If you are developing a safety-critical system you will not be upgrading your compiler without a very good reason to do so. In the safety-critical systems I've

If you are developing a safety-critical system you will not be upgrading your compiler without a very good reason to do so. In the safety-critical systems I've worked on, even the compiler options are set in stone. Changing either is a huge amount of paperwork and will probably require a re-certification of the entire system.