Quite a few patches labored on for Haiku OS again for Mesa 20.x had been freshened up and with some further tweaking and code cleansing these patches have now been merged for Mesa 21.0. This contains factoring out a number of the OpenGL legacy dispatch code and a number of cleanups across the Softpipe driver dealing with.
With Mesa 21.0-devel as of right now, it’s a minimum of sufficient the place Mesa Git can now be constructed on Haiku OS and yield working OpenGL rendering with the LLVMpipe software program.
Neat, and a testomony to Haiku being in a much better state than many individuals appear to suppose.