[CMAKE] noreturn function does return. Or _exit and abort are shadowed in the build

[Tecnologic]

Hi all,

when i build with cmake i get the below warning:

[build] [2/36] Building C object hardware/batterycasecontroller/modm/CMakeFiles/modm.dir/ext/gcc/cabi.c.obj [build] C:/Projekte/unimoc/hardware/batterycasecontroller/modm/ext/gcc/cabi.c: In function '_exit': [build] C:/Projekte/unimoc/hardware/batterycasecontroller/modm/ext/gcc/cabi.c:20:1: warning: 'noreturn' function does return [build] 20 | } [build] | ^ [build] C:/Projekte/unimoc/hardware/batterycasecontroller/modm/ext/gcc/cabi.c: In function 'abort': [build] C:/Projekte/unimoc/hardware/batterycasecontroller/modm/ext/gcc/cabi.c:26:1: warning: 'noreturn' function does return [build] 26 | } [build] | ^

If i comment the _exit and abort fuction in cabi.c file the build is still successful but the warning is gone. So i suspect that a noreturn void _exit and noreturn void abort is defined somewere else. So i ask my self whether its an issue of the cmake build including a clib part that isn't supposed to be included in the build.

Does anyone have hints on this?

BR

Alex

[salkinium]

These functions are defined in newlib. I'm not sure but at some point we needed to start defining them otherwise the link step failed. What happens if you remove the return statements?

[Tecnologic]

The modm cabi.c implementations don't have a return. But they use the assert which returns internally. So I'm not sure how to handle this. The easy way would be to disable the warning for that file in cmake but I don't like it, I would like to understand the issue first.