Use static linkage for various local names

src/unix/threadpsx.cpp

@@ -688,9 +688,11 @@ extern "C"
 
 #ifdef wxHAVE_PTHREAD_CLEANUP
     // thread exit function
+    static
     void wxPthreadCleanup(void *ptr);
 #endif // wxHAVE_PTHREAD_CLEANUP
 
+static
 void *wxPthreadStart(void *ptr);
 
 } // extern "C"

src/unix/utilsunx.cpp

@@ -1402,7 +1402,8 @@ bool wxUnsetEnv(const wxString& variable)
 
 #include <signal.h>
 
-extern "C" void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
+extern "C" {
+static void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
 {
     if ( wxTheApp )
     {
@@ -1412,6 +1413,7 @@ extern "C" void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
 
     abort();
 }
+}
 
 bool wxHandleFatalExceptions(bool doit)
 {