Consider versioning pkg-config and headers
Right now, headers and pkg-config are installed to /usr/lib/pkg-config/wlroots.pc
and /usr/include/wlr/
. This makes it a bit difficult for distros to allow parallel installations of wlroots development files: they need to manually patch the installed files and the compositors to use a subdir, e.g. /usr/lib/pkg-config/wlroots-0.17.pc
and /usr/include/wlroots-0.17/wlr/
.