Bezitopo development takes place on Github. Discussion takes place on IRC channel #bezitopo on Freenode.
To build Bezitopo, you need CMake and a C++ compiler. If you are packaging Bezitopo, it is fine to put the build directory inside the source directory, but if you are developing it, you should use an out-of-source build. I use the following file to make build directories for building on Linux and BSD:
To cross-compile, use a toolchain file such as the following (adjust filenames and directories for your system):
Bezitopo does not currently require any library but the math library, but it will eventually require a GUI library, most likely Qt5.
After building, run the test. You can type make test or bezitest individual tests. For the geoidboundary test, you will need a whole-earth geoid file which you can download from NGA.