problems During installation of 7.0.3

I tried to install rel 7.0.3 on RH Linux. The command "gmake install" failed after creating lib and bin directories. I tried to go thru the script files. and found three variables ($LIBDIR) , ($BINDIR) & ($INCLUDEDIR) in the Gmakefile.
I Could not find definition for ($INCLUDEDIR) anywhere. instead I found $HEADERDIR
So I substituted ($INCLUDEDIR) with $HEADERDIR and it created /usr/local/pgsql/bin, /usr/local/pgsql/lib & /usr/local/pgsql/include

But the script failed again. I do not want to experiment further. Can somebody help me

Rajagopal S. Iyer