Make macOS static libraries thin for linking

[KoviRobi]

This just used

lipo libftd2xx.a -thin x86_64 -output x86_64/libftd2xx.a
lipo libftd2xx.a -thin arm64 -output arm64/libftd2xx.a

See rust-lang/cargo#8875 (comment)

[KoviRobi]

Looks like this might be fixed in the future rust-lang/rust#55235

[newAM]

Thanks!

Would it be possible to generate these in the build.rs script? That makes it easier to maintain when the vendor libraries update. As far as I know it is impossible to cross-compile this for an Apple target from Windows or Linux; I don't think it would cause anything to break to assume that the compilation host will have the Apple developer tools installed.

Also, just to make sure I read those issues correctly, this solves an error that appears when trying to compile into a rust library?

[KoviRobi]

Yeah good point, it should be possible to compile at build time, I'll have to look into it maybe over the weekend. But also, there is llvm-lipo, though I haven't figured out how to link to macOS yet -- though somehow zig manages it. And yeah the crate builds fine , it's at the final linking step you have this problem.