MinGW + Eclipse: Type invalid conversion from 'void

Question

String:

glDebugMessageCallbackARB(&DebugOutputCallback, NULL);

Give me error:

Description Resource Path Location Type invalid conversion from 'void ( attribute (( stdcall )) )(GLenum, GLenum, GLuint, GLenum, GLsizei, const GLchar , GLvoid*) {aka void ( attribute (( stdcall )) )(unsigned int, unsigned int, unsigned int, unsigned int, int, const char , void*)}' to 'GLDEBUGPROCARB {aka void ( attribute (( stdcall )) )(unsigned int, unsigned int, unsigned int, unsigned int, int, const char , const void*)}' [-fpermissive]

Please tell me what wrong?

Answer 1

The compiler is trying to tell you that the signature of your callback function should be

void (*)(GLenum, GLenum, GLuint, GLenum, GLsizei, GLchar, GLvoid const*)

The last parameter of the callback you are passing is GLvoid* , when it should be GLvoid const* .