Zig CC cross-compilation support for Windows on Linux host.

[svladykin]

Was able to cross-compile everything on Linux for Windows with Zig. Some minor cleanup was needed.

It would be great to add a CI check for that. Here is the script:

export ZIG=zig-linux-x86_64-0.12.0-dev.1834+f36ac227b
rm -rf build && mkdir build && cd build
curl -o zig.tar.xz "https://ziglang.org/builds/$ZIG.tar.xz"
tar -xf zig.tar.xz
export CC="$(pwd)/$ZIG/zig cc -target x86_64-windows"
cmake -DCMAKE_SYSTEM_NAME=Windows ..
make

[codecov[bot]]

Codecov Report

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Comparison is base (c729344) 99.81% compared to head (6d2af7e) 99.81%.

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[tezc]

To add it to CI, we should setup Linux for Windows first right? If you already know how to do it, you can add a job to windows.yml. Otherwise, let's handle it later.

[svladykin]

It actually can be executed on any Linux. Let me try to add it to .ubuntu.yml.

[svladykin]

Checked the build log for x64-ubuntu / Zig Windows, it works as expected.

[tezc]

thank you