From 634f254d282f119de7eeef22325045bffb5b1cf1 Mon Sep 17 00:00:00 2001
From: Mosder <git@mosder.eu>
Date: Thu, 8 Oct 2026 14:37:05 +0200
Subject: feat: added feature test macros for different OSes / libc's

---
 compat/compat.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'compat')

diff --git a/compat/compat.h b/compat/compat.h
index 8a7ef4a..0279eda 100644
--- a/compat/compat.h
+++ b/compat/compat.h
@@ -4,7 +4,12 @@
 #ifndef MOSLIB_COMPAT_H
 #define MOSLIB_COMPAT_H
 
-#define _GNU_SOURCE
+#define _GNU_SOURCE      1 // glibc, musl, Bionic, Cygwin
+#define _ALL_SOURCE      1 // AIX, z/OS, musl
+#define _DARWIN_C_SOURCE 1 // macOS
+#define _NETBSD_SOURCE   1 // NetBSD
+#define _OPENBSD_SOURCE  1 // OpenBSD
+#define __EXTENSIONS__   1 // Solaris
 
 // In C99 TU needs a declaration (which won't be the case if all functions are available)
 typedef void mos_compat_decl;
-- 
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