[CentOS] Problem with rpmbuild

I want to be able to recompile php, so I downloaded the src dvd and did a

rpm -i php-4.3.9-3.15.src.rpm

After doing that I wanted to check to see if I can recompile it before 
making changes.  So, I went to the SPECS dir and did a

rpmbuild -i php.spec

It spent a lot of time doing the compile, but at the end there were errors.

What am I missing?

Todd

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