http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43085
--- Comment #12 from Sylvia <fierevere at ya dot ru> 2010-10-13 15:10:34 UTC --- (In reply to comment #8) Artem, did you tried to make concurrent build ( make -j2 or anything more than -j1 ) ? there shouldnt be any collisions when building with single task (make -j1) Does adding "-Wcoverage-mismatch -fprofile-correction" flags help the issue?