Neutrino uses these environment variables to locate files on the host computer:
| QNX_HOST | The location of host-specific files. |
| QNX_TARGET | The location of target backends on the host machine. |
| QNX_CONFIGURATION | The location of the qconfig configuration files. |
| MAKEFLAGS | The location of included *.mk files. |
| TMPDIR | A directory used for temporary files. The gcc compiler uses temporary files for the output of one stage of compilation used as input to the next stage: for example, the output of the preprocessor, which is the input to the compiler proper. |
The qconfig utility sets these variables according to the version of the QNX Momentics Tool Suite that you specified.