The following bug has been logged online:

Bug reference: 1489
Logged by: rob delong
Email address: radelong (AT) delongview (DOT) com
PostgreSQL version: 8.0.1
Operating system: RH 9
Description: configure confusion
Details:

Not really a bug, but it confused me for a bit. Thought you might want to
know.

On RH 9, configure using --with-openssl failed with ssl.h not found or
useable even though it was there. Turns out openssl as installed by the RH
installation is compiled with kerberos support. ssl.h includes kssl.h which
includes krb5.h. The last is stuffed into /usr/kerberos/include if you let
the RH installer do its thing.

Configure does not check /usr/kerberos/include for headers unless you tell
it.

If you add --with-includes=/usr/kerberos/include configure is happy.

BTW messages from configure were misleading, looked like it couldn't find
ssl.h, but inspection of config.log showed the actual error.

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