Since you are mentioning SConstruct, I assume you are speaking about the v1.19.2 branch of the Cool VL Viewer... Be aware that this branch is old (and soon to be deprecated), and will probably never successfully build to 64bits binaries. For 64 bits machine, you should prefer v1.25.0 (and then use cmake-SL). Note however that I provide ZERO support for 64bits builds (even the newest Snowstorm official branch of SL viewers still got issues with 64bits builds...).
As for a FAQ about building, see
this message (even though it deals with Windows builds, there is also info about Linux builds in it).