Undefined external "__iar_HWMUL"

Technical Note 79022

Architectures:

MSP430

Component:

linker

Updated:

5/31/2018 9:14 AM

Introduction

Trying to build an established project using IAR Embedded Workbench for MSP430 version 6.20 (or later), linking fails with the message

Error[e46]: Undefined external "__iar_HWMUL" ...

Suggested solution

Use the default linker xcl-file for the installation you are using.

Background

The symbol __iar_HWMUL was introduced with IAR Embedded Workbench for MSP430 version 6.20.

Using lnk430f149.xcl as example, there are new lines as below:

// -----------------------------------------------
// Hardware multiplier location
//
-D__iar_HWMUL=130

Note

In general, there are good reason to use only matching versions (e.g., header files, xcl-files, libraries, tools from the same release).

 

All product names are trademarks or registered trademarks of their respective owners.

We do no longer support Internet Explorer. To get the best experience of iar.com, we recommend upgrading to a modern browser such as Chrome or Edge.