Issue when import programme from MBED Posted by tarek bouchkati on 2016-01-25 22:05 Hello Thierry, Have you tried adding syscalls.c to your project ? Update: try adding "-specs=nosys.specs" to linker miscellaneous flags (Project Properties > C/C++ Build > Settings > Tool Settings TAB > MCU GCC Linker > Miscellaneous > Linker flags)