What is max length for an C/C++ identifier on common (build) systems?

Question

I don\'t remember the standard saying something of the max length for identifiers so in theory they can be long. In real life, those names could be limited by at least

Answer 1

• Microsoft C++: 2048 characters
• Intel C++: 2048 characters
• g++: No limit, as answered in this question: is there a length limit on g++ variable names?