Quote Originally Posted by mut View Post
Should I recompile my Qt Creator sources each time that I produce new myplugin.dll, myplugin.a and myplugin.pluginspec files?
No, you just need to build your plugin.

Why is it necessary to have the Qt Creator sources in the first place?
Because in your plugin you are including files that are part of Qt Creator source code and because some tools are needed during compilation of your plugin that are part of Qt Creator source code bundle.