[llvm-branch-commits] [compiler-rt] release/21.x: [sanitizer_common] Older Haiku needs _GNU_SOURCE (#156291) (PR #156303)

[via llvm-branch-commits]

https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/156303

Backport 27c80fba53cd44ff3d575c6049bf88ecf6c15bc2

Requested by: @brad0

>From 445f9780fd132c47fa813ff691db78b4f3375752 Mon Sep 17 00:00:00 2001
From: Brad Smith <brad at comstyle.com>
Date: Mon, 1 Sep 2025 06:06:50 -0400
Subject: [PATCH] [sanitizer_common] Older Haiku needs _GNU_SOURCE (#156291)
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Co-authored-by: Jérôme Duval <jerome.duval at gmail.com>
(cherry picked from commit 27c80fba53cd44ff3d575c6049bf88ecf6c15bc2)
---
 compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp
index f5cb85bc1bf30..530ff90c4cd16 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp
@@ -29,6 +29,7 @@
 #  include "sanitizer_solaris.h"
 
 #  if SANITIZER_HAIKU
+#    define _GNU_SOURCE
 #    define _DEFAULT_SOURCE
 #  endif