Declare RTS-private prototypes with __attribute__((visibility("hidden")))

This has no effect with static libraries, but when the RTS is in a
shared library it does two things:

 - it prevents the function from being exposed by the shared library

 - internal calls to the function can use the faster non-PLT calls,
   because the function cannot be overriden at link time.

1 files changed, 8 insertions, 4 deletions

diff --git a/rts/Profiling.h b/rts/Profiling.h
index 8961da9b17..87d81e2f9b 100644
--- a/rts/Profiling.h
+++ b/rts/Profiling.h
@@ -11,6 +11,8 @@
 
 #include <stdio.h>
 
+#pragma GCC visibility push(hidden)
+
 void initProfiling1 (void);
 void freeProfiling1 (void);
 void initProfiling2 (void);
@@ -21,18 +23,20 @@ extern FILE *hp_file;
 
 #ifdef PROFILING
 
-void gen_XML_logfile     ( void );
+void gen_XML_logfile    ( void );
 void reportCCSProfiling ( void );
 
 void PrintNewStackDecls ( void );
 
-extern void fprintCCS( FILE *f, CostCentreStack *ccs );
-extern void fprintCCS_stderr( CostCentreStack *ccs );
+void fprintCCS( FILE *f, CostCentreStack *ccs );
+void fprintCCS_stderr( CostCentreStack *ccs );
 
 #ifdef DEBUG
-extern void debugCCS( CostCentreStack *ccs );
+void debugCCS( CostCentreStack *ccs );
 #endif
 
 #endif
 
+#pragma GCC visibility pop
+
 #endif /* PROFILING_H */