| Variable | Default | Description |
| ISIXE_WITH_LOGGING | OFF | Enables building with logging, requires boost_log |
| ISIXE_WITH_NETWORK | OFF | Enables build of the network subsystem using m2etis |
| ISIXE_WITH_PROFILING | OFF | Enables building with profiling, requires gperftools |
| ISIXE_WITH_TESTING | OFF | Enables building with tests, requires gtest |
| ISIXE_WITH_AUDIO | ON | Enables build of the audio subsystem using OpenALSoft |
| ISIXE_WITH_EDITOR | ON | Enables build of the level editor |
| ISIXE_WITH_SAMPLES | ON | Enables build of sample appilcations |
| ISIXE_WITH_TOOLS | ON | Enables build of tools |
| ISIXE_WITH_RPG | ON | Enables build of RPG module and, if ISIXE_WITH_SAMPLES is ON, also with RPG sample |
| ISIXE_WITH_DOCU | ON | Enables docu target bulding doxygen docu, requires doxygen |
| ISIXE_WITH_TUTORIALS | ON | Enables build of tutorials, requires pdflatex |
| ISIXE_WITH_SCRIPTING | python | Enables build of the scripting subsystem, parameters are "python", "lua" or "" (for no scripting) |
| ISIXE_DEP_DIR | ${CMAKE_SOURCE_DIR}/dependencies | Allows setting of dependencies directory for engine deps (like boost, bullet etc.) |
1.8.9.1 
