# Link issue with dynamic libraries

**URL:** https://discourse.itk.org/t/link-issue-with-dynamic-libraries/1434
**Category:** Engineering
**Created:** [November 21, 2018, 7:52pm UTC](https://discourse.itk.org/t/link-issue-with-dynamic-libraries/1434 "2018-11-21T19:52:54Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![matt.mccormick](https://discourse.itk.org/user_avatar/discourse.itk.org/matt.mccormick/32/7_2.png) [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)
#### Post date: [November 26, 2018, 12:59am UTC](https://discourse.itk.org/t/link-issue-with-dynamic-libraries/1434/2 "2018-11-26T00:59:37Z")

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Hi Simon,

Since ITK is being developed as an ITK External Module 👍 🌟, it can use the ITK external module infrastructure for providing shared libraries. This topic:

> <https://github.com/SimonRit/RTK/pull/224>

Uses `RTK_EXPORT`, defined for macOS / Linux / Windows.

HTH,  
Matt

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_[View the full topic](https://discourse.itk.org/t/link-issue-with-dynamic-libraries/1434)._