http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50191
--- Comment #5 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-08-29 13:45:36 UTC --- Jakub, I don't see -fprofile-generate in your list of options. What Peter gave you was the link command that exposed the problem, but the error occurred when compiling chgpen.fppized.f with the options given. The original options from the build log were: /home/wschmidt/gcc/install/gcc-mainline-base/bin/gfortran -c -o chgpen.fppized.o -fprofile-generate -g -save-temps=obj -ffast-math -O3 -mveclibabi=mass -mcpu=power7 -mrecip=rsqrt -fpeel-loops -funroll-loops -ftree-vectorize -fvect-cost-model -O3 -mvsx -maltivec -mpopcntd -m64 -ftree-loop-linear chgpen.fppized.f which, after -v, I was able to whittle down to: /home/wschmidt/gcc/install/gcc-mainline-base/libexec/gcc/powerpc64-linux/4.7.0/f951 chgpen.fppized.f -g -O3 -fprofile-generate -ffast-math -funroll-loops -o chgpen.fppized.s I should have left -mcpu=power7 and -m64 on there for you; sorry about that. Try: /home/wschmidt/gcc/install/gcc-mainline-base/libexec/gcc/powerpc64-linux/4.7.0/f951 chgpen.fppized.f -g -O3 -fprofile-generate -ffast-math -funroll-loops -mcpu=power7 -m64 -o chgpen.fppized.s Thanks! Sorry for the late response, I was out ill on Friday/Saturday.