We needed to restore .la and static libs recently for bug 766051 (Ragel was critically broken on big endian arches, unable to build high-profile packages).
CMake ports are available for Ragel and Colm, so that should help with .la. To be seen if we ca undo much about static libraries, although given they're almost always bumped in tandem, this isn't a *huge* issue.
Note that ragel is the only reverse dependency of colm.
This bug is to try ditch .la and static linking against Colm in Ragel if possible, but I'm more optimistic about the former given how tightly integrated they are.
*** Bug 766716 has been marked as a duplicate of this bug. ***