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S-Function Builder. Error using mex: error LNK2019 unresolved external symbol 'Function' referenced in function XXX_Output_wrapper

Asked by Chiedu Mokogwu on 7 Sep 2018

Latest activity Edited by TAB on 7 Sep 2018

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I'm trying to use the S-Function builder to incorporate existing C code to perform an inverse kinematic routine for a robot. I include the header and source files like

The output of my S-Function is

clicking on the 'Build' button in the S-Function Builder gives no errors, however, on compiling the generated files using

mex -v A465_Inverse_Kinematics.c A465_Inverse_Kinematics_wrapper.c

I get the following error:

Error using mex
 Creating library A465_inverse_kinematics.lib and object A465_inverse_kinematics.exp
A465_inverse_kinematics_wrapper.obj : error LNK2019: unresolved external symbol
A465_world_to_joint referenced in function A465_inverse_kinematics_Outputs_wrapper
A465_inverse_kinematics.mexw64 : fatal error LNK1120: 1 unresolved externals

Any ideas what is going wrong? I have the 'A465_world_to_joint' function in the 'Inv_kin.c' source file. Thanks for the help!

(using MSVS2012, MATLAB R2015b, 64bit Windows 10)

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Answer by TAB on 7 Sep 2018

Edited by TAB on 7 Sep 2018

S-function builder builds and produce output mex file directly. Why you need to compile them seprately ?

However....

In S-function builder --> On Build Info tab enable Show Compile Steps

Then give a build from S-function builder. After build is finished, open Simulink diagnostics viewer and analyse the build log. It will show which files are complied and linked exactly.

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Chiedu Mokogwu (view profile)

S-Function Builder. Error using mex: error LNK2019 unresolved external symbol 'Function' referenced in function XXX_Output_wrapper

Chiedu Mokogwu (view profile)