Speed up autoconf/configure of large project?

You can cache results between multiple configure (several runs of the same configure or recursive sub configure ) using the configure cache feature Simply run.

You can cache results between multiple configure (several runs of the same configure, or recursive sub-configure) using the configure cache feature. Simply run . /configure -C However you should remember to delete the cache when your system's configuration changes (like after installing new packages that were not found by a previous configure run).

If you use some third-party macros, you may also have to fix some of them to cache their results properly (a common error is to make some configuration decision during a test that might be skipped if the result of that test is cached). If you want to share your cache between multiple projects, you can set it up in config.site.

2 Agreed on just about all counts, but setting cache variables in config. Site strikes me as a Bad Idea. Didn't gentoo try a confcache a few years back?

IIRC, they had to back it out because it broke heaps of things. – Jack Kelly Jul 15 at 10:35.

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