add Dub support

[kassane]

closes #2

Reference

• https://dub.pm/dub-reference/recipe/

[kassane]

dub not linking dll libraries, only *.lib|**.a? (zig build -DShared - build sokol.dll)
see: https://github.com/kassane/sokol-d/actions/runs/7686938821/job/20946392177?pr=12#step:6:40

CI - Windows error:

dub build :clear
    Starting Performing "debug" build using C:\hostedtoolcache\windows\dc\ldc2-cbdce51f\x64\ldc2-cbdce51f-windows-multilib\bin\ldc2.exe for x86_64.
    Building sokol-d:clear 0.1.0: building configuration [application]
   Pre-build Running commands
Error: unrecognized file extension dll
Error: unrecognized file extension dll
Error: unrecognized file extension dll
Error: unrecognized file extension dll

I need help, about Windows linking using (re)dub. Because zig provides own linker in all targets, but dub (pkg-manager) not.

cc: @MrcSnm, @ryuukk

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Edit

The bug isn't in the dub, maybe in the zig. I need on windows to check and fix this.

[kassane]

The bug isn't in the dub, maybe in the zig. I need on windows to check and fix this.

Yes and no!
zig build -Dshared also run ldc2 building all examples, no library only. This error is issued by ldc2 which does not recognize dll extension. However, the zig generated without any problem.

[kassane]

Note: Needed to switch setup-zig because caching was missing, was making the zig installation longer.

-     - uses: goto-bus-stop/setup-zig@v2
+     - uses: korandoru/setup-zig@v1
+       with:
+         zig-version: master

[kassane]

Latest commit, get another errors using implib (sokol.lib defined from dll).

https://github.com/kassane/sokol-d/actions/runs/7688266248/job/20949282160#step:6:1

ldc/ldmd2, Windows support is 😖🔫!!

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Edit

Maybe, I need to port all libsokol dependencies listed in build.zig to dub.sdl when getting the static library. Possibly identifying all reference links.