On Mon, 25 Jan 2021, Peter Johansson wrote:
Hi Bob,
On 24/1/21 10:06 am, Bob Friesenhahn wrote:
I did try this type of solution. As I recall, it did not help because the
terminal target is Automake's regeneration rules, which are apparently
optimized to not modify the target files (e.g. configure) if there was no
change.
This seems like a very annoying optimization. IIUC, that means if I'd touch
the timestamp of 'configure.ac' without changing its content, I'd end up in
this hole of 'configure.ac' being newer than 'configure' but 'configure' not
being updated. That doesn't seem to be the case in one of my projects. If I
just 'touch configure.ac && make' all downstream files are updated as
expected (except 'config.h', which is a known behavior), so I suspect you
have something else going with the dependencies. Impossible to guess what
without seeing the relevant Makefile snippet.
The key part of the simplified solution is (was) this:
AC_SUBST([CONFIGURE_DEPENDENCIES],["$CONFIGURE_DEPENDENCIES \$(top_srcdir)/ChangeLog
\$(top_srcdir)/version.sh"])
Although these are declared as "dependencies", if one of them changed
it did not necessarily result in configure being updated. If the
information provided to AC_INIT was the same as before it did not seem
to result in configure being updated.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
Public Key, http://www.simplesystems.org/users/bfriesen/public-key.txt
