[PATCH v3 3/5] cdefs.h: Enable __errordecl & __warnattr for Clang 14+

[Sergey Bugaev]

Clang 14 (released in March 2022) has added support for
attribute ((error)) and attribute ((warning)). Enable their usage when
Clang 14 or later is detected, to get nicer diagnostics.

https://reviews.llvm.org/D106030
https://github.com/llvm/llvm-project/commit/846e562dcc6a9a611d844dc0d123da95629a0567

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
---
 misc/sys/cdefs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 6ca8ca31..9b84043f 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -208,7 +208,7 @@
       : __ ## f ## _chk (__VA_ARGS__, (__osz) / (__s))))
 #endif
 
-#if __GNUC_PREREQ (4,3)
+#if __GNUC_PREREQ (4,3) || __glibc_clang_prereq (14,0)
 # define __warnattr(msg) __attribute__((__warning__ (msg)))
 # define __errordecl(name, msg) \
   extern void name (void) __attribute__((__error__ (msg)))
-- 
2.41.0