Disable automatic setting of clang target flags on old clang
Old versions of clang don't support this pragma, so we have to assume
that the user will have set the flags.
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/aesni.c b/library/aesni.c
index 9da9f1b..8e5bd55 100644
--- a/library/aesni.c
+++ b/library/aesni.c
@@ -36,7 +36,7 @@
#pragma GCC push_options
#pragma GCC target ("pclmul,sse2,aes")
#define MBEDTLS_POP_TARGET_PRAGMA
-#elif defined(__clang__)
+#elif defined(__clang__) && (__clang_major__ >= 5)
#pragma clang attribute push (__attribute__((target("pclmul,sse2,aes"))), apply_to=function)
#define MBEDTLS_POP_TARGET_PRAGMA
#endif