[clang-tools-extra] [clang-tidy] Stop ignoring `-std` argument in `check_clang_tidy.py` for C files (PR #150791)

[Victor Chernyakin via cfe-commits]

================
@@ -19,13 +18,16 @@ void notRelated(int A, int B) {}
 
 int addedTogether(int A, int B) { return add(A, B); } // NO-WARN: Passed to same function.
 
+// FIXME: This triggers a false positive: the "passed to same function" heuristic
+// can't map the parameter index 1 to A and B because myprint() has no
+// parameters.
+//     warning: 2 adjacent parameters of 'passedToSameKNRFunction' of similar type ('int')
+//     note: the first parameter in the range is 'A'
+//     note: the last parameter in the range is 'B'
+#if 0
+int myprint();
----------------
localspook wrote:

Writing out `int myprint(char*, int)` doesn't trigger the false positive. In general, I don't see why we should go out of our way to test incorrect behaviour.

https://github.com/llvm/llvm-project/pull/150791