Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler: /usr/local/bin/arm-none-eabi-gcc 
Build flags: ;-mcpu=cortex-m0plus;-mthumb
Id flags:  

The output was:
1
/usr/local/Cellar/arm-none-eabi-gcc/9-2019-q4-major/gcc/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: /usr/local/Cellar/arm-none-eabi-gcc/9-2019-q4-major/gcc/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/lib/thumb/v6-m/nofp/libc.a(lib_a-exit.o): in function `exit':
exit.c:(.text.exit+0x18): undefined reference to `_exit'
collect2: error: ld returned 1 exit status


Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: /usr/local/bin/arm-none-eabi-g++ 
Build flags: ;-mcpu=cortex-m0plus;-mthumb
Id flags:  

The output was:
1
/usr/local/Cellar/arm-none-eabi-gcc/9-2019-q4-major/gcc/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/bin/ld: /usr/local/Cellar/arm-none-eabi-gcc/9-2019-q4-major/gcc/bin/../lib/gcc/arm-none-eabi/9.2.1/../../../../arm-none-eabi/lib/thumb/v6-m/nofp/libc.a(lib_a-exit.o): in function `exit':
exit.c:(.text.exit+0x18): undefined reference to `_exit'
collect2: error: ld returned 1 exit status