Upgrading to campsite version 2.2.2 on redhat 7.3

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while trying to upgrade campsite version 2.1.3 to version 2.2.2 the
following error occured:
Could not find 'g++' - GNU C++ compiler. Please install gcc-c++ package.
is that because campsite 2.2.2 is'nt compatible with the redhat 7.3
gcc-c++?
thanks in advance for your help.

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