[bug-gettext] po-gram-gen2.h: No such file or directory

[Earnestly]

Hi, I'm attempting to build really only msgfmt for temporary system.

The catch is that I'm pulling gettext from git instead of using a
packaged release.

I'm configuring the main gettext directory with ./autogen.sh in order to
configure the gettext-tools directory.

    [Is there any way to configure only enough to build msgfmt without
    configuring all of gettext?]

This seems to go well but when running ./configure in gettext-tools and
make -C gnulib-lib and make -C src msgfmt I get the following error:

    po-lex.c:52:26: fatal error: po-gram-gen2.h: No such file or directory
     #include "po-gram-gen2.h"
                              ^
    compilation terminated.

I've tried building with exported MAKEFLAGS=j1 and make -j1 but neither
seem to help; this was prompted by reading about parallel make issues
involving po-gram-gen2.h.

At this point I don't know what to do, the goal is to create msgfmt
which will be used for building the rest of the system.