Spring RTS Engine

I can't get it past the 'cmake .' command. It tells me that the libcurl package is not installed. But the documentation says that the libcurl library is optional, yet the cmake treats as required. Secondly, I do have libcurl3, libcurl4 and cURL packages installed which one of them does install a libcurl.so file. I am using Ubuntu 10.04. What can I do to get cmake to work.

apt-get build-dep springlobby
apt-get install libcurl-dev

Thanks,

I wish the descriptions in the package manager would tell me that libcurl4-dev had a virtual libcurl-dev package within it.