I've just created another release of my bleeding-edge-toolchain script, which builds a complete toolchain for ARM microcontrollers. This toolchain uses the most recent versions of all possible components:
The script itself and precompiled packages for 32-bit and 64-bit Windows are available on http://www.freddiechopin.info/ > Download > Software > bleeding-edge-toolchain. You can also find the script on github https://github.com/FreddieChopin/bleeding-edge-toolchain/releases/tag/190503
Now you just have to patch this file - https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/t-rmprofile?revision=267494&view=markup
If you have a patch, adding it to the script is quite easy, for example like this - github.com/.../build-bleeding-edge-toolchain.sh
Ok, I will give it a try next week.