We should be more explicit about which version of the following tools are required by Proton, either in the top level README or in READMEs in the relevant sub-folders:
- Python (see
- cmake? (the required version is specified in the CMakeLists.txt files but maybe it would be polite to mention in the README too).
- Maven? (or maybe we can omit this for same reasons as cmake version)
- possibly others, e.g. openssl, gcc, epydoc, Perl, Ruby etc.