add a CHANGELOG entry for the breaking GVDLL change in cgraph.h

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a74d15d86517e75acc35ba4c19d96862dcbd458c..3fd3a43715980346a332f5300b1eaf9a9ae9287d 100644 (file)
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- **Breaking**: Using Graphviz as a library on Windows now requires the `GVDLL`
+  symbol to be set to ensure correct linking.
 - The Ming plugin that produced Shockwave files has been removed. This format
   was EOLed by Adobe in April 2019. #2160
 - CentOS 7 packages now include libmingle and the `mingle` program.