MinGW support

[SchrodingerZhu]

Currently, the project does not support MinGW.
With the following changes, it can compile with MinGW:

1. CmakeLists.txt: at about line 74, add a branch AMD64 (quite strange but 'amd64' does not work).
2. pal_windows.h: add some macros

   #  ifndef _MSC_VER
   #  include <cstdio>
   #  endif
   #  ifndef NOMINMAX
   #  define NOMIXMAX
   #  endif

3. test/usage.h

    #  ifndef NOMINMAX
    #  define NOMIXMAX
    #  endif

The project compiles but all test fails. Is there any plan to improve the support?

[SchrodingerZhu]

with Release profile, I run into another error:

allostats.h: array subscript 36 is above bounds of 'snmalloc::AllocStats<59, 28>::Stats [28]'

[mjp41]

Thanks for pointing this out. We don't have plans to add support for MinGW, but I am happy to review patches, and take an additional CI process to maintain it.

[SchrodingerZhu]

I think I have made it to work with some small changes. PR will be opened soon.

[SchrodingerZhu]

#137 provides a possible fix