Check for C standard version >= 23 for [[__fallthrough__]]

This avoids warnings with clang-18+ e.g. pprintint.h:256:6: error: [[]] attributes are a C23 extension [-Werror,-Wc23-extensions] Signed-off-by: Khem Raj <[email protected]>
dvidelabs · Feb 2, 2024 · 7c199e3 · 7c199e3
1 parent 1653ec9
commit 7c199e3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/flatcc/portable/pattributes.h b/include/flatcc/portable/pattributes.h
@@ -57,7 +57,7 @@ extern "C" {
 
 
 /* https://en.cppreference.com/w/c/language/attributes/fallthrough */
-#if PORTABLE_HAS_C_ATTRIBUTE(__fallthrough__)
+#if PORTABLE_HAS_C_ATTRIBUTE(__fallthrough__) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
 # define pattribute_fallthrough [[__fallthrough__]]
 #elif PORTABLE_HAS_ATTRIBUTE(__fallthrough__)
 # define pattribute_fallthrough __attribute__((__fallthrough__))