fortify-headers/include, branch experimental

Add a missing FORTIFY_PEDANTIC_CHECKS

2025-10-28T22:18:21Z

Fixing the following issue: ``` In file included from xstrndup.c:34: /OpenWrt/aarch64/staging_dir/toolchain-aarch64_cortex-a53_gcc-14.3.0_musl/include/fortify/string.h: In function 'mempcpy': /OpenWrt/aarch64/staging_dir/toolchain-aarch64_cortex-a53_gcc-14.3.0_musl/include/fortify/string.h:340:13: error: 'nonnull' argument '__d' compared to NULL [-Werror=nonnull-compare] 340 | if (!__d || !__s) | ^~~~ /OpenWrt/aarch64/staging_dir/toolchain-aarch64_cortex-a53_gcc-14.3.0_musl/include/fortify/string.h:340:21: error: 'nonnull' argument '__s' compared to NULL [-Werror=nonnull-compare] 340 | if (!__d || !__s) | ^~~~ cc1: all warnings being treated as errors make[5]: *** [Makefile:511: xstrndup.o] Error 1 ``` Reported in https://github.com/openwrt/openwrt/pull/20552

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

Check if FORTIFY_USE_NATIVE_CHK is defined

2025-10-28T17:12:50Z

The previews code tried to get the value defined for FORTIFY_USE_NATIVE_CHK and this resulted in some build errors like this: ``` /include/fortify/stdio.h: In function 'vsnprintf': /include/fortify/stdio.h:155:49: error: "FORTIFY_USE_NATIVE_CHK" is not defined, evaluates to 0 [-Werror=undef] 155 | #if __has_builtin(__builtin___vsnprintf_chk) && FORTIFY_USE_NATIVE_CHK | ^~~~~~~~~~~~~~~~~~~~~~ ``` Check if it is defined instead. Signed-off-by: Hauke Mehrtens

poll: Check if _REDIR_TIME64 is defined

2025-10-28T17:12:42Z

Treat _REDIR_TIME64 being undefined like being set to 0. This fixes the following compile error in strace: ``` In file included from pathtrace.c:12: /include/fortify/poll.h:46:30: error: "_REDIR_TIME64" is not defined, evaluates to 0 [-Werror=undef] 46 | #if defined(_GNU_SOURCE) && !_REDIR_TIME64 | ^~~~~~~~~~~~~ cc1: all warnings being treated as errors ``` Signed-off-by: Hauke Mehrtens

Add `swab`

2025-10-12T12:47:11Z

Make the overlap check pedantic only since some software seems to rely on glibc working when src and dest are the same.

Bump actions/upload-pages-artifact from v1 to v3

2025-05-12T16:52:20Z

Fix a compilation error on C99

2025-01-28T12:18:31Z

Add some ifdef guards around `getlogin_r`.

Neuter an issue in strncat

2024-10-21T13:04:50Z

`strlen(src)` isn't guaranteed to be valid.