Simulink real time desktop : I get the following error gmake: *** [coder_posix_time.o] Error 1, when trying to build "Run in real time" in "run in kernel"

These are the errors I get when compiling a Simulink program in Desktop Real Time, using "Run in Real Time" and "Run in Kernel" options:

C:/PROGRA~1/MATLAB/R2022b/toolbox/eml/externalDependency/timefun/coder_posix_time.c:94:14: warning: implicit declaration of function 'clock_gettime' is invalid in C99 [-Wimplicit-function-declaration] status = clock_gettime(CLOCK_MONOTONIC, &tspec); ^ C:/PROGRA~1/MATLAB/R2022b/toolbox/eml/externalDependency/timefun/coder_posix_time.c:94:28: error: use of undeclared identifier 'CLOCK_MONOTONIC' status = clock_gettime(CLOCK_MONOTONIC, &tspec); ^ C:/PROGRA~1/MATLAB/R2022b/toolbox/eml/externalDependency/timefun/coder_posix_time.c:147:14: warning: implicit declaration of function 'clock_gettime' is invalid in C99 [-Wimplicit-function-declaration] status = clock_gettime(CLOCK_REALTIME, &ts); ^ C:/PROGRA~1/MATLAB/R2022b/toolbox/eml/externalDependency/timefun/coder_posix_time.c:147:28: error: use of undeclared identifier 'CLOCK_REALTIME' status = clock_gettime(CLOCK_REALTIME, &ts);

Any help in resolving this error would be appreciated.

[Francesco]

I have the same error, generated by tic toc function and toolchain gnu tools for ARM Embedded Processor. Removing tic/toc the error disappears.

Answer 1

[R]

Hey,

I encountered a similar issue while trying to calculate simulation time. I found that the function "clock_gettime" is not suitable for my workflow, and therefore, I used the Clock block instead.

https://www.mathworks.com/help/simulink/slref/clock.html

Hopefully, this helps you in resolving the error too!