diff --git a/src/nvcore/Debug.cpp b/src/nvcore/Debug.cpp
index 837e16e..c861a66 100644
--- a/src/nvcore/Debug.cpp
+++ b/src/nvcore/Debug.cpp
@@ -28,7 +28,7 @@
 #endif
 
 #if NV_OS_LINUX && defined(HAVE_EXECINFO_H)
-#	include <execinfo.h>
+#	include <execinfo.h> // backtrace
 #	if NV_CC_GNUC // defined(HAVE_CXXABI_H)
 #		include <cxxabi.h>
 #	endif
@@ -39,6 +39,13 @@
 #	include <sys/types.h>
 #	include <sys/sysctl.h>	// sysctl
 #	include <ucontext.h>
+#	undef HAVE_EXECINFO_H
+#	if defined(HAVE_EXECINFO_H) // only after OSX 10.5
+#		include <execinfo.h> // backtrace
+#		if NV_CC_GNUC // defined(HAVE_CXXABI_H)
+#			include <cxxabi.h>
+#		endif
+#	endif
 #endif
 
 #include <stdexcept> // std::runtime_error
@@ -128,6 +135,10 @@ namespace
 
 #if defined(HAVE_EXECINFO_H) // NV_OS_LINUX
 
+	static bool nvHasStackTrace() {
+		return backtrace != NULL;
+	}
+
 	static void nvPrintStackTrace(void * trace[], int size, int start=0) {
 		char ** string_array = backtrace_symbols(trace, size);
 	
@@ -166,24 +177,36 @@ namespace
 
 	static void * callerAddress(void * secret)
 	{
-#	if NV_OS_DARWIN && NV_CPU_PPC
-		ucontext_t * ucp = (ucontext_t *)secret;
-        return (void *) ucp->uc_mcontext->ss.srr0;
-#	elif NV_OS_DARWIN && NV_CPU_X86
-		ucontext_t * ucp = (ucontext_t *)secret;
-        return (void *) ucp->uc_mcontext->ss.eip;
-#	elif NV_CPU_X86_64
-		// #define REG_RIP REG_INDEX(rip) // seems to be 16
-		ucontext_t * ucp = (ucontext_t *)secret;
-		return (void *)ucp->uc_mcontext.gregs[REG_RIP];
-#	elif NV_CPU_X86
-		ucontext_t * ucp = (ucontext_t *)secret;
-		return (void *)ucp->uc_mcontext.gregs[14/*REG_EIP*/];
-#	elif NV_CPU_PPC
-		ucontext_t * ucp = (ucontext_t *)secret;
-		return (void *) ucp->uc_mcontext.regs->nip;
+#	if NV_OS_DARWIN
+#		if defined(_STRUCT_MCONTEXT)
+#			if NV_CPU_PPC
+				ucontext_t * ucp = (ucontext_t *)secret;
+				return (void *) ucp->uc_mcontext->__ss.__srr0;
+#			elif NV_CPU_X86
+				ucontext_t * ucp = (ucontext_t *)secret;
+				return (void *) ucp->uc_mcontext->__ss.__eip;
+#			endif
+#		else
+#			if NV_CPU_PPC
+				ucontext_t * ucp = (ucontext_t *)secret;
+				return (void *) ucp->uc_mcontext->ss.srr0;
+#			elif NV_CPU_X86
+				ucontext_t * ucp = (ucontext_t *)secret;
+				return (void *) ucp->uc_mcontext->ss.eip;
+#			endif
+#		endif
 #	else
-		return NULL;
+#		if NV_CPU_X86_64
+			// #define REG_RIP REG_INDEX(rip) // seems to be 16
+			ucontext_t * ucp = (ucontext_t *)secret;
+			return (void *)ucp->uc_mcontext.gregs[REG_RIP];
+#		elif NV_CPU_X86
+			ucontext_t * ucp = (ucontext_t *)secret;
+			return (void *)ucp->uc_mcontext.gregs[14/*REG_EIP*/];
+#		elif NV_CPU_PPC
+			ucontext_t * ucp = (ucontext_t *)secret;
+			return (void *) ucp->uc_mcontext.regs->nip;
+#		endif
 #	endif
 		
 		// How to obtain the instruction pointers in different platforms, from mlton's source code.
@@ -228,17 +251,18 @@ namespace
 		}
 		
 #	if defined(HAVE_EXECINFO_H)
+		if (nvHasStackTrace()) // in case of weak linking
+		{
+			void * trace[64];
+			int size = backtrace(trace, 64);
 		
-		void * trace[64];
-		int size = backtrace(trace, 64);
-		
-		if (pnt != NULL) {
-			// Overwrite sigaction with caller's address.
-			trace[1] = pnt;
+			if (pnt != NULL) {
+				// Overwrite sigaction with caller's address.
+				trace[1] = pnt;
+			}
+			
+			nvPrintStackTrace(trace, size, 1);
 		}
-		
-		nvPrintStackTrace(trace, size, 1);
-		
 #	endif // defined(HAVE_EXECINFO_H)
 		
 		exit(0);
@@ -373,9 +397,12 @@ namespace
 #		endif
 
 #		if defined(HAVE_EXECINFO_H)
-			void * trace[64];
-			int size = backtrace(trace, 64);
-			nvPrintStackTrace(trace, size, 3);
+			if (nvHasStackTrace())
+			{
+				void * trace[64];
+				int size = backtrace(trace, 64);
+				nvPrintStackTrace(trace, size, 3);
+			}
 #		endif
 
 			// Exit cleanly.
@@ -422,9 +449,12 @@ void NV_CDECL nvDebug(const char *msg, ...)
 void debug::dumpInfo()
 {
 #if !NV_OS_WIN32 && defined(HAVE_SIGNAL_H) && defined(HAVE_EXECINFO_H)
-	void * trace[64];
-	int size = backtrace(trace, 64);
-	nvPrintStackTrace(trace, size, 1);
+	if (nvHasStackTrace())
+	{
+		void * trace[64];
+		int size = backtrace(trace, 64);
+		nvPrintStackTrace(trace, size, 1);
+	}
 #endif
 }
 
diff --git a/src/nvcore/DefsGnucDarwin.h b/src/nvcore/DefsGnucDarwin.h
index 1e6e41a..5442b79 100644
--- a/src/nvcore/DefsGnucDarwin.h
+++ b/src/nvcore/DefsGnucDarwin.h
@@ -2,8 +2,7 @@
 #error "Do not include this file directly."
 #endif
 
-#include <stdlib.h>	// uint8_t, int8_t, ...
-
+#include <stdint.h> // uint8_t, int8_t, ...
 
 // Function linkage
 #define DLL_IMPORT
diff --git a/src/nvcore/DefsVcWin32.h b/src/nvcore/DefsVcWin32.h
index 6149cbb..c025625 100644
--- a/src/nvcore/DefsVcWin32.h
+++ b/src/nvcore/DefsVcWin32.h
@@ -19,7 +19,9 @@
 
 // Set standard function names.
 #define snprintf _snprintf
-#define vsnprintf _vsnprintf
+#if _MSC_VER < 1500
+#	define vsnprintf _vsnprintf
+#endif
 #define vsscanf _vsscanf
 #define chdir _chdir
 #define getcwd _getcwd 
diff --git a/src/nvcore/Prefetch.h b/src/nvcore/Prefetch.h
index aa0bcfc..71bd0ed 100644
--- a/src/nvcore/Prefetch.h
+++ b/src/nvcore/Prefetch.h
@@ -24,7 +24,7 @@ __forceinline void nvPrefetch(const void * mem)
 #else // NV_CC_MSVC
 
 // do nothing in other case.
-#define piPrefetch(ptr)
+#define nvPrefetch(ptr)
 
 #endif // NV_CC_MSVC