How can I add additional linker flags to the generated makefile?

I am generating C/C++ code from a Simulink model using Simulink Coder or Embedded Coder.

When I try to compile the generated code by running the .bat file, I get a linking error complaining about a conflict between LIBCMT and MSVCRT, with a suggestion to add the /NODEFAULTLIB:libname option to the linker flags.

I have found that adding this option to the ADDITIONAL_LDFLAGS field of the generated .mk file solves the issue. How can this option be automatically added to the generated makefile?

Answer 1

[MathWorks Support Team]

You can add link options to the model build information by using the "addlinkflags" function. To learn more, see the following documentation page:

https://www.mathworks.com/help/releases/R2020a/rtw/ref/addlinkflags.html

To add the additional linker flags to the makefile, follow below steps:

1) Create a MATLAB function setBuildArgs.m with the following code inside:

function setBuildArgs(buildInfo)
linkFlags={'/NODEFAULTLIB:libname'};
addLinkFlags(buildInfo,linkFlags);

2) Open the model you want to generate code from, execute the following command:

>> set_param(gcs,'PostCodeGenCommand','setBuildArgs(buildInfo)');

3) Generate code and check the .mk file. The flag /NODEFAULTLIB:libname should now appear in the ADDITIONAL_LDFLAGS field.