Snort Install Round One: no C compiler (gcc)

I downloaded Snort from http://www.snort.org/downloads. I downloaded the 2.8.4.1 version.
This site http://www.securityfocus.com/infocus/1421 has the instructions to install Snort. This is where I got the instructions to install 'libpcap'.
It also has instuctions on trouble shooting and understanding SNORT
I downloaded libpcap-0.8.1 from http://sourceforge.net/projects/libpcap/.
As I read the Install.txt file I found how to use the command console to install libpcap.

I entered the following into the console
su ---to bring up the root
usergzip -d -c libpcap-0.8.1.tar.gz tar xvf - ---then all the files were listed inside
cd libpcap-0.8.1/ ---going into the folder now
./configure ---and then it configured the setting of computers settings as well it checked the C compiler (gcc ) and recieved a works... no as well as the configure: error: intallation or configuration problem: C compiler cannot create executibles.

Then from there obviously the 'make' commands would not work because the config could not make a file in MakeIn folder adjusted to my system.

After searching through all the following documents and sites I Downloaded cc-4.3.4.tar.gz from http://gcc-ca.internet.bs/releases/gcc-4.3.4/ a mirror of gcc.gnu.org. I'm not sure what to do from here?
How do I install this gcc since I didn't have one.
What is a gcc? It must have something to do with a compiler.

These are the links of numerous sites I have searched inorder to find a solution:

• GCC talking about it latest releases http://gcc.gnu.org/
  
• http://www.gnu.org/ is very interesting site talking about opensource software and what they offer to all.
  
• http://www.linuxquestions.org/questions/programming-9/gcc-compiler-..-245576/
  This is a linux forum telling me that if I don't a gcc, then to go and get one from gcc.gnu.org
  
• http://www.linuxquestions.org/questions/linux-software-2/checking-for-c-compiler-default-output...-configure-error-c-compiler-cannot-create-183861/
  This is one of the many forums that had the same error from different programs or different Linux Operating Systems.
  
• http://ubuntuforums.org/showthread.php?t=356729
  Well with a similar error on the compiler not compiling executable files I followed this forum and found this result...from a user.
  
  I GOT IT! The problem was in the kismet instillation, not the driver like i thought.
  Solution:
  install libpcap 0.8
  ./configure
  make dep
  make
  make install
  I knew it was something stupid.
  I tried 'make dep', but difference since I believe the problem lies with the fact the comiler doesn't work.
• http://tcpick.sourceforge.net/?t=1&p=INSTALL
  is another link that I hoping would help me.
  I read some of the code that looked rather similar to the instruction code from other forums.
  It also reffered me a URL different from the one than I had already downloaded the program 'libpcap'
  
• http://www.nabble.com/-MacPorts---21062:-Snow-Leopard,-fresh-install,-can%27t-install-any-ports-td25281545.html
  This is another piece of info I found on MacPorts.
  Okay well I figured it out for anyone who cares... the Xcode installer that you download from Apple does not install the Unix development package. You have to use the one included on the Snow Leopard disk.
  
• http://www.securityfocus.com/infocus/1421
  this is where I got the instructions to install 'libpcap'.
  It also has instuctions on trouble shooting and understanding SNORT
  
• http://www.snort.org/downloads
  I downloaded what I could see as the latestt SNORT from this site.
  
• http://ubuntuguide.org/wiki/Ubuntu:Jaunty#setchangeenablerootpassword
  this site taught me how to change the 'root' password
  
  I was also reading the Install.txt from libpcap, but it only gave me thesse errors to choose from: If configure says:
  configure: warning: cannot determine packet capture interface
  configure: warning: (see INSTALL for more info)