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Re: configure speedup proposal: add --assume-c99 and --assume-posix2008

From: Paul Eggert
Subject: Re: configure speedup proposal: add --assume-c99 and --assume-posix2008 flags
Date: Fri, 06 Jun 2014 09:06:28 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

Rhys Ulerich wrote:

Is there some reason configure caches are unsuitable to
gain speedup there?

I regularly build with experimental versions in which the 'configure' tests themselves differ from run to run, and where configure caches would give me incorrect results. So I never use caches.

I have to wait for an unreasonably long period of time whenever I change anything that requires reconfiguration, and this happens quite frequently to me (often several times per day).

one just 35 seconds long.

It's a 35-second wait in an edit-build-run cycle, and that's wayy too long. I typically give up and work on something else for a while. The mental context-switching overhead is extremely annoying.

I would greatly appreciate it if 'configure' ran faster.

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