https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100340
--- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> --- I am testing a patch series (expected to push a github copy today if that testing goes OK) including an implementation of comment #9. However, IFF the jit build does not honour --without-build-config, that actually seems like a different bug. I rarely build the jit, but will take a look when time permits.