add feat_ cfg aliases

[xtqqczze]

Resolve build failures on non-Linux platforms when selinux or smack features are enabled. The cfg attribute was missing target_os check, causing pre-commit hook failures.

[codspeed-hq]

Merging this PR will not alter performance

✅ 288 untouched benchmarks
⏩ 38 skipped benchmarks¹

---

_{Comparing xtqqczze:cfg_aliases/tests (94b785f) with main (ce08ea0)}

Footnotes

1. 38 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/fold/fold-zero-width is no longer failing!
Note: The gnu test tests/printf/printf-surprise is now being skipped but was previously passing.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/inotify-dir-recreate (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/printf/printf-surprise is now passing!

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/cut/bounded-memory. tests/cut/bounded-memory is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/date/date-locale-hour. tests/date/date-locale-hour is passing on 'main'. Maybe you have to rebase?
Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/cut/cut-huge-range is now being skipped but was previously passing.
Note: The gnu test tests/expand/bounded-memory is now being skipped but was previously passing.
Congrats! The gnu test tests/dd/no-allocate is now passing!
Congrats! The gnu test tests/seq/seq-epipe is now passing!

[naoNao89]

Checking uu_comm v0.6.0 (/Users/henri89/Documents/coreutils/src/uu/comm)
error[E0433]: failed to resolve: could not find `selinux` in `uucore`
   --> src/uu/id/src/id.rs:145:36
    |
145 |         selinux_supported: uucore::selinux::is_selinux_enabled(),
    |                                    ^^^^^^^ could not find `selinux` in `uucore`
    |
note: found an item that was configured out
   --> /Users/henri89/Documents/coreutils/src/uucore/src/lib/lib.rs:126:26
    |
125 | #[cfg(all(feature = "selinux", any(target_os = "linux", target_os = "android")))]
    |                                   -------------------------------------------- the item is gated here
126 | pub use crate::features::selinux;
    |                          ^^^^^^^

error[E0433]: failed to resolve: could not find `smack` in `uucore`
   --> src/uu/id/src/id.rs:147:34
    |
147 |         smack_supported: uucore::smack::is_smack_enabled(),
    |                                  ^^^^^ could not find `smack` in `uucore`
    |
note: found an item that was configured out
   --> /Users/henri89/Documents/coreutils/src/uucore/src/lib/lib.rs:129:26
    |
128 | #[cfg(all(target_os = "linux", feature = "smack"))]
    |           ------------------- the item is gated behind the `linux` feature
129 | pub use crate::features::smack;
    |                          ^^^^^

error[E0433]: failed to resolve: could not find `SecurityContext` in `selinux`
   --> src/uu/id/src/id.rs:184:43
    |
184 |             if let Ok(context) = selinux::SecurityContext::current(false) {
    |                                           ^^^^^^^^^^^^^^^ could not find `SecurityContext` in `selinux`

error[E0433]: failed to resolve: could not find `smack` in `uucore`
   --> src/uu/id/src/id.rs:198:27
    |
198 |             match uucore::smack::get_smack_label_for_self() {
    |                           ^^^^^ could not find `smack` in `uucore`
    |
note: found an item that was configured out
   --> /Users/henri89/Documents/coreutils/src/uucore/src/lib/lib.rs:129:26
    |
128 | #[cfg(all(target_os = "linux", feature = "smack"))]
    |           ------------------- the item is gated behind the `linux` feature
129 | pub use crate::features::smack;
    |                          ^^^^^

error[E0433]: failed to resolve: could not find `SecurityContext` in `selinux`
   --> src/uu/id/src/id.rs:711:39
    |
711 |         if let Ok(context) = selinux::SecurityContext::current(false) {
    |                                       ^^^^^^^^^^^^^^^ could not find `SecurityContext` in `selinux`

error[E0433]: failed to resolve: could not find `smack` in `uucore`
   --> src/uu/id/src/id.rs:723:36
    |
723 |         if let Ok(label) = uucore::smack::get_smack_label_for_self() {
    |                                    ^^^^^ could not find `smack` in `uucore`
    |
note: found an item that was configured out
   --> /Users/henri89/Documents/coreutils/src/uucore/src/lib/lib.rs:129:26
    |
128 | #[cfg(all(target_os = "linux", feature = "smack"))]
    |           ------------------- the item is gated behind the `linux` feature
129 | pub use crate::features::smack;
    |                          ^^^^^

For more information about this error, try `rustc --explain E0433`.
    Checking uu_chgrp v0.6.0 (/Users/henri89/Documents/coreutils/src/uu/chgrp)
error: could not compile `uu_id` (lib) due to 6 previous errors
warning: build failed, waiting for other jobs to finish..."

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/id/smack. tests/id/smack is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-no-root. tests/mkdir/smack-no-root is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-root. tests/mkdir/smack-root is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/cp/link-heap is now passing!

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/id/smack. tests/id/smack is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-no-root. tests/mkdir/smack-no-root is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-root. tests/mkdir/smack-root is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/rm/isatty. tests/rm/isatty is passing on 'main'. Maybe you have to rebase?
Skip an intermittent issue tests/tail/symlink (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/date/date-locale-hour is no longer failing!
Note: The gnu test tests/pr/bounded-memory is now being skipped but was previously passing.
Congrats! The gnu test tests/cp/link-heap is now passing!

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/cut/bounded-memory. tests/cut/bounded-memory is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/id/smack. tests/id/smack is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-no-root. tests/mkdir/smack-no-root is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-root. tests/mkdir/smack-root is passing on 'main'. Maybe you have to rebase?
Skip an intermittent issue tests/pr/bounded-memory (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/expand/bounded-memory is now being skipped but was previously passing.

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/date/resolution. tests/date/resolution is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/id/smack. tests/id/smack is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-no-root. tests/mkdir/smack-no-root is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/mkdir/smack-root. tests/mkdir/smack-root is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/cp/link-heap is now passing!

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/id/smack. tests/id/smack is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/date/date-locale-hour is no longer failing!
Note: The gnu test tests/expand/bounded-memory is now being skipped but was previously passing.
Congrats! The gnu test tests/cp/link-heap is now passing!

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/date/date-locale-hour is no longer failing!

[xtqqczze]

@naoNao89 I will fix the selinux/smack issues in #11016