1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 7d2b8ff..6f48e10 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -1605,6 +1605,26 @@ process_options (void)
       flag_associative_math = 0;
     }
 
+  /* -fstack-clash-protection is not currently supported on targets
+     where the stack grows up.  */
+  if (flag_stack_clash_protection && !STACK_GROWS_DOWNWARD)
+    {
+      warning_at (UNKNOWN_LOCATION, 0,
+		  "%<-fstack-clash-protection%> is not supported on targets "
+		  "where the stack grows from lower to higher addresses");
+      flag_stack_clash_protection = 0;
+    }
+
+  /* We can not support -fstack-check= and -fstack-clash-protection at
+     the same time.  */
+  if (flag_stack_check != NO_STACK_CHECK && flag_stack_clash_protection)
+    {
+      warning_at (UNKNOWN_LOCATION, 0,
+		  "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
+		  "mutually exclusive.  Disabling %<-fstack-check=%>");
+      flag_stack_check = NO_STACK_CHECK;
+    }
+
   /* With -fcx-limited-range, we do cheap and quick complex arithmetic.  */
   if (flag_cx_limited_range)
     flag_complex_method = 0;