built_in: Add __noreturn marker

This can be used to mark functions which will call exit() by themselves.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 4 insertions, 0 deletions

diff --git a/built_in.h b/built_in.h
index 72618a0..8bea69c 100644
--- a/built_in.h
+++ b/built_in.h
@@ -89,6 +89,10 @@ typedef uint8_t		u8;
 # define noinline		__attribute__((noinline))
 #endif
 
+#ifndef __noreturn
+# define __noreturn		__attribute__((noreturn))
+#endif
+
 #ifndef __hidden
 # define __hidden		__attribute__((visibility("hidden")))
 #endif