The functions were sorted alphabetically for easier navigation, and less
confusion where to add a new one. The sorting of comptime exports was
done within the visual "blocks".
Instead of padding, use static entropy to detect corrupted header.
* 64-bit, safe modes: 10 canary bits
* 64-bit, unsafe modes: 0 canary bits
* 32-bit: 27 canary bits
A further enhancement, not done here, would be to upgrade from canary to
parity.
These functions can only be exported when external libc components are
available due to the errno location dependency. Note that even when zig
libc is complete, on Windows, errno location will always be external (in
ucrtbase.dll).
The vast majority of libc functions return `c_int` for the return value,
when setting errno. This utility function is for those cases.
Other cases can hand-roll the logic, or additional helpers can be added.
Since this is my first time contributing I wanted to keep it simple and I added just one function
I tested with
```bash
stage3/bin/zig build -p stage4 -Dno-lib -Dno-langref -Denable-llvm=true --search-prefix ~/repos/zig-boostrap/out/native-linux-musl-baseline/
stage4/bin/zig build test-libc -Dlibc-test-path=../libc-test -Dtest-target-filter=x86_64-linux-musl
```
and the tests passed.
I'm planning on doing more once I get the hang of it.
Co-authored-by: david <davidc.fried@gmail.com>
Reviewed-on: https://codeberg.org/ziglang/zig/pulls/30888
Reviewed-by: Andrew Kelley <andrew@ziglang.org>
Co-authored-by: Daggerfall-is-the-best-TES-game <daggerfall-is-the-best-tes-game@noreply.codeberg.org>
Co-committed-by: Daggerfall-is-the-best-TES-game <daggerfall-is-the-best-tes-game@noreply.codeberg.org>
LLVM 21 has started recognizing strlen-like idioms and optimizing them to strlen
calls, so we need this function provided in compiler-rt for libc-less
compilations.
* libc: implement common `abs` for various integer sizes
* libc: move imaxabs to inttypes.zig and don't use cInclude
* libc: delete `fabs` c implementations because already implemented in compiler_rt
* libc: export functions depending on the target libc
Previously all the functions that were exported were handled equally,
though some may exist and some not inside the same file. Moving the
checks inside the file allows handling different functions differently
* remove empty ifs in inttypes
Co-authored-by: Alex Rønne Petersen <alex@alexrp.com>
* remove empty ifs in stdlib
Co-authored-by: Alex Rønne Petersen <alex@alexrp.com>
* libc: use `@abs` for the absolute value calculation
---------
Co-authored-by: Alex Rønne Petersen <alex@alexrp.com>
This prevents symbols from these libraries from polluting the dynamic symbol
tables of binaries built with Zig. The downside is that we no longer deduplicate
the symbols at run time due to weak linkage.
Closes#7935.
Closes#13303.
Closes#19342.
* Introduce common `bzero` libc implementation.
* Update test name according to review
Co-authored-by: Linus Groh <mail@linusgroh.de>
* address code review
- import common implementation when musl or wasi is included
- don't use `c_builtins`, use `@memset`
* bzero calling conv to .c
* Apply review
Co-authored-by: Veikka Tuominen <git@vexu.eu>
---------
Co-authored-by: Linus Groh <mail@linusgroh.de>
Co-authored-by: Veikka Tuominen <git@vexu.eu>
mihael