How can I ignore all warnings from included headers in clang/gcc?

I want to use #pragma clang diagnostic push to ignore warnings from some included header files. So I write this:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wall"
#include "SpinGenApi/SpinnakerGenApi.h"
#include "Spinnaker.h"
#pragma clang diagnostic pop

But still the compiler prints warnings when compiling the file with this code. What do I need to change so that all warnings are ignored for these headers?