On Fri, Apr 5, 2019 at 12:55 PM Martin Sebor <mse...@gmail.com> wrote: > > Is it safe to rerun make bootstrap after changing GCC source? > > Say if the first bootstrap succeeds and I then change a single > GCC .c file and rerun make bootstrap, am I guaranteed to see > the same fallout of the change as I would if I did a pristine > build in a clean directory? > > I have been assuming this is safe and so after each tweak to > a patch I work on I rerun make bootstrap in the same build > directory. It can speed things up quite a bit. > > But the recent bootstrap breakage (PR 89980) makes me wonder > if it is, in fact, safe. I can see the broken bootstrap today > in a clean build yet the bootstrap I did just before checking > in the change went fine. >
You need to do a clean bootstrap. -- H.J.
