Today's progress on #FreeBSD #Linuxulator "userland from source" project: We have build systems! 🥳

Supported now (apart of plain #make): GNU #autotools (including #autoreconf), #cmake, #meson and #ninja!

They're all supported with their original #ports "USES", by some #bmake trickery in my new "USES=linuxsrc", fixing up just the parts that are different when building from/for the Linuxulator (like adjusting dependencies and commands to use the #Linux-native versions).

Ok, no #scons yet, didn't need it so far 🙈