Description:

GraphicsMagick-c++-devel contains header files you'll need to develop
GraphicsMagick applications using the Magick++ C++ bindings. GraphicsMagick
is an image manipulation program.

If you want to create applications that will use Magick++ code or
APIs, you'll need to install GraphicsMagick-c++-devel, GraphicsMagick-devel
and GraphicsMagick. You don't need to install it if you just want to use
GraphicsMagick, or if you want to develop/compile applications using the
GraphicsMagick C interface, however.