------- Comment #4 from wilson at gcc dot gnu dot org 2007-11-16 22:37 ------- This problem occurs if you accidentally run ../gcc/gcc/configure instead of ../gcc/configure
I've tried looking at make -d output, and there isn't enough info there to see what is going wrong. In the second case, the implicit rule build/gen%$(build_exeext) is found. If the first case, the implicit rule is not found, and hence we perform no action when making build/genmodes, resulting in a non-existent file when we later try to run it. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34126
