Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Do you need the gvc delegate library? If not, this warning can safely be ignored. If so, you need the latest release of gvc to build with ImageMagick. They have made some changes to the library recently which is not backwards comapible with previous versions.