Compile fail with MinGW-w64 on Windows

I got this error:

IlmImf/ImfSystemSpecific.h: In function 'void* Imf_2_1::EXRAllocAligned(size_t,
size_t)':
IlmImf/ImfSystemSpecific.h:64:41: error: 'posix_memalign' was not declared in th
is scope
     posix_memalign(&ptr, alignment, size);
                                         ^

There's #ifdef __GNUC__ in code which enables that part, it should be #if defined(__GNUC__) && !defined(__MINGW32__)