feat: Add support for compiling with Microsoft Visual Studio C++ (MSVC)

[CGQAQ]

No description provided.

[saghul]

Thanks for getting this started! Any chance you can add a MSVC target to the CI so it's properly tested? Thank you!

[CGQAQ]

Sure, I'll add that later

[saghul]

Also note you can't assume MSVC always if _MSC_VER is defined. It could be Clang-CL. See the failing tests.

[CGQAQ]

Also note you can't assume MSVC always if _MSC_VER is defined. It could be Clang-CL. See the failing tests.

Yeah! I already noticed that, should check __clang__ is not defined as well

[CGQAQ]

Done, @saghul PTAL

[CGQAQ]

Seems like we have some issues on netbsd CI enviroment

[saghul]

I re-ran it and it's all good now.

[saghul]

Great work! Left some comments, please take a look!

[CGQAQ]

done

[CGQAQ]

Sorry, I clicked commit suggestion, but did not pay attention the change was wrong

[saghul]

Thank you!

[ggcrunchy]

I built this yesterday and am hoping to put it to use today.

Ran into a few things along the way. (Visual Studio 2019, C11 language, and 32-bit build with XP toolset)

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This also wanted an INF: https://github.com/quickjs-ng/quickjs/blob/6868fb9e2516fde4a7a3fcef113a6bb1e5ecc957/quickjs.c#L46698

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In Release mode, the floor and ceil lines complain about not being constant.

I found this post and with its #pragma solution resolved it.

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Owing to the 32-bit build it didn't like the _BitScanReverse64 in cutils.h, so I #ifdef'd it to use this.

Wasn't sure how you'd want to actually handle that (or the previous point) if I did a PR.

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Also when adding the newly-built library to a project it balked at the JS_NewCFunctionMagic function in quickjs.h.

I'm including it from a C++ file—default library standard, i.e. C++14—so I figured it was due to the designated initializer (there's even a suggestive comment lower down, above some macros: /* Note: c++ does not like nested designators */). Simply commenting the function out made it compile fine.

[saghul]

A PR would be most welcome!

[ggcrunchy]

Okay, cool. After I putz around with it a bit I'll get on that. 😄