X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=includes%2FRts.h;h=1bfb37a1bf17e57a9e1d961f1ae1c3660672159e;hb=4bba92f93b88e15f0e0f23732d2cfa540acb737b;hp=59c8c2d3a6949bc631f3a4026900a35397f443ac;hpb=254528e32a007e508bb5967948ba02aa15c7e482;p=ghc-hetmet.git

diff --git a/includes/Rts.h b/includes/Rts.h
index 59c8c2d..1bfb37a 100644
--- a/includes/Rts.h
+++ b/includes/Rts.h
@@ -48,6 +48,29 @@ extern "C" {
 #define ATTRIBUTE_ALIGNED(n) /*nothing*/
 #endif
 
+// Symbols that are extern, but private to the RTS, are declared
+// with visibility "hidden" to hide them outside the RTS shared
+// library.
+#if !defined(mingw32_HOST_OS)
+#define RTS_PRIVATE  GNUC3_ATTRIBUTE(visibility("hidden"))
+#else
+#define RTS_PRIVATE  /* disabled: RTS_PRIVATE */
+#endif
+
+#if __GNUC__ > 4
+#define BEGIN_RTS_PRIVATE #pragma GCC visibility push(hidden)
+#define END_RTS_PRIVATE   #pragma GCC visibility pop
+#else
+#define BEGIN_RTS_PRIVATE /* disabled: BEGIN_RTS_PRIVATE */
+#define END_RTS_PRIVATE   /* disabled: END_RTS_PRIVATE */
+#endif
+
+#if __GNUC__ > 4
+#define RTS_UNLIKELY(p) __builtin_expect((p),0)
+#else
+#define RTS_UNLIKELY(p) p
+#endif
+
 /* Fix for mingw stat problem (done here so it's early enough) */
 #ifdef mingw32_HOST_OS
 #define __MSVCRT__ 1