General :: Sh Can't Find 'cc' When Gcc Has Already Been Installed?

I am trying to compile an android project, which requires GCC-4.3(mandatory, GCC-4.4 doesn't work). So I downgraded the gcc-4.4 on my ubuntu 10.04 to gcc-4.3.

But then the compiling process doesn't work. It says:
cc: command not found
make: *** [...] error 127

It's weird that the shell can't find 'cc' while I do have gcc-4.3 installed.
I've tried type the following command:
export CC="/usr/bin/gcc-4.3"
but I don't know what's it for.