[sanitizer_common] Older Haiku needs _GNU_SOURCE (#156291)

brad0 · korli · web-flow · commit 27c80fba53cd · 2025-09-01T06:06:50.000-04:00
Co-authored-by: Jérôme Duval &lt;jerome.duval@gmail.com&gt;
diff --git 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
 
