Make and make install - Clearsilver

Hi all

my name is Ruben. Im trying to setup a Linux Centos distro with Trac but
now im having problems with ClearSilver installation.

My linux is setup from 0 and there are a only a few software installed:
Yum, Python,Sqlite and 2 o 3 more so this machine is almost empty.These
programas was installated by RPM . There aren't Apache, Mysql o PHP
installed yet.

1.- I tried to install ClearSilver with python mode:

./configure --with-python=/usr/bin/python

2.- But when i execute the "make" compiler i see a lot of errors :/

Failed Regression Test: test_numbers.cs
   See test_numbers.cs.out and test_numbers.cs.err
/bin/sh: diff: command not found
/bin/sh: diff: command not found
Failed Regression Test: test_splice.cs
   See test_splice.cs.out and test_splice.cs.err
/bin/sh: diff: command not found
/bin/sh: diff: command not found
Failed Regression Test: test_joo.cs
   See test_joo.cs.out and test_joo.cs.err
/bin/sh: diff: command not found
/bin/sh: diff: command not found
Failed Regression Test: test_first_last.cs
   See test_first_last.cs.out and test_first_last.cs.err
/bin/sh: diff: command not found
/bin/sh: diff: command not found

.....

Then i tried to do a make install i see a lot of a errors again. i don't
know if Clear Silver is installed well or not and where. Its my first
time to install ClearSilver. I need some help here :( I read the INSTALL
txt to find some help but i only see the normal instructions:
./configure, make, etc.

Any help will be appreciated.

Thanks a lot.