Hi I am trying to install Geant4 but it is creating a few problems. I have Scientific Linux 6.3. I think that things like gcc, make and Cmake should be already installed, but when I run the cmake command I get an error saying that no cmake has been found. When I try to install Cmake using ./configure the system says that no C compiler has been found. To install gcc I think I also need make and when I run ./configure I get the following message: checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking for gcc... no checking for cc... no checking for cl.exe... no configure: error: in `/home/John/Downloads/make-3.82': configure: error: no acceptable C compiler found in $PATH See `config.log' for more details. How do I fix my Cmake and C compiler? I was told that when installing SL6.3 that I should choose the option "Programming and Development" but I didn't see any option when installing the OS. Thank You