Build failure with MinGW about lowdown

[Ericson2314]

I would also appreciate this. In https://github.com/NixOS/nix/blob/8e865f3aba526394ca333efe7258bd8db0050fbb/package.nix#L216 I had to drop this one dep for Nix, losing much functionality. I think Lowdown itself is quite naturally portable, being mainly pure functions, but the "bsd.lv" shared code unfortunately is not because it is checking for various features / using various headers that lowdown itself doesn't actually need.

[HuangShumin]

I found most parts of compats.c is not portable. Maybe we need a refact for this one.

[WxNzEMof]

It looks like there is a lot of platform-specific code in compats.c and configure which is actually not used by lowdown.

It seems to be inherited from the oconfigure project, which is a "configuration script for portable, OpenBSD-oriented systems". I don't know if MinGW support would be within that project's scope, but if they would consider supporting it, then maybe it could be upstreamed there.

Otherwise, perhaps lowdown might consider moving away from oconfigure, and to a more cross-platform build/configuration system, such as CMake, meson, or even GNU Autotools?