# Changes between Version 6 and Version 7 of InstallingMars

Ignore:
Timestamp:
Nov 7, 2018, 9:25:33 AM (4 months ago)
Comment:

--

### Legend:

Unmodified
 v6 }}} Before you run *cmake*, please make sure that your root environment has been properly initialized. That is usually the case if you can execute root easily from your commandline or if export | grep ROOTSYS gives a reasonable result. Otherwise, call *thisroot.sh* from your root installation, for example: Before you run *cmake*, please make sure that your root environment has been properly initialized. That is usually the case if you can execute root easily from your commandline or if export | grep ROOTSYS gives a reasonable result. Otherwise, call thisroot.sh from your root installation. Assuming root is installed in /opt/root-6.14.04, this would be: {{{ [X] . /opt/root-6.14.04/bin/thisroot.sh }}} Note that switching from a newer to an older version in this way might fail (CMAKE_PREFIX_PATH will still point to the previous version). Be aware of the dot in front of the path! Note that switching from a newer to an older version in this way might fail (CMAKE_PREFIX_PATH will still point to the previous version). Now call {{{cmake}}} from there (the "{{{..}}}" is intentional!)