Feature: Windows support for wcc (MinGW64)

[ijsf]

I was wondering if there would be interest to make wcc natively compatible with Windows (64-bit) by using the MinGW64 toolchain using MSYS.

I've managed to successfully port wcc to MinGW64 and make it useable under Windows, as I have a need for a lightning fast C to WASM compiler and wcc seems to fit the bill 🏆

It seems that scope of the changes are more or less:

• Changed use of long (not 64-bit on Windows) to long long to explicitly use 64-bit and still allow for arithmetic.
• Platform specific utility function replacements for non-C standard functions such as fmemopen, tmpfile as well as process handling such as fork.
• Path handling that handles C:\\A\\B\\C as well as POSIX paths transparently.
• Enforce use of 32-bit wchar.

My changes are passing all test-wcc tests. I've tried to keep the changes as unintrusive as possible to avoid regression, but there are still a large number of changes.

For other targets like xcc, it seems much less logical and I have not touched any of these, namely, the compiler will produce ELF output which won't be able to run natively on Windows, unless something is added to accommodate this.

[tyfkda]

Would you send a pull request, or tell me how to solve the problem?
I am worried about code complexity with conditional compilation.

[ijsf]

Yes I understand, I guess it would be better to split up in multiple PRs to keep overview. I've contained nearly all of the conditional code to a separate util file called platform.c. I will open up a first PR for the data types.

[ijsf]

This should be the complete patchset for wcc.

[tyfkda]

After careful consideration, I would like to reject this pull request because it is difficult for me to support the MinGW64 platform.
I apologize for not being able to meet your request.

[ijsf]

I understand as the changes are quite substantial. I will focus my own fork on Win32 compatibility instead: https://github.com/ijsf/xcc-win32