[clang] [clang] Catch missing format attributes (PR #70024)

[Aaron Puchert via cfe-commits]

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@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-format-attribute %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c99 -Wmissing-format-attribute %s
+
+#include <stdarg.h>
+#include <stdio.h>
+
+va_list args;
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aaronpuchert wrote:

This should be in the function body together with `va_start`.

https://github.com/llvm/llvm-project/pull/70024