Index: Source/NSObject.m
===================================================================
--- Source/NSObject.m	(revision 28264)
+++ Source/NSObject.m	(working copy)
@@ -218,7 +218,14 @@
 #define	GSAtomicIncrement(X)	InterlockedIncrement((LONG volatile*)X)
 #define	GSAtomicDecrement(X)	InterlockedDecrement((LONG volatile*)X)
 
+#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
+/* Use the GCC atomic operations with recent GCC versions */
 
+typedef int32_t volatile *gsatomic_t;
+#define GSATOMICREAD(X) (*(X))
+#define GSAtomicIncrement(X)    __sync_fetch_and_add(X, 1)
+#define GSAtomicDecrement(X)    __sync_fetch_and_sub(X, 1)
+
 #elif	defined(__linux__) && (defined(__i386__) || defined(__x86_64__))
 /* Set up atomic read, increment and decrement for intel style linux
  */
@@ -256,11 +263,11 @@
 {
   int tmp;
   __asm__ __volatile__ (
-    "modified:"
+    "incmodified:"
     "lwarx %0,0,%1 \n"
     "addic %0,%0,1 \n"
     "stwcx. %0,0,%1 \n"
-    "bne- modified \n"
+    "bne- incmodified \n"
     :"=&r" (tmp)
     :"r" (X)
     :"cc", "memory");
@@ -272,11 +279,11 @@
 {
   int tmp;
   __asm__ __volatile__ (
-    "modified:"
+    "decmodified:"
     "lwarx %0,0,%1 \n"
     "addic %0,%0,-1 \n"
     "stwcx. %0,0,%1 \n"
-    "bne- modified \n"
+    "bne- decmodified \n"
     :"=&r" (tmp)
     :"r" (X)
     :"cc", "memory");