Mex select wrong linker

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Matteo Lodi
Matteo Lodi 2018-3-14
评论： Wilson González 2021-5-14
I have a problem with mex linker.
I have two files a.cpp and b.cpp and I create both object files a.obj and b.obj through mex -c command. Now I want to create the executable mex file through mex a.obj b.obj but when I try I get the error "undefined reference to operator new". Then I try with -v and -n options and I see that matlab uses gcc to link files instead of g++!
How can I manually switch between c\c++ compiler?
  2 个评论
Michal Misiaszek
Michal Misiaszek 2019-7-31
I have same problem and mex -setup c++ does not solve it.
Michal Misiaszek
Michal Misiaszek 2019-7-31
The solution is to give mex flag
mex -cxx

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回答（2 个）

Sonam Gupta
Sonam Gupta 2018-3-26
mex -setup command helps you to select the desired compiler. Following documentation provides more information about the same:
https://www.mathworks.com/help/matlab/matlab_external/changing-default-compiler.html
  2 个评论
Michal Misiaszek
Michal Misiaszek 2019-7-31
I use mex -setup command to set it to C++ but when I call mex to link object files it goes back to C instead of C++. How I can force mext to use g++ ? Please note I am just linking with MEX not compiling.
Wilson González
Wilson González 2021-5-14
Having a similar situation to link .o files previously compiled with gfortran. Have you found a solution?

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Michal Misiaszek
Michal Misiaszek 2019-7-31
Try to use
mex -cxx

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