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macOS link fails: cargo run --example locks

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
30/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
rust
Domain
operating-systems

Research direction

Start by reproducing the failure with cargo run --example locks on macOS and inspect the platform-specific references to pthread_rwlock_timedrdlock() and pthread_rwlock_timedwrlock(). Research a macOS-compatible replacement, then verify that the locks example links and runs successfully on macOS.

Written by the indexing model from the issue text.

Description

On macos, the following two functions don't appear to be available. So the following fails to link or run:
cargo run --example locks
You can see the log at the end of this post.

These are the missing funcs on macOS:

pthread_rwlock_timedrdlock()
pthread_rwlock_timedwrlock()

Interestingly enough, pthread_mutex_timedlock is also not available on macOS, but an implementation
has been provided under if #[cfg(target_os = "macos")] {...
I wonder if there might be equivalents for pthread_rwlock_timed..lock() where that came from?
It also appears glibc offers a replacement mentioned HERE

I am checking to see the authors can suggest where to get a good replacement.
Or if the authors have a good idea about how to fix this?
Thanks, Cameron

c@macmini ~/D/r/raw_sync-rs (master) [101]> cargo run --example locks
   Compiling raw_sync v0.1.5 (/Users/c/Documents/rs/raw_sync-rs)
error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-m64" "-arch" "x86_64" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.15vmvh72pfa6pnzf.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.1mhvuom1vif64dgp.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.1nl61rjywspj6e2l.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.1o5ku221nvivr1uo.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.20f4z4xoaa4w16j2.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.305h8lr7mfiyvwk4.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.30vnonx6dsngno0.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.34f01fvt4tquz6bz.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.3if3fqhg66h5j3qc.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.3kwmzklrjj7szlxh.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.3pq4vkndw1lzgsvy.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.3pu8s3f0iawz77x2.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.3ql9hfh7lk3uackc.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.40tz8klf0lpn4d4b.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.40uutlfvdgcb5buq.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.410vfbp1bswddlhj.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.42lk811q1nz7fw2h.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4722xntt5b9kowto.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.49tyyy7rkj9wr8p3.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4eo467iqjixrgbhi.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4g6r51ny6t1xj114.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4gt8305f6hgug1cv.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4qj2n04vsin1xn6e.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4wzor2jn3qhctwux.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.50qyhnzsci8nyn3l.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.512o8ca57zr2z10l.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.53jhgxekh2wxbkj.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.56oqlofvcytp228h.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.5ckzsuoquucy7rce.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.gy20ewq43yt2s6a.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.qh8fiu2davjyhki.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.qqyn39fzeof6vo1.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.tqvsw7p2sm0oqxr.rcgu.o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c.4gu86rmkv73c909f.rcgu.o" "-L" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps" "-L" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libraw_sync-9e3b62dd02c25d59.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libnix-31bfd5723b91edc4.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libbitflags-5807c7dc27ea64c8.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libmemoffset-0059bcb888f9d093.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libenv_logger-2fb8cd88855d6469.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libatty-0f41ef3414cde949.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/liblibc-c9fbfbcd791abe60.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libtermcolor-934608461d59bee3.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libhumantime-6ae3b1203ddc3145.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/liblog-6692e0a188c29cee.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libcfg_if-7e74d31581507915.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libregex-eac4b23977649399.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libaho_corasick-bd486f8f47a9c700.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libmemchr-7874de389e22e218.rlib" "/Users/c/Documents/rs/raw_sync-rs/target/debug/deps/libregex_syntax-3d679e5b759db215.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libstd-04b20da5d2b4e02d.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libpanic_unwind-00f5b50d82ace1e3.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libobject-45c041bae4e30a62.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libmemchr-1bc22f5f5be77a23.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libaddr2line-caa784d0cecbd501.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libgimli-0ad46247e89234f6.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_demangle-68dabd8f37218f7c.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libstd_detect-4c67204728564461.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libhashbrown-eca93a0d11ef9a39.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_alloc-6ddabe46ef182f8b.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libunwind-7dc1037a76f2c18c.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcfg_if-100dc4191a6287d7.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liblibc-c596c47fc21af016.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/liballoc-c7163fef4a8cdd33.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/librustc_std_workspace_core-3463abc69f183e66.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcore-12a50039d8929e4e.rlib" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib/libcompiler_builtins-a4134bbc9f4f0dab.rlib" "-liconv" "-lSystem" "-lresolv" "-lc" "-lm" "-liconv" "-L" "/Users/c/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/x86_64-apple-darwin/lib" "-o" "/Users/c/Documents/rs/raw_sync-rs/target/debug/examples/locks-adce1879609c609c" "-Wl,-dead_strip" "-nodefaultlibs"
  = note: Undefined symbols for architecture x86_64:
            "_pthread_rwlock_timedrdlock", referenced from:
                _$LT$raw_sync..locks..unix..RwLock$u20$as$u20$raw_sync..locks..LockImpl$GT$::try_rlock::h3295aa08710fdf36 in libraw_sync-9e3b62dd02c25d59.rlib(raw_sync-9e3b62dd02c25d59.2j047qgu8yj7k2nx.rcgu.o)
            "_pthread_rwlock_timedwrlock", referenced from:
                _$LT$raw_sync..locks..unix..RwLock$u20$as$u20$raw_sync..locks..LockImpl$GT$::try_lock::ha1e205a6fe064f36 in libraw_sync-9e3b62dd02c25d59.rlib(raw_sync-9e3b62dd02c25d59.2j047qgu8yj7k2nx.rcgu.o)
          ld: symbol(s) not found for architecture x86_64
          clang: error: linker command failed with exit code 1 (use -v to see invocation)


error: could not compile `raw_sync` due to previous error
c@macmini ~/D/r/raw_sync-rs (master) [101]>
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