Hello,
I would like to know if it is possible to access (and check) the ROOT version through some environment variable from a makefile.
It is fairly easy to do this within the code itself with preprocessor directives, e.g.
#if ROOT_VERSION_CODE > ROOT_VERSION(6,20,04)
#include "TFITS.h"
#endif
I was wandering if there is some bash environment variable corresponding to ROOT_VERSION_CODE
.
The only thing I had worked out so far is to store the output of root-config --version
in a variable
ROOTVERSION = `root-config --version`
(alternatively the file $ROOTSYS/build/version_number
contains the same number but is available only if you have built ROOT, not in pre-compiled binaries.)
Both cases will return a string with .
and /
separators, e.g. 6.20/04
which will be very difficult to parse in bash in order to apply a numerical check on it.
Any suggestion?
Many thanks!