MATLAB_MEX_FILE undefine is ignored

Question

Nils Herjürgen 2018-8-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415860-matlab_mex_file-undefine-is-ignored

回答： shitao zhan 2018-12-11

Hello,

i am currently writing some s-functions that i also want to use with embedded coder to generate c-code. I use the sfuntmpl_basic.c template and adapt it to my needs (say sfun.c). Then i compile it via

mex sfun.c

to a mex-file. I also use a tlc-file to inline my s-function. In Simulink i use the s-function block and refer it to sfun.c. I want to include a header, say testsim.h, but only for simulation and not for code generation. So in sfun.c i coded:

 #ifdef MATLAB_MEX_FILE
 #include "testsim.h"
 #endif

The simulation works fine, however in the generated code testsim.h is included even MATLAB_MEX_FILE should be undefined now, shouldn't it? What am i doing wrong?

Btw, what actually happens when i press the build button in simulink? Does it take my sfun.c, preprocesses it, compiles it, runs it, interprets the tlc-file and somehow generates the code with the outcomes?

Thank you in advance!