Installing GNU Compilers for CentOS 4.x

If you are installing GNU compilers from yum for CentOS 4.x, here is the yum command to achieve it

GNU Compilers for 3.x (C, C++, Fortran 77, Java)
# yum install gcc, gcc-c++, gcc-g77, gcc-java

GNU Compilers for 4.x (C, C++, Fortran 77, Java)
# yum install gcc4, gcc4-c++, gcc4-gfortran, gcc4-java
Or
#yum install gcc4*