"Good Gcc is not a good graphical configuration tool? If the answer is no, then I want to rebuild after three fedora is used for the i686 RPMS /usr/lib/rpm/macros Then modified the arch and optflags : %_arch I686 amended as follows : %optflags O2 g -pipe -fprefetch-loop-arrays However, the revised rebuild after the remains from beginning for the i386 RPMS. How to solve?