v0.5.1 does not build on musl with --features all

[jstarks]

This looks like it was broken in #359.

$ cargo check --target x86_64-unknown-linux-musl --features all
    Checking socket2 v0.5.1 (/home/john/src/socket2)
error[E0425]: cannot find value `DCCP_SOCKOPT_SERVICE` in crate `libc`
    --> src/sys/unix.rs:2452:23
     |
2452 |                 libc::DCCP_SOCKOPT_SERVICE,
     |                       ^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_SERVICE` in crate `libc`
    --> src/sys/unix.rs:2466:66
     |
2466 |         unsafe { getsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_SERVICE) }
     |                                                                  ^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_CCID` in crate `libc`
    --> src/sys/unix.rs:2475:66
     |
2475 |         unsafe { setsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_CCID, ccid) }
     |                                                                  ^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_TX_CCID` in crate `libc`
    --> src/sys/unix.rs:2486:66
     |
2486 |         unsafe { getsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_TX_CCID) }
     |                                                                  ^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_RX_CCID` in crate `libc`
    --> src/sys/unix.rs:2497:66
     |
2497 |         unsafe { getsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_RX_CCID) }
     |                                                                  ^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_SERVER_TIMEWAIT` in crate `libc`
    --> src/sys/unix.rs:2511:23
     |
2511 |                 libc::DCCP_SOCKOPT_SERVER_TIMEWAIT,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_SERVER_TIMEWAIT` in crate `libc`
    --> src/sys/unix.rs:2529:23
     |
2529 |                 libc::DCCP_SOCKOPT_SERVER_TIMEWAIT,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_SEND_CSCOV` in crate `libc`
    --> src/sys/unix.rs:2548:23
     |
2548 |                 libc::DCCP_SOCKOPT_SEND_CSCOV,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_SEND_CSCOV` in crate `libc`
    --> src/sys/unix.rs:2562:66
     |
2562 |         unsafe { getsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_SEND_CSCOV) }
     |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_RECV_CSCOV` in crate `libc`
    --> src/sys/unix.rs:2577:23
     |
2577 |                 libc::DCCP_SOCKOPT_RECV_CSCOV,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_RECV_CSCOV` in crate `libc`
    --> src/sys/unix.rs:2591:66
     |
2591 |         unsafe { getsockopt(self.as_raw(), libc::SOL_DCCP, libc::DCCP_SOCKOPT_RECV_CSCOV) }
     |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_QPOLICY_TXQLEN` in crate `libc`
    --> src/sys/unix.rs:2605:23
     |
2605 |                 libc::DCCP_SOCKOPT_QPOLICY_TXQLEN,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_QPOLICY_TXQLEN` in crate `libc`
    --> src/sys/unix.rs:2623:23
     |
2623 |                 libc::DCCP_SOCKOPT_QPOLICY_TXQLEN,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_AVAILABLE_CCIDS` in crate `libc`
    --> src/sys/unix.rs:2645:19
     |
2645 |             libc::DCCP_SOCKOPT_AVAILABLE_CCIDS,
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `DCCP_SOCKOPT_GET_CUR_MPS` in crate `libc`
    --> src/sys/unix.rs:2663:23
     |
2663 |                 libc::DCCP_SOCKOPT_GET_CUR_MPS,
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`

For more information about this error, try `rustc --explain E0425`.
error: could not compile `socket2` due to 15 previous errors

[Thomasdezeeuw]

Seems like these constant definitions are missing from libc for musl or musl itself. We can workaround this by disabling this API for musl, but ideally these constants would be added to libc.

[nekopsykose]

from what i can tell these constants actually come from the kernel headers (<linux/dccp.h>), they're not in glibc either (possibly a re-export of kernel headers like glibc does sometimes). if the libc crate exports these for some reason, it doesn't seem like it should be based on libc == gnu, rather just os == linux.

[Thomasdezeeuw]

This should be fixed with a new release of libc which includes rust-lang/libc#3136.

[playmyswift]

same error for me, it's still open?

[Thomasdezeeuw]

@playmyswift yes. I don't think libc had a release which include the pr that fixed this issues.

Once a new release is out I'll close this issue. Might be worth update our libc version and adding a CI check for musl.

[nekopsykose]

if you want a momentary workaround, put the following:

[patch.crates-io]
libc = { git = 'https://github.com/rust-lang/libc.git', rev = "e71a4c0b1fd40050f50844e2a752576bcb6b5edb" }

into Cargo.toml of your project that uses this, and run cargo update (with -p libc if you prefer). assuming nothing in your dep tree also explicitly specifies a libc version (i don't know how this resolution works), it will force upgrade libc to that revision with the fixed interface. perhaps https://doc.rust-lang.org/cargo/reference/overriding-dependencies.html would also be useful.

of course, this has no warranty, and is /generally/ not great practice. use it as a workaround only :)

0.2.140 was just released, so the next one is anywhere from a few weeks to months away, who knows. 0.2.141 will be the 'fixed' version.

[Thomasdezeeuw]

0.2.140 was just released, so the next one is anywhere from a few weeks to months away, who knows. 0.2.141 will be the 'fixed' version.

If someone opens a pr that bumps the version it could be hours away. It's very much a community driven project and it's usually very willing to make new releases.

[nekopsykose]

sure, that makes sense :) i just tend to not force people to make releases and wait, myself

[Thomasdezeeuw]

New release of libc was just merged rust-lang/libc#3177, so in a moment this will be fixed (after a manual update using cargo update).