autoconf: Sharing Defaults

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1 16.8 Sharing Defaults
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1 If you want to set default values for `configure' scripts to share, you
1 can create a site shell script called `config.site' that gives default
1 values for variables like `CC', `cache_file', and `prefix'.
1 `configure' looks for `PREFIX/share/config.site' if it exists, then
1 `PREFIX/etc/config.site' if it exists.  Or, you can set the
1 `CONFIG_SITE' environment variable to the location of the site script.
1 A warning: not all `configure' scripts look for a site script.
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