Created attachment 414250 [details] build.log Hello, during update of quite an old setup I found that gcc-4.9.3 fails to build with isl-0.11.1 which is still in the tree. It build fine with isl-0.15 on the same box, so please update version requirements (probably in the toolchain.eclass).
Created attachment 414252 [details] environment
Created attachment 414254 [details] emerge --info
I'm not really sure what version requirement should be minimal, but since both gcc-4.9.3 and isl-0.12.2 are stable, you should test that version.
gcc-4.9 doesn't need this header http://sources.gentoo.org/gentoo/src/patchsets/gcc/4.9.3/gentoo/74_all_gcc49_cloog-dl.patch?r1=1.2&r2=1.3 http://gitweb.gentoo.org/repo/gentoo.git/commit/?id=e343a558fff1e4bff16aadc60bf81f92c5834dd9