Fix various windows build issues

[e9925248]

No description provided.

[mseeber]

Would it bring any improvement to read the target platform (32 or 64 bit) from env['DEST_CPU'] instead of running the compiler and checking for the macro?

[e9925248]

The current check is aligned with with the DLL name selection of the Jack code.

Considering 32+64 bit x86 only, checking DEST_CPU should work with GCC (Mingw) and Intel Compilers. I can't spot any DEST_CPU support with other compiler in waf - nor any 32/64 bit distinction via DEST_CPU for non Intel architectures.

In the long term, in my option, the hardcoded filenames in the code should go away and the build system should inject the generated library names.

[mseeber]

Ah, ok, I'm just not that familiar with waf, that's why I asked.

[karllinden]

I think you will have to redo the PortAudio-fix commit since the build system has changed since you opened this PR. But otherwise the PortAudio-fix looks correct.

[adiknoth]

If you still care about this PR, please update to current master and then ping the thread, so that we can merge shortly after.