[PATCH 1/1] newlib/libc/include/setjmp.h: Add returns_twice attribute to setjmp()

[Joel Sherrill]

The setjmp() function needs this attribute to help GCC avoid false
positives for the -Wclobbered warning. The -Wclobbered warning is
part of -Wextra.
---
 newlib/libc/include/setjmp.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/newlib/libc/include/setjmp.h b/newlib/libc/include/setjmp.h
index a2830b275..5c16321a4 100644
--- a/newlib/libc/include/setjmp.h
+++ b/newlib/libc/include/setjmp.h
@@ -17,7 +17,12 @@ void	longjmp (jmp_buf __jmpb, int __retval)
 #else
 void	longjmp (jmp_buf __jmpb, int __retval);
 #endif
-int	setjmp (jmp_buf __jmpb);
+
+#ifdef __GNUC__
+int	setjmp (jmp_buf __jmpb)
+			__attribute__ ((returns_twice));;
+#else
+#endif
 
 _END_STD_C
 
-- 
2.47.3