From 26133989f1362077cc1deac80880279a8a306a39 Mon Sep 17 00:00:00 2001
From: "daniel@phasevelocity.org" <unknown>
Date: Fri, 22 Aug 2008 06:21:36 +0000
Subject: [PATCH] Add extern flag to avoid multiple symbol errors on Mac os X

---
 rts/sm/BlockAlloc.h |    4 ++--
 rts/sm/GC.h         |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/rts/sm/BlockAlloc.h b/rts/sm/BlockAlloc.h
index 2d777f7..594135a 100644
--- a/rts/sm/BlockAlloc.h
+++ b/rts/sm/BlockAlloc.h
@@ -16,7 +16,7 @@ extern void checkFreeListSanity(void);
 nat         countFreeList(void);
 #endif
 
-lnat n_alloc_blocks;   // currently allocated blocks
-lnat hw_alloc_blocks;  // high-water allocated blocks
+extern lnat n_alloc_blocks;   // currently allocated blocks
+extern lnat hw_alloc_blocks;  // high-water allocated blocks
 
 #endif /* BLOCK_ALLOC_H */
diff --git a/rts/sm/GC.h b/rts/sm/GC.h
index 913df24..5e2e3a5 100644
--- a/rts/sm/GC.h
+++ b/rts/sm/GC.h
@@ -39,7 +39,7 @@ extern SpinLock gc_alloc_block_sync;
 #endif
 
 #if defined(PROF_SPIN) && defined(THREADED_RTS)
-StgWord64 whitehole_spin;
+extern StgWord64 whitehole_spin;
 #endif
 
 #define WORK_UNIT_WORDS 128
-- 
1.7.10.4