Re: [libvirt] [PATCH 3/2] build: automate the rerun of autogen.sh

Automate the reuse of autogen.sh, rather than just erroring out. * cfg.mk (_update_required): Run autogen.sh, rather than just warning about it. (_autogen): New target. --- > > Hmm, as long as make is smart enough to warn, and now that running > > ./autogen.sh with no arguments is reliable at maintaining an > > existing setup, I could even submit a followup patch to have make > > blindly run ./autogen.sh instead of dying with the error that the > > user has to run it. Any interest in such a followup? > > I have a slight preference for automating it. > > The current failure+instructions do serve to tell the user that something > unusual (and time-consuming) is about to happen, but it's easy > to print a warning to that effect while automating the job. This automates it. It took me a while to figure out how to cause the automation without losing output - the idea in GNUmakefile of using a $(shell) to do a recursive make is not too good, because stdout is consumed and the user can't see any progress. But the trick of adding a dependency on Makefile works nicely, so maybe I should rewrite GNUmakefile upstream in gnulib to use the same trick.

To test the patch, I temporarily added a newline to bootstrap.conf, then ran 'make' twice; autogen.sh reran only on the first run of the two. (Of course, reverting the temporary newline caused autogen.sh to rerun again - you can save yourselves that hassle by saving off .git-module-status before you test, and restoring it back when you revert bootstrap.conf back to normal).

- $(error gnulib update required; run ./autogen.sh first) + $(info INFO: gnulib update required; running ./autogen.sh first) +Makefile: _autogen endif endif +.PHONY: _autogen +_autogen: + $(srcdir)/autogen.sh + # Exempt @...@ uses of these symbols. _makefile_at_at_check_exceptions = ' && !/(SCHEMA|SYSCONF)DIR/'