diff -r eda6988c0d81 -r f08d439fab8c src/share/vm/utilities/globalDefinitions_gcc.hpp
--- a/src/share/vm/utilities/globalDefinitions_gcc.hpp	Tue Sep 20 23:50:16 2011 -0700
+++ b/src/share/vm/utilities/globalDefinitions_gcc.hpp	Sun Sep 25 16:03:29 2011 -0700
@@ -76,15 +76,28 @@
 # include <sys/procfs.h>
 # endif
 
-#ifdef LINUX
+#if defined(LINUX) || defined(_ALLBSD_SOURCE)
 #ifndef __STDC_LIMIT_MACROS
 #define __STDC_LIMIT_MACROS
 #endif // __STDC_LIMIT_MACROS
 #include <inttypes.h>
 #include <signal.h>
+#ifndef __OpenBSD__
 #include <ucontext.h>
+#endif
+#ifdef __APPLE__
+  #include <AvailabilityMacros.h>
+  #if (MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_4)
+    // Mac OS X 10.4 defines EFL_AC and EFL_ID,
+    // which conflict with hotspot variable names.
+    //
+    // This has been fixed in Mac OS X 10.5.
+    #undef EFL_AC
+    #undef EFL_ID
+  #endif
+#endif
 #include <sys/time.h>
-#endif // LINUX
+#endif // LINUX || _ALLBSD_SOURCE
 
 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
@@ -120,7 +133,7 @@
 // pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >
 // sizeof(void*), so here we want something which is integer type, but has the
 // same size as a pointer.
-#ifdef LINUX
+#ifdef __GNUC__
   #ifdef _LP64
     #define NULL_WORD  0L
   #else
@@ -132,7 +145,7 @@
   #define NULL_WORD  NULL
 #endif
 
-#ifndef LINUX
+#if !defined(LINUX) && !defined(_ALLBSD_SOURCE)
 // Compiler-specific primitive types
 typedef unsigned short     uint16_t;
 #ifndef _UINT32_T
@@ -152,7 +165,7 @@
 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
 #endif // _SYS_INT_TYPES_H
 
-#endif // !LINUX
+#endif // !LINUX && !_ALLBSD_SOURCE
 
 // Additional Java basic types
 
@@ -244,7 +257,9 @@
 inline int g_isnan(float  f) { return isnand(f); }
 #endif
 inline int g_isnan(double f) { return isnand(f); }
-#elif LINUX
+#elif defined(__APPLE__)
+inline int g_isnan(double f) { return isnan(f); }
+#elif defined(LINUX) || defined(_ALLBSD_SOURCE)
 inline int g_isnan(float  f) { return isnanf(f); }
 inline int g_isnan(double f) { return isnan(f); }
 #else