The client formerly resided in the Tox core repository and is now available as a standalone version.

To compile, first generate the configure script by running the autoreconf -i command.

Then execute the configure script (you'll probably have to pass it the location of your dependency libraries, i.e.):

./configure --prefix=/where/to/install --with-libtoxcore-headers=/path/to/ProjectTox-Core/core --with-libtoxcore-libs=/path/to/ProjectTox-Core/build/core --with-libsodium-headers=/path/to/libsodium/include/ --with-libsodium-libs=/path/to/sodiumtest/lib/