There seems to be a lot of confusion in the comments here. At one time, GCC had three-part version numbers: major.minor.patchlevel. Starting with gcc 5, they

There seems to be a lot of confusion in the comments here. At one time, GCC had three-part version numbers: major.minor.patchlevel. Starting with gcc 5, they switched to a two-part scheme: just major.patchlevel. 7.5 adds nothing but bug fixes to 7.4, there are no new features. That's why the changes page pointed to on gcc.gnu.org only describes gcc7 changes. https://gcc.gnu.org/develop.html#timeline https://gcc.gnu.org/develop.html#timeline gives a good picture of how gcc releases work.