Linking fails on MacOSX (missing -luuid)

[hrydgard]

I'm trying (in a non-embark-related side project) to use this from a build.rs on a Macbook Air M1, but any use of hassle-rs causes a linker error about a missing -luuid when trying to build the build.rs:

error: linking with cc failed: exit status: 1
|
= note: "cc" "-arch" "arm64" "/Users/hrydg/dev/rgb/target/debug/build/rgb-dca230a1aa5b7e54/build_script_build-dca230a1aa5b7e54.10m9mxptggm1u1hd.rcgu.o" "/Users/hrydg/dev/rgb/target/debug/build/rgb-dca230a1aa5b7e54/build_script_build-dca230a1aa5b7e54.14wrnmxnrm9y2a17.rcgu.o" "/Users/hr

[SNIP]

libcompiler_builtins-56bb43a121401f7f.rlib" "-luuid" "-liconv" "-lSystem" "-lresolv" "-lc" "-lm" "-liconv" "-L" "/Users/hrydg/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/aarch64-apple-darwin/lib" "-o" "/Users/hrydg/dev/rgb/target/debug/build/rgb-dca230a1aa5b7e54/build_script_build-dca230a1aa5b7e54" "-Wl,-dead_strip" "-nodefaultlibs" "-undefined" "dynamic_lookup"
= note: ld: library not found for -luuid
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Basically, seems like some library that hassle depends on is trying to link with -luuid, which apparently is not a thing on Mac (libuuid is header-only, apparently).

(note: just thought it might be good to report, you probably should not give this any kind of priority, heh)

[MarijnS95]

This is the ancient com library.

There is a replacement, Microsoft's com-rs crate, and the conversion sits on the ms-com-rs branch here - that should resolve this linker error (it solves the exact same one on Android).

Unfortunately, just as I was planning to clean up and PR the conversion, Microsoft announced its windows-rs crate with COM interop, auto-generated bindings and all. To this day there is still no consensus on whether com-rs will live on and be maintained (it's still sees occasional fixes and releases), or whether it will be superseded by windows-rs which carries lots of similar code and intent. The latter situation requires a few minor changes to be carried by windows-rs to support Linux (and Mac) even if we just need some generated bindings and the COM vtable boilerplate.

[hrydgard]

Ok, well, maybe let's see how that shakes out, and I can play with the ms-com-rs branch in the meantime, thanks for letting me know about it! I think we should leave this issue open in the meantime, to make it easy to find for others potentially running into the same thing.

[expenses]

Installing ossp-uuid (brew install ossp-uuid) fixed this for me.

Looks like it's the same library.

[hrydgard]

@expenses are you on an x86 mac? On M1, installing that did not fix it for me.

[expenses]

I am, yeah.