GCC support: Suppress warnings within gmm code

Former-commit-id: 21e618635e [formerly 541f68f516]
Former-commit-id: cce71ed538

src/utility/gmm.h

@@ -4,9 +4,13 @@
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-variable"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
 #include "gmm/gmm_matrix.h"
 #include "gmm/gmm_iter_solvers.h"
 
+#pragma GCC diagnostic pop
 #pragma clang diagnostic pop
 
 #endif /* STORM_UTILITY_GMM_H_ */