Following http://gcc.gnu.org/ml/gcc/2007-08/msg00544.html I have updated to revision 128003 and tried 'make bootstrap', then 'configure' + 'make bootstrap' without success (the same kind of failure in libgcc). I the tried a fresh install: new directory, configure, and make, and it worked. So now I have a few questions:
(1) is there a simpler (cheaper) way to solve this kind of problems (deleting some files, directories, ...)? (2) is there a way to detect this kind of problem from the update result? Thanks for the help. Dominique