Disable implicit-function-declaration warning

Author: matthiasblaesing

native/Makefile

@@ -88,7 +88,7 @@ CC=gcc
 LD=$(CC)
 LIBS=
 # Default to Sun recommendations for JNI compilation
-COPT=-O2 -fno-omit-frame-pointer -fno-strict-aliasing
+COPT=-O2 -fno-omit-frame-pointer -fno-strict-aliasing -Wno-implicit-function-declaration
 CASM=-S
 ifeq ($(DEBUG),true)
 CDEBUG=-g