GCC Error When Compiling My Matlab® Simulink® Model for Windows OS with Veristand.tlc

Updated Jul 16, 2020

Reported In


  • VeriStand
  • LabVIEW Model Interface Toolkit

Issue Details

I'm trying to build a simple Simulink® model for my Windows target in VeriStand 2019 R3 or later, but whenever I try to build it, it returns the error:
  • ​​​​"gcc error: unrecognized command line option '-m32'"
This doesn't happen when building the same model for a Linux target.


This error will be present whenever the MATLAB® software pulls a wrong version for the GCC Compiler instead of the required WinGW-W64.

The first thing you need to do is to verify you're installing all the software and components needed to generate a Simulink® model for a Windows target.

If the error still persist, please follow these steps:

1. Install the correct MinGW-w64 - for 32&64 bit Windows Compiler for VeriStand:

  1. Download the MinGW-w64 - for 32 and 64 bit Windows (NOTE: please wait for the download to start automatically)
  2. To install the MinGW-w64 compiler you just need to unzip the "x86_64-8.1.0-release-win32-sjlj-rt_v6-rev0.7z" file to any location where you can run executables with your Windows User. If you’re not sure where you can do this, please ask your IT department.​​​
  3. Edit the System Environment Variables:
  1. Navigate to the System Environment Variables (Windows Start » Control Panel » System » Advanced » Environment Variables)
  2. Add a new System Variable with the Variable Name NI_MINGW_WIN32
  3. The variable value must be the path pointing to the bin directory of the downloaded and unzipped "x86_64-8.1.0-release-win32-sjlj-rt_v6-rev0.7z" where the gcc.exe is located which is the correct GCC Compiler for Veristand for the compilation of Models for the Windows OS.
  • For example "C:\VeriStand\2019\ModelInterface\mingw64\bin"
  • So we would want it to look like this for example:


2. Restart your computer

3. You can now compile a Windows compatible model for use in VeriStand by selecting VeriStand.tlc as the compiler, and VeriStand Compiler for Windows Targets as the toolchain. This process is described in the VeriStand manual.

Additional Information

The MATLAB provided Add-on MinGW-w64 C/C++ Compiler does not support building 32-bit dlls, so you will need to install one that does support buidling 32-bit dlls.
You can find the one such toolchain here: MinGW-w64 - for 32 and 64 bit Windows Compiler (x86_64-win32-sjlj) 

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