lib/macros.h - protect old compilers from use of modern features

no_sanitize(integer) is not in 3.5 (debian stable's version), but is
documented in 3.9. Exactly when it appeared isn't immediately obvious.

Signed-off-by: Phil Carmody <phil@dovecot.fi>

diff --git a/src/lib/macros.h b/src/lib/macros.h
index 566c176d19e4fa59d300db436e2fae88b7caad26..45af0b3b8a1c827ae61bec5ce11c4c73cd2e7ce9 100644 (file)
--- a/src/lib/macros.h
+++ b/src/lib/macros.h
@@ -184,7 +184,7 @@
 #  define likely(expr) expr
 #endif
 
-#if defined(__clang__)
+#if defined(__clang__) && ((__clang_major__ > 4) || (__clang_major__ == 3 && __clang_minor__ >= 9))
 #  define ATTR_UNSIGNED_WRAPS __attribute__((no_sanitize("integer")))
 #else
 #  define ATTR_UNSIGNED_WRAPS