--gnits, AC_INIT and VERSION

[Robert Collins]

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There was discussion about getting version numbers from VCS recently;
I've done a slightly different thing for a while now:
AC_DEFUN([SUBUNIT_MAJOR_VERSION], [0])
AC_DEFUN([SUBUNIT_MINOR_VERSION], [0])
AC_DEFUN([SUBUNIT_MICRO_VERSION], [2])
AC_DEFUN([SUBUNIT_VERSION],
[SUBUNIT_MAJOR_VERSION.SUBUNIT_MINOR_VERSION.SUBUNIT_MICRO_VERSION])
AC_PREREQ([2.59])
AC_INIT([subunit], [SUBUNIT_VERSION], [contact...])
AC_SUBST([SUBUNIT_MAJOR_VERSION]) ...

This works well, until gnits is added to AM_INIT_AUTOMAKE.

It looks like it expects a literal, not a macro in AC_INIT ?

It seems to me that for gnits to work with dynamic (whether from VCS or
otherwise) version numbers, it would need to actually get the expanded
form, or perhaps more sensibly provide a configure time check that the
version calculation *results* in a good version.

Something like:

all: am-version-check
.PHONY: am-version-check

am-version-check::
        <logic here>

- -Rob

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