On Monday, 19 October 2020 at 06:25:17 UTC, Severin Teona wrote:
- 'munmap' - 'clock_gettime' - `pthread_mutex_trylock' etc.
These are typically calls found in a Unix system, Linux for example. In a microcontroller you will likely not support these at all except clock_gettime.
You need to dissect druntime a bit further to remove these and/or find a replacement that does the same thing.