The RCS versions numbers are 2 decimal numbers separated by a decimal point. For example iin "2.7", the major version number is 2 and the minor version number is 7. If two programs communicate there should be no problem if the versions of RCS used differ only by a minor version number, but if they differ by a major version number then it is likely that one or both programs may need to be updated.
There are several ways that programmers can test the RCS version.
RCS_VERSION is a macro defined in rcs.hh, of the form "m.n", where m is the major version number and n is minor version number.
This function prints a line describing the RCS library, it's version, date compiled etc.
This function allows users to determine if the RCS library linked in is newer or older than a particular version. It returns 0 if the version matches, -1 if the RCS library linked in is older than compversion, and +1 if the RCS library linked in is newer than compversion. If no minor number is included in compversion any version with the given major number will return 0.
Not Implemented yet.