Mex select wrong linker

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?

[Michal Misiaszek]

I have same problem and mex -setup c++ does not solve it.

[Michal Misiaszek]

The solution is to give mex flag

mex -cxx

Answer 1

[Sonam Gupta]

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

[Michal Misiaszek]

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]

Having a similar situation to link .o files previously compiled with gfortran. Have you found a solution?

Answer 2

[Michal Misiaszek]

Try to use

mex -cxx