https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61792
--- Comment #6 from Manfred Schwarb <manfred99 at gmx dot ch> --- There is ./configure --disable-isl-version-check, but I doubt that it will help. The thing is, isl-0.13 needs cloog-0.18.2 (or rather, cloog-0.18.1 needs isl-0.12.2 and does not build with isl-0.13), which is not yet released. Now I heard that the goal is to do without cloog, but I guess the configure machinery (and probably, the rest of the graphite code) is not yet up to it. There really needs an immediate solution to this issue, I think ATM there is no way to build graphite without resorting to non-released libraries. I suggest to revert all these isl-0.13 dependencies until cloog-0.18.2 is released, or there is shown some way to build graphite without cloog. Roman, how is one supposed to build GCC with graphite support?