following is the problem that I faced during the installation process of gcc-3.0.4
the steps I followed >>

* gunzip and tar -xf al gcc-3.0.4*.tar.gz files
* mkdir gcc-build;cd gcc-build
*then the following problem occured......

ot@localhost gcc-build]# /usr/gcc/gcc-3.0.4/configure --prefix=/opt-program-suffix=-3.0.4
Configuring for a i686-pc-linux-gnu host.
Created "Makefile" in /usr/gcc/gcc-build using "mt-frag"
/tmp/cNf3807/cNf3807.pos: line 7: cc: command not found
*** The command 'cc -o conftest -g conftest.c' failed.
*** You must set the environment variable CC to a working compiler.


prior to this we got these results

[root@localhost ~]# which gcc
/usr/bin/which: no gcc in (/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/libexec/gcc/i386-redhat-linux/3.4.3:/usr/java/jdk1.6.0_16/bin:/usr/apache-ant-1.7.1/bin:/root/bin)


[root@localhost ~]# set
ANT_HOME=/usr/apache-ant-1.7.1
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="00" [2]="15" [3]="1" [4]="release" [5]="i386-redhat-linux-gnu")
BASH_VERSION='3.00.15(1)-release'
CC=gcc
COLORS=/etc/DIR_COLORS.xterm
COLORTERM=gnome-terminal
COLUMNS=80
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-9An1DiKmNp
DESKTOP_SESSION=default
DIRSTACK=()
DISPLAY=:0.0
EUID=0
GDMSESSION=default
GNOME_DESKTOP_SESSION_ID=Default
GNOME_KEYRING_SOCKET=/tmp/keyring-kLC8m2/socket
GROUPS=()
GTK_RC_FILES=/etc/gtk/gtkrc:/root/.gtkrc-1.2-gnome2
G_BROKEN_FILENAMES=1
HISTFILE=/root/.bash_history
HISTFILESIZE=1000
HISTSIZE=1000
HOME=/root
HOSTNAME=localhost.localdomain
HOSTTYPE=i386
IFS=$' \t\n'
INPUTRC=/etc/inputrc
JAVA_HOME=/usr/java/jdk1.6.0_16
KDEDIR=/usr
LANG=en_US.UTF-8
LESSOPEN='|/usr/bin/lesspipe.sh %s'
LINES=24
LOGNAME=root
LS_COLORS='no=00:fi=00:di=00;34:ln=00;36i=40;33:so=00;35:bd=40;33;01:cd=40;33;01r=01;05;37;41:mi =01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:*.bat=00;32:*.sh=00;32:*.csh=0 0;32:*.tar=00;31:*.tgz=00;31:*.arj=00;31:*.taz=00;31:*.lzh=00;31:*.zip=00;31:*.z=00;31:*.Z=00;31:*.g z=00;31:*.bz2=00;31:*.bz=00;31:*.tz=00;31:*.rpm=00;31:*.cpio=00;31:*.jpg=00;35:*.gif=00;35:*.bmp=00; 35:*.xbm=00;35:*.xpm=00;35:*.png=00;35:*.tif=00;35:'
MACHTYPE=i386-redhat-linux-gnu
MAIL=/var/spool/mail/root
MAILCHECK=60
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/libexec/gcc/i386-redhat-linux/3.4.3:/usr/java/jdk1.6.0_16/bin:/usr/apache-ant-1.7.1/bin:/root/bin
PIPESTATUS=([0]="0" [1]="0")
PPID=3757
PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}\007"'
PS1='[\u@\h \W]\$ '
PS2='> '
PS4='+ '
PWD=/root
RHINO_HOME=/usr/RhinoSDK
SESSION_MANAGER=local/localhost.localdomain:/tmp/.ICE-unix/3814
SHELL=/bin/bash
SHELLOPTS=braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor
SHLVL=2
SSH_AGENT_PID=3844
SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass
SSH_AUTH_SOCK=/tmp/ssh-MfaKTe3843/agent.3843
SUPPORTED=en_US.UTF-8:en_US:en
TERM=xterm
UID=0
USER=root
WINDOWID=35660772
XAUTHORITY=/root/.Xauthority
_
to my knowledge there is a previous version of gcc is installed in /usr/libexec/i386-......
so I set the environmental variable for the new gcc and don't know whether it has been correctly set .The above command would display all my efforts in setting up environmental variable and the following I tried after above stuff

[root@localhost gcc-build]# make
Configuring in ./libiberty
creating cache ./config.cache
checking host system type... i686-pc-linux-gnu
checking build system type... i686-pc-linux-gnu
checking for ar... ar
checking for ranlib... ranlib
checking for gcc... no
checking for cc... no
configure: error: no acceptable cc found in $PATH
make: *** [configure-target-libiberty] Error 1


[root@localhost gcc-build]# make install
/bin/sh /usr/gcc/gcc-3.0.4/mkinstalldirs /opt-program-suffix=-3.0.4 /opt-program-suffix=-3.0.4
mkdir /opt-program-suffix=-3.0.4


please anybody who got answers for the above situation reply immediately because we are stuck in the middle of a PROJECT AND IM AN APPRENTICER ...TO THIS FIELD

We volunteer our time here, so don't tell us to hurry up and answer you. If you're an apprentice, that implies that you have someone mentoring/tutoring you....have you asked them???

You don't say what version/distro of Linux you have, but unless you HAVE a C compiler installed, you won't be able to compile ANYTHING using C. You can, however, use the online repos to install one. If you're using CentOS/Fedora, try "yum install gcc". A Debian based distro can use "apt-get".