I'm getting an error in Xcode, which uses C + +, saying "no rule to process file '/Downloads/downloaded plugins for editing/GLS editor/glslEditorAudioPlugin-master/GLSLPlugIn/Source/GLSLComponent.h' of type sourcecode.c.h for architecture x8664." I want to keep the file GLSLComponent.h since getting rid of it results in more errors, but I don't know how to process a file in C++, or what the command for that is, even after Googling it. What should I do or put into the code?