Problem in bootstrapping on mingw

[FX]

> This is a known issue and related to timestamps of those generated
> .texi files. By touching generated .texi it can be solved. This test
> in make is here a bit broken IMHO, as a content check would satisfy
> needs for validity-check alone.

I'm wondering about this part of the Makefile:

        elif test $(srcdir)/doc/tm.texi -nt $(srcdir)/doc/tm.texi.in \
          && test $(srcdir)/doc/tm.texi -nt $(srcdir)/doc/target.def; then \

because I don't think I have a $(srcdir)/doc/target.def, but $(srcdir)/target.def