I am not sure this is the good way to do this, but...
Index: ChangeLog from Benoît Perrot benoit@lrde.epita.fr
* bootstrap: Update the time stamp of reference output files to avoid them to be illegitimately regenerated when checked out from the repository.
2004-10-31 Benoît Perrot benoit@lrde.epita.fr
Index: bootstrap --- bootstrap (revision 144) +++ bootstrap (revision 145) @@ -4,4 +4,7 @@ cd src/inst ../../dev/inst-nodes-mk-gen.py < ../../dev/nolimips.xml > nodes.mk cd $here + +find tests -name '*.ref' -exec touch '{}' ';' + autoreconf -f -v -i -m