https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68540
David Edelsohn <dje at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |WONTFIX --- Comment #7 from David Edelsohn <dje at gcc dot gnu.org> --- GCC Development often requires newer versions of packages than those shipped with Linux distributions. GCC now requires ISL 0.14 or 0.15 (possibly 0.13, but no one has confirmed). Also, as referenced in comment #6, earlier versions of ISL have flaws and should not be used. There are multiple reasons that ISL 0.12 should not be supported. GCC Graphite can compile and operate correctly with ISL 0.15. Please upgrade to a newer release of ISL.