William Hue writes:
I don't know about the latest version, but older versions of Courier's configure default cache_file to ./config.cache in the top-level directory. configure scripts in the subdirectories get passed --cache-file with a relative path (e.g. --cache-file=.././config.cache) and do load the cache properly. Perhaps the cache-file processing in the latest release's configure scripts is broken?
No. Cache file processing is turned off by default in the current version of autoconf. The reason given:
By default, `configure' uses no cache file (technically, it uses `--cache-file=/dev/null'), to avoid problems caused by accidental use of stale cache files.
Investigating what needs to be done to work around this.
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