Compile Linux binaries with Zig

[bjia56]

Resolves #37

All Linux builds are now run on the stock ubuntu-latest GH Actions runners, cross-compiling if necessary. Zig's ability to target glibc 2.17 is used to ensure we comply with manylinux2014.

The arm build has also been tweaked to target the Raspberry Pi 1 armv6 configuration instead of armv7l. This resolves the illegal instruction issue discovered in lexiforest/curl_cffi#192.

[perklet]

Sounds cool, are there any potential performance downsides?

[perklet]

Is it possible to support musl linux with zig cc? #5

[bjia56]

I haven't done any profiling myself, but since zig uses clang, I would expect the results to be properly optimized and not significantly different than gcc.

Zig can also link against musl libc. An interesting writeup here: https://andrewkelley.me/post/zig-cc-powerful-drop-in-replacement-gcc-clang.html

[perklet]

I came across that post, too. It would be great to have musl libc binaries out of the box. It seems that we just need to ensure that CFLAGS like -O3 are passed correctly, then there will be no issue to worry about.

[bjia56]

I can take a look at compiling against musl

[perklet]

I can take a look at compiling against musl

Do you want to continue work on this branch or a new PR?

[perklet]

zig is awesome, this should be able to close #17 for Linux 32bit build, too.

[bjia56]

I can take a look at compiling against musl

Do you want to continue work on this branch or a new PR?

Probably a separate PR if that's ok with you