[Bug target/64953] Compiling sourcecode for STM32F103 causes USB errors with some optimization settings

[manuel.reimer at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64953

--- Comment #17 from manuel.reimer at gmx dot de ---
I've tried that and unfortunately I still get the errors when connecting my
STM32 via USB.

So the only solution, available for me, seems to be to add a note to the
sourcecode that it has to be built with GCC 4.8.

Thank you anyway to everyone who tried to help.