Comment #5 on issue 2513 by [email protected]: Patch: Build: add -fno-tree-vrp to CXXFLAGS for gcc 4.7.0
http://code.google.com/p/lilypond/issues/detail?id=2513
I have tested each individual "-fno-*" option with "-O2". The only other option to fix the error message ("moving backwards in time") without breaking compilation is "-fno-inline", but that would be even more radical than "-fno-tree-vrp".
