[COMMITTED] testsuite: Fix weak_undefined handling on Darwin

[COMMITTED] testsuite: Fix weak_undefined handling on Darwin

[Rainer Orth]

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The patch that introduced the weak_undefined effective-target keyword
and corresponding dg-add-options support

commit 378ec7b87a5265dbe2d489c245fac98ef37fa638
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Thu Mar 23 00:45:05 2023 -0300

    [testsuite] test for weak_undefined support and add options

badly broke the affected tests on macOS like so:

ERROR: gcc.dg/addr_equal-1.c: unknown dg option: 89 for " dg-add-options 5 weak_undefined "
ERROR: gcc.dg/addr_equal-1.c: unknown dg option: 89 for " dg-add-options 5 weak_undefined "

add_options_for_weak_undefined tries to call an non-existant proc "89".
Even after fixing this by escaping the brackets, two tests still failed
to link since they lacked the corresponding calls do dg-add-options
weak_undefined.

Tested on x86_64-apple-darwin20.6.0 and i386-pc-solaris2.11.

Committed to trunk.

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2023-03-27  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc/testsuite:
	* lib/target-supports.exp (add_options_for_weak_undefined): Escape
	brackets.
	* gcc.dg/visibility-22.c: Add weak_undefined options.

	libgomp:
	* testsuite/libgomp.oacc-c-c++-common/routine-nohost-2.c: Add
	weak_undefined options.


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diff --git a/gcc/testsuite/gcc.dg/visibility-22.c b/gcc/testsuite/gcc.dg/visibility-22.c
--- a/gcc/testsuite/gcc.dg/visibility-22.c
+++ b/gcc/testsuite/gcc.dg/visibility-22.c
@@ -3,6 +3,7 @@
 /* { dg-require-visibility "" } */
 /* { dg-require-effective-target weak_undefined } */
 /* { dg-options "-O2 -fPIC" { target fpic } } */
+/* { dg-add-options weak_undefined } */
 
 extern void foo () __attribute__((weak,visibility("hidden")));
 int
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -361,7 +361,7 @@ proc check_weak_available { } {
 proc add_options_for_weak_undefined { flags } {
     if { [istarget *-*-darwin*] } {
 	lappend flags "-Wl,-undefined,dynamic_lookup"
-	if { [istarget *-*-darwin[89]*] } {
+	if { [istarget *-*-darwin\[89\]*] } {
 	    lappend flags "-Wl,-flat_namespace"
 	}
     }
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/routine-nohost-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/routine-nohost-2.c
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/routine-nohost-2.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/routine-nohost-2.c
@@ -8,6 +8,7 @@
 /* { dg-additional-sources routine-nohost-2_2.c } */
 
 /* { dg-additional-options "-fno-inline" } for stable results regarding OpenACC 'routine'.  */
+/* { dg-add-options weak_undefined } */
 
 #include <assert.h>
 #include <openacc.h>