When configuring Xmule I get this error.
I have replaced my IP with stars for privacy.

*******************/Desktop/xmule/xmule-1.13.6> ./configure
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 g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking for C++ compiler default output file name... configure: error: C++ compiler cannot create executables
See `config.log' for more details.
****************/Desktop/xmule/xmule-1.13.6>

I'm very new to linux in general and don't know where to start.
I believe I have gcc installed but i'm not sure what other
compilers and libraries I need installed.
Thanks in advance for any help.

seems like you don't have a compiler installed at all - at least not a C++ compiler.

Check that it is installed with the help of the package-management tools your distribution provides...

Since you did not give this info - eighter find out yourself with the help of the tools mentioned or post what distribution you are using.

Now would be a good time to update your profile - to show this info in every post for others to see...

It looks you don't have c++ compiler. What's more, it looks you have no complier at all. It means you need to install gcc package. Use your distribution's package management tool. If you're unsure which gcc pakages you need (there are many), install them all.

Then tun ./configure again. Should be better. However, it may stop at a later stage. It looks you don't have development packages (they have no use without a compiler). When you get an error, look at the message and try to find package/program name in it. Then look if you have such package and package-devel. If not, install.

This way you should be able to go through configure.