- The Undefined Behavior Sanitizer has been ported to GCC.
- ADA and Fortran have seen upgrades.
- Improved C++14 support.
- - RX100, RX200, and RX600 processor support by GCC.
- Intel Silvermont hardware support.
Computers are unreliable, but humans are even more unreliable. Any system which depends on human reliability is unreliable. -- Gilb