On Fri, 23 Dec 2016, Dennis Clarke wrote:
The primary GCC website lists only two versions as being "Supported Releases" and they are 6.3 and 5.4 which are both what I call "point zero releases" in that the final digit in the release version is a zero and has been a zero for a while.
https://gcc.gnu.org/develop.html#num_scheme -- Marc Glisse
