only use _darwin10_Unwind_FindEnclosingFunction on darwin >= 10

gcc:
	* unwind-dw2-fde-darwin.c (_darwin10_Unwind_FindEnclosingFunction):
	Dunmmy function with NULL return unless the target is 
	OSX >= 10.6 (Darwin10).
libjava:
	* include/posix.h: Make substitution of 
	_darwin10_Unwind_FindEnclosingFunction conditional on 
	OSX >= 10.6 (Darwin10).

From-SVN: r163309

gcc/ChangeLog

+2010-08-17  Iain Sandoe  <iains@gcc.gnu.org>
+
+	* unwind-dw2-fde-darwin.c (_darwin10_Unwind_FindEnclosingFunction):
+	Dunmmy function with NULL return unless the target is 
+	OSX >= 10.6 (Darwin10).
+	
 2010-08-17  Jack Howarth <howarth@bromo.med.uc.edu>
 
 	* gcc.c (spec_function): Add remove-outfile.

gcc/unwind-dw2-fde-darwin.c

@@ -276,13 +276,14 @@ _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
 }
 
 void *
-_darwin10_Unwind_FindEnclosingFunction (void *pc)
+_darwin10_Unwind_FindEnclosingFunction (void *pc ATTRIBUTE_UNUSED)
 {
+#if __MACH__ && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1060)
   struct dwarf_eh_bases bases;
   const struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases);
   if (fde)
     return bases.func;
-  else
-    return NULL;
+#endif
+  return NULL;
 }
 

libjava/ChangeLog

+2010-08-17  Iain Sandoe  <iains@gcc.gnu.org>
+
+	* include/posix.h: Make substitution of 
+	_darwin10_Unwind_FindEnclosingFunction conditional on 
+	OSX >= 10.6 (Darwin10).
+	
 2010-08-12  Tom Tromey  <tromey@redhat.com>
 
 	* gnu/java/security/jce/prng/natVMSecureRandomWin32.cc

libjava/include/posix.h

@@ -56,9 +56,9 @@ details.  */
 #define _Jv_platform_solib_suffix ".so"
 #endif
 
-#if defined(__APPLE__) && defined(__MACH__)
-#undef _Unwind_FindEnclosingFunction
-#define _Unwind_FindEnclosingFunction(PC) _darwin10_Unwind_FindEnclosingFunction(PC)
+#if __MACH__ && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1060)
+#  undef _Unwind_FindEnclosingFunction
+#  define _Unwind_FindEnclosingFunction(PC) _darwin10_Unwind_FindEnclosingFunction(PC)
 #endif
 
 // Some POSIX systems don't have O_SYNC and O_DYSNC so we define them here.