FFI backend doesn't work on Windows

[mbudnek]

FFI backend doesn't work on Windows

[koraktor]

Looks like I’m unable to reproduce this. Can you give some detail about your setup (Windows, Ruby, bzip2 versions)?

[mbudnek]

I'm using Ruby 2.2.5 32-bit from rubyinstaller.org, bzip2 1.0.6 built with Visual Studio 2010, FFI 1.9.18, and rbzip2 0.3.0.

I expect any version of Visual Studio will have this problem. You can see where bzip2 defines BZ_API(func) to WINAPI func (WINAPI being a macro that expands to __stdcall) on line 85 of bzlib.h. If you're building bzip2 with MinGW or similar then _WIN32 may not be defined, in which case the API will use the cdecl convention.