using #ifdef in c++ generated mexcode
显示 更早的评论
Hello,
I am calling mexFunction.cpp from matlab
coder.ceval('mexMiFunction', .....);
the mex function in c++ originally looks like this,
void mexMiFunction(int nlhs, mxArray* plhs[],
int nrhs, const mxArray* prhs[])
{
.....
}
but I want to be able to run 2 different codes , depending on if we are generating code using CodeGenerator or not. It would look like this
#ifdef CODER //takes this path if we are using code generator
int miCustomFunction(...)
{
.... different implementation
}
#else
void mexMiFunction(int nlhs, mxArray* plhs[],
int nrhs, const mxArray* prhs[])
{
.....
}
#endif
How can I do it? thanks a lot.
采纳的回答
Varun
2023-11-27
Hi Ebaneo,
I understand that you want to conditionally compile different parts of your code depending on whether you are using the Code Generator or not, you can use preprocessor directives in your C++ code.
In your case, you've already provided an example with the "#ifdef" and "#else" directives. However, you need to define the "CODER" macro when generating code using the Code Generator.
In your MATLAB code, when you call the "coder.ceval" function, you need to ensure that the "CODER" macro is defined. You can do this by using
coder.updateBuildInfo('addDefines', '-CODER');
For example, in MATLAB, before calling coder.ceval, you can set the compiler options like this:
coder.updateBuildInfo('addDefines', '-CODER');
coder.ceval('mexMiFunction', ...);
This tells the compiler to define the "CODER" macro during compilation, so the code inside the "#ifdef CODER" block will be included.
Refer the following documentation to learn more about using “coder.updateBuildInfo” function:
Hope this helps.
1 个评论
Ebaneo Enrique
2023-12-1
编辑：Ebaneo Enrique
2023-12-1
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 MATLAB Coder 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
