I ran autoconf 2.61 ( installed from a Red Hat rpm autoconf-2.61-8.fc7) in
cyrus-imapd-2.3.9 ( the configure included in the distribution failed, and is
7+ years old).
The resulting configure failed with:
checking build system type... Invalid configuration `x86_64-unknown-linux-gnu':
machine `x86_64-unknown' not recognized
configure: error: /bin/sh ./config.sub x86_64-unknown-linux-gnu failed
Curiously, copying configure, config.guess, and config.rpath from
courier-0.58.0 does seem to work.
Please let me know if sending you any particular files would be useful, and
thanks for all of your work in creating and promoting open source
software.
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