Add OpenBSD's futex.h.

[m-ou-se]

This adds OpenBSD's src/sys/sys/futex.h.

[rust-highfive]

Some changes occurred in OpenBSD module

cc @semarie

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Amanieu (or someone else) soon.

Please see the contribution instructions for more information.

[semarie]

Some points:

• libc-test/build.rs needs to include sys/futex.h (for OpenBSD), else the CI will fail (github actions doesn't run it, but I am)
• libc-test/semver/openbsd.txt needs to include new public symbols
• timespec struct needs to be declared used inside src/unix/bsd/netbsdlike/openbsd/mod.rs (or using ::timespec instead of timespec)

[m-ou-se]

@semarie Thanks! How about now?

[semarie]

@m-ou-se my local CI still doesn't pass due to volatile arguments in the function (rust doesn't understand volatile).
so could you add a "futex" entry inside cfg.skip_fn() with a comment, in order to avoid checking the function ?

something like:

diff --git a/libc-test/build.rs b/libc-test/build.rs
index 27497fa7189..11c9c1d2e5c 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -505,6 +506,9 @@ fn test_openbsd(target: &str) {
             // https://marc.info/?l=openbsd-cvs&m=154723400730318
             "mincore" => true,
 
+            // futex has volative arguments, Rust doesn't understand them
+            "futex" => true,
+
             _ => false,
         }
     });

else, with it, all tests passed. I am fine with your PR.

[Amanieu]

@bors r+

[bors]

📌 Commit e5b9bc0 has been approved by Amanieu

[bors]

⌛ Testing commit e5b9bc0 with merge d260cea...

[bors]

☀️ Test successful - checks-actions, checks-cirrus-freebsd-11, checks-cirrus-freebsd-12, checks-cirrus-freebsd-13
Approved by: Amanieu
Pushing d260cea to master...