https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68268
--- Comment #5 from isearcher at 126 dot com --- Hello! I create a build directory, cd to it, and execute "sources_dir/./configure ..." like this : /wk5/WJ/tmp/gcc-4.8.0/configure --prefix=/wk5/WJ/gcc -enable-threads=posix -disable-checking -disable-multilib -enable-languages=c,c++,fortran --with-gmp=/wk5/WJ/gmp-4.3.2 --with-mpfr=/wk5/WJ/mpfr-2.4.2 --with-mpc=/wk5/WJ/mpc-0.8.1 But there is a new error: make[2]: Entering directory `/wk5/WJ/gcc' make[3]: Entering directory `/wk5/WJ/gcc' rm -f stage_current make[3]: Leaving directory `/wk5/WJ/gcc' Comparing stages 2 and 3 warning: gcc/cc1plus-checksum.o differs warning: gcc/cc1-checksum.o differs Bootstrap comparison failure! gcc/plugin.o differs gcc/gcc.o differs make[2]: *** [compare] Error 1 make[2]: Leaving directory `/wk5/WJ/gcc' make[1]: *** [stage3-bubble] Error 2 make[1]: Leaving directory `/wk5/WJ/gcc' make: *** [all] Error 2 thanks.