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bug#9106: 24.0.50; ./configure causes massive recompilation
From: |
Eli Zaretskii |
Subject: |
bug#9106: 24.0.50; ./configure causes massive recompilation |
Date: |
Mon, 18 Jul 2011 21:37:02 +0300 |
> From: Glenn Morris <rgm@gnu.org>
> Cc: 9106@debbugs.gnu.org
> Date: Mon, 18 Jul 2011 13:48:45 -0400
>
> Eli Zaretskii wrote:
>
> > Invocation of the `configure' script causes recompilation of many
> > source files, even though nothing has really changed.
>
> Why do you want to re-run configure - can you get away with just `make'?
How can I know? I just did a "bzr up", and I don't want to analyze
every file that got updated to see if a mere "make" will do. E.g.,
what if some Makefile.in got updated?
It used to be the case that if the results of running `configure'
didn't change anything of essence, "make" would do nothing. This
worked by producing the generated files under temporary names and by
using move-if-change to overwrite the old files if the new ones were
different. Why cannot we extend this method to the additional files
we generate now?
> In principle, almost anything could have changed if you have re-run
> configure (?). Eg you could in principle be compiling for a different
> arch now. I'm not sure it's possible to distinguish those cases from
> cases where nothing has really changed.
Of course, it's possible: several files, such as src/config.h, will be
different. We just need to compare them before we overwrite the old
ones with new.
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/17
- bug#9106: 24.0.50; ./configure causes massive recompilation, Paul Eggert, 2011/07/19
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Paul Eggert, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Ralf Wildenhues, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Paul Eggert, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Eli Zaretskii, 2011/07/20
- bug#9106: 24.0.50; ./configure causes massive recompilation, Ralf Wildenhues, 2011/07/21