emlib: warnings when using GCC 7 #8266
Description
Description
This error occurs when building the default example for the ikea-tradfri board when using GCC 7.2.0:
Steps to reproduce the issue
Use GCC 7.2.0
make BOARD=ikea-tradfri -C examples/default
Expected results
No compilation errors
Actual results
/home/jgn/work/src/riot/examples/default/bin/pkg/ikea-tradfri/emlib/emlib/src/em_cmu.c: In function ‘CMU_ClockSelectSet’:
/home/jgn/work/src/riot/examples/default/bin/pkg/ikea-tradfri/emlib/emlib/src/em_cmu.c:3463:14: error: this statement may fall through [-Werror=implicit-fallthrough=]
selReg = (selReg == NULL) ? &CMU->LFACLKSEL : selReg;
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jgn/work/src/riot/examples/default/bin/pkg/ikea-tradfri/emlib/emlib/src/em_cmu.c:3480:5: note: here
case CMU_LFECLKSEL_REG:
^~~~
/home/jgn/work/src/riot/examples/default/bin/pkg/ikea-tradfri/emlib/emlib/src/em_cmu.c:3481:14: error: this statement may fall through [-Werror=implicit-fallthrough=]
selReg = (selReg == NULL) ? &CMU->LFECLKSEL : selReg;
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/jgn/work/src/riot/examples/default/bin/pkg/ikea-tradfri/emlib/emlib/src/em_cmu.c:3488:5: note: here
case CMU_LFBCLKSEL_REG:
^~~~
cc1: all warnings being treated as errors
Versions
arm-none-eabi-gcc (Gentoo 7.2.0 p1.1) 7.2.0