[gcc r17-3960] testsuite, Darwin: Handle __weak predefine.

[Iain D Sandoe via Gcc-cvs]

https://gcc.gnu.org/g:8f0912e5a88a3470145725e7b00a65770658f335

commit r17-3960-g8f0912e5a88a3470145725e7b00a65770658f335
Author: Iain Sandoe <i...@sandoe.co.uk>
Date:   Sat Sep 5 16:17:42 2026 +0100

    testsuite, Darwin: Handle __weak predefine.
    
    Darwin predefines '__weak' for c-family which clashes with the use
    in the test-case. Undefine it for the test purposes.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/lto/attr-weakref-2_0.c: Undefine '__weak' for this
            test.
    
    Signed-off-by: Iain Sandoe <i...@sandoe.co.uk>

Diff:
---
 gcc/testsuite/gcc.dg/lto/attr-weakref-2_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/lto/attr-weakref-2_0.c 
b/gcc/testsuite/gcc.dg/lto/attr-weakref-2_0.c
index a55ef28bd131..09e4fbef7e4b 100644
--- a/gcc/testsuite/gcc.dg/lto/attr-weakref-2_0.c
+++ b/gcc/testsuite/gcc.dg/lto/attr-weakref-2_0.c
@@ -1,6 +1,9 @@
 /* { dg-lto-do link } */
 /* { dg-lto-options {{-O2 -flto}} } */
 
+#if __APPLE__
+# undef __weak
+#endif
 #define __weak __attribute__((__weak__))
 void __weak other() {}
 void __weak fn() {}