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The checks for the 'z' and 't' format specifiers added in the original PR #143653 had some issues and were overly strict, causing some build failures and were consequently reverted at4c85bf2fe8. In the latest commit27c58629ec, I relaxed the checks for the 'z' and 't' format specifiers, so warnings are now only issued when they are used with mismatched types. The original intent of these checks was to diagnose code that assumes the underlying type of `size_t` is `unsigned` or `unsigned long`, for example: ```c printf("%zu", 1ul); // Not portable, but not an error when size_t is unsigned long ``` However, it produced a significant number of false positives. This was partly because Clang does not treat the `typedef` `size_t` and `__size_t` as having a common "sugar" type, and partly because a large amount of existing code either assumes `unsigned` (or `unsigned long`) is `size_t`, or they define the equivalent of size_t in their own way (such as sanitizer_internal_defs.h).2e67dcfdcd/compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h (L203)
//===----------------------------------------------------------------------===// // Clang Tools repository //===----------------------------------------------------------------------===// Welcome to the repository of extra Clang Tools. This repository holds tools that are developed as part of the LLVM compiler infrastructure project and the Clang frontend. These tools are kept in a separate "extra" repository to allow lighter weight checkouts of the core Clang codebase. All discussion regarding Clang, Clang-based tools, and code in this repository should be held using the standard Clang forums: https://discourse.llvm.org/c/clang https://discourse.llvm.org/c/clang/clang-tidy/71 https://discourse.llvm.org/c/clang/clangd/34 Code review for this tree should take place on Github: https://github.com/llvm/llvm-project/pulls?q=label%3Aclang-tools-extra If you find a bug in these tools, please file it in the LLVM bug tracker: https://github.com/llvm/llvm-project/issues/