--- old/src/hotspot/os/solaris/os_share_solaris.hpp	2018-05-17 15:07:26.404389600 -0400
+++ new/src/hotspot/os/solaris/os_share_solaris.hpp	2018-05-17 15:07:26.121363334 -0400
@@ -28,9 +28,6 @@
 // Defines the interfaces to Solaris operating systems that vary across platforms
 
 // misc
-extern "C" {
-  void signalHandler(int, siginfo_t*, void*);
-}
 void resolve_lwp_exit_calls(void);
 void handle_unexpected_exception(Thread* thread, int sig, siginfo_t* info, address pc, address adjusted_pc);
 #ifndef PRODUCT