Please allow to use the external libfixmath

[yurivict]

Many systems libfixmath packages: have https://repology.org/project/libfixmath/versions

Please allow to use them instead of downloading libfixmath.

[MikeLankamp]

Hi @yurivict, I'm afraid I don't understand your request. Repology seems to track which distributions provide which version of libfixmath. What do you expect fpm to do with that?

[yurivict]

Repology shows systems having packages for libfixmath.

Why do you need to download libfixmath if external packages exist?

[MikeLankamp]

I see. fpm downloads it because Windows/OS X doesn't have it, and fpm supports those platforms, too. But most importantly: I need to make sure it's compiled with specific flags to ensure a fair comparison with fpm in the accuracy benchmarks.