py/misc: Don't warn about a GNU extension for static assert macro.

jepler · dpgeorge · commit 33cf1ab3ccab · 2025-10-04T15:51:23.000+10:00
This warning was enabled by default on clang 17.0.0 on macOS 26. Disable it, because we want to make these checks at compile-time even if it requires an extension. Fixes issue #18116. Signed-off-by: Jeff Epler <jepler@unpythonic.net>
diff --git a/py/misc.h b/py/misc.h
@@ -83,6 +83,9 @@ typedef unsigned int uint;
 #if defined(_MSC_VER) || defined(__cplusplus)
 #define MP_STATIC_ASSERT_NONCONSTEXPR(cond) ((void)1)
 #else
+#if __clang__
+#pragma GCC diagnostic ignored "-Wgnu-folding-constant"
+#endif
 #define MP_STATIC_ASSERT_NONCONSTEXPR(cond) ((void)sizeof(char[1 - 2 * !(cond)]))
 #endif
 
