From bea3ed6f50776e19fd997bbb5923f592a3e3711f Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Mon, 23 Sep 2013 00:05:38 +0200
Subject: [PATCH] Detect internal system component build macros in
 <features.h>.

---
 libc/include/features.h | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/libc/include/features.h b/libc/include/features.h
index da5b2e29..1fc0e815 100644
--- a/libc/include/features.h
+++ b/libc/include/features.h
@@ -27,6 +27,20 @@
 
 #define __sortix_libc__ 1
 
+/* Detect whether we are a core system library. */
+#if __is_sortix_libc || __is_sortix_libm
+#if !defined(__is_sortix_system_library)
+#define __is_sortix_system_library 1
+#endif
+#endif
+
+/* Detect whether we are a core system component. */
+#if __is_sortix_kernel || __is_sortix_system_library
+#if !defined(__is_sortix_system_component)
+#define __is_sortix_system_component 1
+#endif
+#endif
+
 /* Support macro to ease testing the compiler version. */
 #define __GCC_PREREQ(gcc_major, gcc_minor) \
 	(((gcc_major) == __GNUC__ && (gcc_minor) >= __GNUC_MINOR__) || \
@@ -52,7 +66,7 @@
 #endif
 
 /* Sortix system components implicitly use the native API. */
-#if __is_sortix_libc || __is_sortix_kernel
+#if __is_sortix_system_component
 #define _SORTIX_SOURCE 1
 #endif