Enable copy_file_range on FreeBSD
PR #2479 did this, but only in the freebsd13 and freebsd14 modules, which was incorrect. Those modules should only be used for functions that change across FreeBSD versions, and therefore need different ELF symbol versions. Functions that were newly added since FreeBSD 11 can still go in the base freebsd module. It will cause no problems for them to be there, and users will see an error at link time if they try to use such a function in an environment that is too old to support it.
PR #2479 did this, but only in the freebsd13 and freebsd14 modules,
which was incorrect. Those modules should only be used for functions
that change across FreeBSD versions, and therefore need different ELF
symbol versions. Functions that were newly added since FreeBSD 11 can
still go in the base freebsd module. It will cause no problems for them
to be there, and users will see an error at link time if they try to
use such a function in an environment that is too old to support it.
This flag allows the child process created by POSIX spawn to create
a new session and become leader of a new process group. Expose the
flag so that Rust code can use it.
add dirname and basename
This PR adds `dirname(3)` and `basename(3)` on the following platforms:
* Linux with glibc
* Linux with musl
* Android
* FreeBSD
* DragonFlyBSD
* NetBSD
* OpenBSD
* Apple platforms
I tested this PR on my host machine (Linux with glibc), and got the following error:
```
RUNNING ALL TESTS
bad basename function pointer: rust: 140093945892128 (0x7f6a29e14d20) != c 140093945544944 (0x7f6a29dc00f0)
thread 'main' panicked at 'some tests failed', /home/steve/Documents/workspace/libc/target/debug/build/libc-test-592f01d15ee93e7a/out/main.rs:12:21
stack backtrace:
0: std::panicking::begin_panic
at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/std/src/panicking.rs:616:12
1: main::main
at /home/steve/Documents/workspace/libc/target/debug/build/libc-test-592f01d15ee93e7a/out/main.rs:12:21
2: core::ops::function::FnOnce::call_once
at /rustc/a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52/library/core/src/ops/function.rs:248:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: test failed, to rerun pass '--test main'
```
The reason for this error probably is that there are two `basename(3)` on Linux with glibc, the POSIX version and the GNU version, and they clash with each other. In C, if one `#include <libgen.h>`, then the POSIX version will be available; If one ` #define _GNU_SOURCE` and `#include <string.h>`, then the GNU one will be used.
Can we distinguish them in `libc`?
haotuo