I'm not sure if this has been brought up before, but there is error with the XFree86-devel package on CentOS3.

Both gccmakedep and xft-config are broken symlinks to archexec in the folder /usr/X11R6/bin.

Is there another RPM that provides archexec?

This is not a problem on CentOS4. It does look like RHEL suffers from the same problem.