linux_like: unify SIGEV_THREAD_ID support

This effectively adds the constant for musl too, as last platform of
this category.

It has been supported in musl since

  7c71792e ("add support for SIGEV_THREAD_ID timers")

and was released with v1.2.2 in January 2021.

(FWIW, emscripten also supports this.)

Also double-checked that the `sigevent` struct is defined in the exact
same way.

Signed-off-by: Christoph Heiss <[email protected]>

Author: christoph-heiss

libc-test/semver/linux-gnu.txt

@@ -398,7 +398,6 @@ RWF_NOWAIT
 RWF_SYNC
 SECURITYFS_MAGIC
 SELINUX_MAGIC
-SIGEV_THREAD_ID
 SMACK_MAGIC
 SMB_SUPER_MAGIC
 SOL_CAIF

libc-test/semver/linux.txt

@@ -2846,6 +2846,7 @@ SHORT_INODE
 SIGEV_NONE
 SIGEV_SIGNAL
 SIGEV_THREAD
+SIGEV_THREAD_ID
 SIGIO
 SIGPOLL
 SIGPWR

src/unix/linux_like/android/mod.rs

@@ -1995,8 +1995,6 @@ pub const NLA_TYPE_MASK: c_int = !(NLA_F_NESTED | NLA_F_NET_BYTEORDER);
 
 pub const NLA_ALIGNTO: c_int = 4;
 
-pub const SIGEV_THREAD_ID: c_int = 4;
-
 pub const CIBAUD: crate::tcflag_t = 0o02003600000;
 pub const CBAUDEX: crate::tcflag_t = 0o010000;
 

src/unix/linux_like/linux/gnu/mod.rs

@@ -707,8 +707,6 @@ pub const PF_NFC: c_int = AF_NFC;
 pub const PF_VSOCK: c_int = AF_VSOCK;
 pub const PF_XDP: c_int = AF_XDP;
 
-pub const SIGEV_THREAD_ID: c_int = 4;
-
 pub const BUFSIZ: c_uint = 8192;
 pub const TMP_MAX: c_uint = 238328;
 pub const FOPEN_MAX: c_uint = 16;

src/unix/linux_like/linux/uclibc/mod.rs

@@ -243,8 +243,6 @@ pub const MCL_CURRENT: c_int = 0x0001;
 pub const MCL_FUTURE: c_int = 0x0002;
 pub const MCL_ONFAULT: c_int = 0x0004;
 
-pub const SIGEV_THREAD_ID: c_int = 4;
-
 pub const AF_VSOCK: c_int = 40;
 
 // Most `*_SUPER_MAGIC` constants are defined at the `linux_like` level; the

src/unix/linux_like/mod.rs

@@ -1352,6 +1352,8 @@ pub const CLD_CONTINUED: c_int = 6;
 pub const SIGEV_SIGNAL: c_int = 0;
 pub const SIGEV_NONE: c_int = 1;
 pub const SIGEV_THREAD: c_int = 2;
+#[cfg(any(not(target_env = "musl"), musl_v1_2_3))]
+pub const SIGEV_THREAD_ID: c_int = 4;
 
 pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;