How to enable C / C++ asserts?

RE: How to enable C / C++ asserts?

Torsten Robitzki — Mon, 07 Jul 2025 11:42:28 GMT

Zephyr seems to set the NDEBUG on the command line as soon as the build is not a debug build. Using `CONFIG_COMPILER_OPT="-UNDEBUG"` will add `-UNDEBUG` to the command line and thus will remove the `NDEBUG` definition from the compilation.

RE: How to enable C / C++ asserts?

Torsten Robitzki — Fri, 07 Feb 2025 06:04:28 GMT

Hi Jakob,

I stumbled over this, by observing asserts, that I thought should fire, but did not. I added an `assert(false)` to my application code and it did not fire. I added

#ifdef NDEBUG
#undef NDEBUG
#endif

#include <cassert>

to the file in question and finally, `assert( false )` fired.

I have not found anything in my CMakeLists.txt that would add NDEBUG to the set of defines.

best regards

Torsten

RE: How to enable C / C++ asserts?

Jakob Ruhe — Thu, 06 Feb 2025 22:44:36 GMT

As far as I know Zephyr does not define the symbol `NDEBUG` for you. What makes you think that?

If you modify the sample application `hello_world` to include `assert.h` and call `assert(0)`. What happens when you run it?