Version Comparison Macros for C++

[jleibs]

It would be beneficial to provide a method to check versions using macro/preprocessors for cases where the code must support multiple versions.

Although there is the RERUN_SDK_HEADER_VERSION preprocessor available, its value is a string (e.g., "0.15.0"), making comparison difficult. It would be more practical to change it to a comparable value like 001500 or to provide separate version numbers for major, minor, and patches that can be compared using a utility macro such as:

#define RERUN_SDK_HEADER_VERSION_MAJOR 0
#define RERUN_SDK_HEADER_VERSION_MINOR 15
#define RERUN_SDK_HEADER_VERSION_PATCH 0
#define RERUN_SDK_HEADER_VERSION_GT(major, minor, patch) ...

[emilk]

We have a similar need in Python