[Users] Installing Open Ser Fedora Core 4

Hi, I'm installing Openser on a Fedora Core 4 on my local machine, I got pass the point where you remove mysql from the string from the exclude_moudule. When type in make all, I get the following errors [root@localhost sip-server]# make all /bin/sh: gcc: command not found /bin/sh: gcc: command not found /bin/sh: gcc: command not found Makefile.defs:243: Unknown compiler gcc; supported compilers: gcc, sun cc, intel icc Makefile.defs:517: You are using an old and unsupported gcc version (unknown), compile at your own risk! bison -d -b cfg cfg.y make: bison: Command not found make: *** [cfg.tab.c] Error 127 Any ideas how to fix it. Thanks.