Symbol 'SysTick_IRQn' could not be resolved
I looked into it a bit and figured that the enum is in the stm32f411xe.h (for my board), under the type name IRQn.
THis header is indeed called and the enum names respect the names that create the errors, I really don't get why...
Anyway, one can replace every IRQn name by its value in enum, but I hope there is a better solution!
By the way, stm32f411xe.h (or any unit's name that you use) is called by stm32f4xx.h, which is called by system_stm32f4xx.c .