When I try to install libdvdcss on my PC using Redhat 9.0 as an OS, I get the following error
no acceptable C compiler found in $path
When I enter ./configure I get the following
checking build system type. . . i686-pc-linux-gnu
checking host system type. . . i686-pc-linux-gnu
checking target system type. . . i686-pc-linux-gnu
checking for a BSD-compatible install. . . /usr/bin/install -c
checking whether build environment is sane. . . yes
checking for gawk. . . gawk
checking whether make sets $(MAKE) . . . yes
checking for gcc . . . no
checking for cc . . . no
checking for cc . . . no
checking for cl . . . no
configure: error: no acceptable C compiler found in $path
Any help is appreciated.

Looks like you've got no gcc compiler...

Try doing an rpm search for "gcc*" and downloading/installing appropriate packages for your situation.

Alternatively, you may try this link which I used to search for the above.

When I try to install the gcc compiler from Redhat 9.0 disc #1 I get the following error
unlocatable package required by
krb5-libs=1.2.7-10 krb5-devel
openssl=0.9.7a-2 openssl-devel
Also does the base package not load the gcc compiler as a default in Redhat 9.0 ?

The standard install does not install a compiler. Go to the menu called "install/remove applications" (if you are using KDE) and enter your root password and scroll down to the bottom and select development applications. That should include everything you need to compile.

When I try to install from the Redhat disc, it gives the error that krb5-libs=1.2.7-10 and openssl=0.9.7a-10 are unlocatable package.

You are installing the rpm manually, right? Using "rpm -ivh...." It would be easier if you installed gcc through Redhat's add/remove application. The packages it is looking for are on a different disk (disk 2).

How do I install from disc #2 ? If you can be detailed it would be greatly appreciated.

Again, I want to emphasize, that you do not need to install gcc from the command line, in fact, I would not recommend it since you are having these problems. Choose System Settings|Add/Remove Applications from the kmenu, and install it that way. The reason is that the rpm dependency issues will be resolved and you will be prompted for a different disk if it is needed. It is much more simple that installing from the command line.

You are running into a dependency problem. You see at some point after your fresh install of Redhat 9 Krb 5 and Open SSL got updated. So now when you try to install the development libraries it can't find the old packages anymore on your system. Using the Add/Remove Applications won't get around this.

Here is an old thread on the subject:
Fresh RH9 install -- oops I forgot to install something