/lib/cpp

["Frank Salter" <FrankMSalter blueyonder co uk>]

I am using Slackware 10 and gcc 3.4.1.  When compiling dia-0.94 from source
it required /lib/cpp as the C pre-processor.  A symbolic link to
/usr/local/bin/cpp resolved the difficulty!
However /lib and /usr/local/bin are located on different drives, and I try
to avoid linking across drives as it appears to be bad practise.  I believe
that Slackware provides a highly standardised organisation and its manifest
shows NO file /lib/cpp.
I have previously compiled early versions of dia and I can not remember
having to create such a symbolic link, but I am unable to say that /lib/cpp
did not exist in my distribution.
cpp appears to be a strange thing to find in a library.  Is this intentional
or is it an error?
Regards  Frank Salter