http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53918
utke at mcs dot anl.gov changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |utke at mcs dot anl.gov --- Comment #2 from utke at mcs dot anl.gov 2012-09-25 14:35:34 UTC --- for v 4.7.2 I went with the prerequisites cloog 0.17.0 on the prerequisites page but when configuring gcc it would by default insist on the PPL backend unless I specify --enable-cloog-backend=isl and then, with that configure would insist on version 0.16.x with the test: #if CLOOG_VERSION_MAJOR != 0 || CLOOG_VERSION_MINOR != 16 || CLOOG_VERSION_REVISION < 1 | choke me | #endif and so I also have to --disable-cloog-version-check So the either the prerequisites page is wrong or the configure.