
+}

ld/testsuite/ld-plugin/plugin.exp

@@ -157,7 +157,11 @@ set plugin_extra_elf_tests [list \
 			-plugin-opt sym:${_}func3::0:3:0 \
 			-plugin-opt dumpresolutions \
 			-plugin-opt add:tmpdir/func.o \
-    $testobjfiles $libs --verbose=2" "" "" {{ld plugin-12.d}} "main.x" ] \
+			-plugin-opt add:tmpdir/func1p.o \
+			-plugin-opt add:tmpdir/func2i.o \
+			-plugin-opt add:tmpdir/func3h.o \
+    $testobjfiles $libs --verbose=2" "" "" {{ld plugin-12.d} \
+				{readelf -s plugin-vis-1.d}} "main.x" ] \
 ]
 
 if { !$can_compile || $failed_compile } {
@@ -174,7 +178,10 @@ if { !$can_compile || $failed_compile } {
 
 run_ld_link_tests $plugin_tests
 
-if { [is_elf_format] } {
+if { [is_elf_format] \
+     && [ld_compile "$CC $CFLAGS" $srcdir/$subdir/func1p.c tmpdir/func1p.o] \
+     && [ld_compile "$CC $CFLAGS" $srcdir/$subdir/func2i.c tmpdir/func2i.o] \
+     && [ld_compile "$CC $CFLAGS" $srcdir/$subdir/func3h.c tmpdir/func3h.o] } {
     run_ld_link_tests $plugin_extra_elf_tests
 }