fortify-headers/include/fortify-headers.h, branch experimental

Fix possible cast-mismatch spotted by `-Werror=cast-qual`

2025-10-28T22:16:05Z

Use C90-compliant comments

2025-10-28T22:13:42Z

fortify-headers: Remove __fh_has_builtin()

2025-10-28T19:09:50Z

GCC complains about the `defined` usage here. Just call `__has_builtin` directly. This fixes the following compile error when compiling strace: ``` In file included from /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/stdlib.h:27, from number_set.c:14: /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:26:30: error: this use of "defined" may not be portable [-Werror=expansion-to-defined] 26 | #define __fh_has_builtin(x) (__has_builtin(x) || defined(x)) | ^~~~~~~~~~~~~ /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:28:7: note: in expansion of macro '__fh_has_builtin' 28 | #if ! __fh_has_builtin(__builtin_trap) | ^~~~~~~~~~~~~~~~ /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:26:30: error: this use of "defined" may not be portable [-Werror=expansion-to-defined] 26 | #define __fh_has_builtin(x) (__has_builtin(x) || defined(x)) | ^~~~~~~~~~~~~ /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:73:29: note: in expansion of macro '__fh_has_builtin' 73 | #if _FORTIFY_SOURCE > 2 && __fh_has_builtin (__builtin_dynamic_object_size) | ^~~~~~~~~~~~~~~~ /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:26:30: error: this use of "defined" may not be portable [-Werror=expansion-to-defined] 26 | #define __fh_has_builtin(x) (__has_builtin(x) || defined(x)) | ^~~~~~~~~~~~~ /home/hauke/openwrt/openwrt/staging_dir/toolchain-aarch64_generic_gcc-14.3.0_musl/include/fortify/fortify-headers.h:158:5: note: in expansion of macro '__fh_has_builtin' 158 | #if __fh_has_builtin (__builtin_mul_overflow_p) | ^~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors ``` Signed-off-by: Hauke Mehrtens

Fix some pointer-arithmetic warnings

2024-06-15T13:46:35Z

This should fix the second part of #59

Fix some overlap mismatch

2024-04-24T15:14:46Z

This was caught by the following test: ``` int main(void) { char c[32]; memcpy(c, c + 16, 16); } ``` Reported-by: q66

Properly check for builtins

2024-01-13T19:34:19Z

Clang's [documentation](https://clang.llvm.org/docs/LanguageExtensions.html#has-builtin) says: > __has_builtin should not be used to detect support for a builtin macro; use #ifdef instead. So we're now using both, since it's often tedious/non-trivial to find out what is a macro and what is a compiler builtin, across compilers and C versions.

Improve __fh_overlap implementation

2023-12-27T15:17:55Z

Rename some macros to be more namespace-friendly

2023-12-15T22:50:43Z

Do not use static inline for C++ to avoid ODR violations

2023-12-15T21:50:23Z

Fixes https://github.com/jvoisin/fortify-headers/issues/31

Remove superfluous includes

2023-12-15T20:41:08Z

This should fix #32