I'm using mingw32-make to compile a qt project that uses opengl, it compiles correctly and everything, but it spits countless warning messages of the form:

c:/qt3/include/qcolor.h:67: warning: inline function `int qGray(int, int, 
int)' declared as dllimport: attribute ignored

For this particular instance, the function declaration is:

Q_EXPORT inline int qGray( int r, int g, int b )// convert R,G,B to gray 0..255
{ return (r*11+g*16+b*5)/32; }

My question is, why is it spitting all these warning? how can I silence them without silencing other legitimate warnings (i.e. warnings that are related directly to my code and could be potential problems)?

More importantly, why is mingw ignoring the dll import attribute in the first place?