Problem Compiling WRF4.2 - real.exe

I am following the UCAR tutorial trying to compile WRF V4.2, but when reaching the step of compiling the "real.exe" program, I get error(s) and the .exe files do not get generated.

I've attached the log.compile file for reference.

Please note I'm very new to UNIX and WRF, so any simplified solutions would be really appreciated.

Thank you.

Please type ./clean -a in top WRF directory, then type ./configure and select the dmpar mode to compile the code. Please save the complete log file for me to take a look.

I followed your instructions and ran ./clean -a, then ./configure, and the resulting log.compile file is attached.

Still having errors in compiling the real case.

Thank you very much in advance for your time in helping with this.

Your log file shows the following error:/lib/cpp: not found
CPP is the language preprocessor, which should be automatically used by your compiler.
Please talk to your computer manager about this issue.