Hi, Nathalie!
you wrote:
I manage to install a pascal compiler with "gpc-19990118-2rh6_i386(1).rpm... But, at first, when I did the command: $gpc -o test test.p, it says ld : cannot open crt1.o : no file or directory of this type. [...]
It seems as if some important libraries were missing on your system. They obviously were not in gpc-19990118-2rh6_i386(1).rpm.
Please install the C compiler for your system from a file of the type gcc-something-XrhY_i386(1).rpm. This package will either contain the needed libraries or have a dependency that will tell you what else has to be installed. (The same dependency should then be added to gpc-19990118-2rh6_i386(1).rpm.)
Hope this helps,
Peter