fortify-headers/include/unistd.h, branch annotations

Add `access` annotations

2025-11-14T12:55:31Z

Add `swab`

2025-10-31T21:16:21Z

Co-Authored-By: Sertonix

add initial clang support

2025-10-31T21:16:21Z

Co-Authored-By: jvoisin

avoid extension with clang

2025-10-31T21:16:21Z

It seems useless and triggers 'error: expected external declaration'

Make use of __builtin_dynamic_object_size

2025-10-31T21:16:21Z

GCC and Clang provide __builtin_dynamic_object_size (see documentation: https://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html), so we should make use of it when its available.

getgroups: do not trap on non-positive gidsetsize

2019-03-13T17:47:50Z

First, we should never check the size of __s if __l == 0 since the array is not going to be modified in that case. Second, negative __l is a well-defined error case (EINVAL) and we should never trap on a conforming code like this: r = getgroups(-1, NULL); if (r == -1) ... An example of non-desired behaviour for negative __l is the gnulib configure script which checks for getgroups(-1, ...) to catch some ancient FreeBSD kernel bug. The conftest binary traps even on good system (e.g. linux/musl) and the unnecessary getgroups wrapper is enforced for any project that uses gnulib. This patch also changes the size_t cast to avoid the explicit zero extension on systems where size_t differs from unsigned int.

Don't use extension in C++ code

2018-07-24T10:00:30Z

A few important notes: * __extension__ is a GNU C "alternate" keyword, not a C++ keyword.[1] * __extension__ is designed to work on "expressions"; it does work on #include_next in C mode, but it has no effect in C++ mode; the warning will still appear, if enabled, even with __extension__ preceding #include_next. This is because #include_next is not considered an expression in C++, so the compiler attaches __extension__ to the first expression of the header. All of this leads us to a build failure while building at least all Mozilla software. Moz has an alternate -isystem dir searched before /usr/include that overrides some headers, including . The first statement in each of these headers is a #pragma, and since __extension__ is looking for an expression, and #pragma is a "null" expression, we end up with the following error: dist/system_wrappers/features.h:1:9: error: '#pragma' is not allowed here Since __extension__ has no effect on #include_next in C++ mode anyway, and since it can cause breakage, this commit omits __extension__ in C++ mode. [1]: https://gcc.gnu.org/onlinedocs/gcc-6.4.0/gcc/Alternate-Keywords.html

Bump copyright year

2016-09-10T11:54:17Z

Fix confstr() check

2015-07-15T15:05:52Z

Do not crash unless the overflow would actually happen.

Add extension mark to include_next to silence -pedantic

2015-06-25T09:18:26Z

Signed-off-by: Steven Barth

fortify-headers/include/unistd.h, branch annotations

Add `access` annotations

Add `swab`

add initial clang support

avoid __extension__ with clang

Make use of __builtin_dynamic_object_size

getgroups: do not trap on non-positive gidsetsize

Don't use __extension__ in C++ code

Bump copyright year

Fix confstr() check

Add __extension__ mark to include_next to silence -pedantic

avoid extension with clang

Don't use extension in C++ code

Add extension mark to include_next to silence -pedantic