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"

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ian alers
ian alers 2024-2-21
编辑： Francesco 2024-10-18
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.
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Francesco
Francesco 2024-10-18
编辑：Francesco 2024-10-18
I have the same error, generated by tic toc function and toolchain gnu tools for ARM Embedded Processor. Removing tic/toc the error disappears.

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回答（1 个）

R
R 2024-3-21
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!

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