On Sat, Feb 2, 2013 at 6:47 PM, Derek Gaston <friedmud@gmail.com> wrote:
What are you changing?  If you're changing something in an m4 file then you will see a lot of diffs.  If you're adding a new file there will be some diffs but they're not bad.  If you're not doing either one of those things there should be no diffs.

I changed nothing at all, but there are 20000 lines changed when I run ./bootstrap, presumably because my autotools are newer than yours.

It doesn't affect me much: I usually only make compatibility updates to the PETSc interface and I know how to use legacy autotools if need be, but this expectation of homogeneity does somewhat increase the effort required to contribute.