mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-31 13:04:42 +00:00
911a70381a
Distribute everything from `libm/` to better locations in the repo. `libm/libm/*` has not moved yet to avoid Git seeing the move as an edit to `Cargo.toml`. Files that remain to be merged somehow are in `etc/libm`.
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* This is meant to override Musl's src/include/features.h
|
|
*
|
|
* We use a separate file here to redefine some attributes that don't work on
|
|
* all platforms that we would like to build on.
|
|
*/
|
|
|
|
#ifndef FEATURES_H
|
|
#define FEATURES_H
|
|
|
|
/* Get the required `#include "../../include/features.h"` since we can't use
|
|
* the relative path. The C macros need double indirection to get a usable
|
|
* string. */
|
|
#define _stringify_inner(s) #s
|
|
#define _stringify(s) _stringify_inner(s)
|
|
#include _stringify(ROOT_INCLUDE_FEATURES)
|
|
|
|
#if defined(__APPLE__)
|
|
#define weak __attribute__((__weak__))
|
|
#define hidden __attribute__((__visibility__("hidden")))
|
|
|
|
/* We _should_ be able to define this as:
|
|
* _Pragma(_stringify(weak musl_ ## new = musl_ ## old))
|
|
* However, weak symbols aren't handled correctly [1]. So we manually write
|
|
* wrappers, which are in `alias.c`.
|
|
*
|
|
* [1]: https://github.com/llvm/llvm-project/issues/111321
|
|
*/
|
|
#define weak_alias(old, new) /* nothing */
|
|
|
|
#else
|
|
#define weak __attribute__((__weak__))
|
|
#define hidden __attribute__((__visibility__("hidden")))
|
|
#define weak_alias(old, new) \
|
|
extern __typeof(old) musl_ ## new \
|
|
__attribute__((__weak__, __alias__(_stringify(musl_ ## old))))
|
|
|
|
#endif /* defined(__APPLE__) */
|
|
|
|
#endif
|