avr.c (avr_handle_fndecl_attribute): Generate a warning if the function name…

avr.c (avr_handle_fndecl_attribute): Generate a warning if the function name does not begin with "__vector" and the...

	* config/avr/avr.c (avr_handle_fndecl_attribute): Generate a
	warning if the function name does not begin with "__vector" and the
	function has either the 'signal' or 'interrupt' attribute.

From-SVN: r91433

gcc/ChangeLog

 2004-11-28  Theodore A. Roth  <troth@openavr.org>
 
+	* config/avr/avr.c (avr_handle_fndecl_attribute): Generate a
+	warning if the function name does not begin with "__vector" and the
+	function has either the 'signal' or 'interrupt' attribute.
+
+2004-11-28  Theodore A. Roth  <troth@openavr.org>
+
 	* config/avr/avr.c (avr_mcu_types): Add entries for atmega48,
 	atmega88, atmega168, attiny13, attiny2313, at90can128, atmega165,
 	atmega325, atmega3250, atmega645 and atmega6450.

gcc/config/avr/avr.c

@@ -4545,6 +4545,32 @@ avr_handle_fndecl_attribute (tree *node, tree name,
 	       IDENTIFIER_POINTER (name));
       *no_add_attrs = true;
     }
+  else
+    {
+      const char *func_name = IDENTIFIER_POINTER (DECL_NAME (*node));
+      const char *attr = IDENTIFIER_POINTER (name);
+
+      /* If the function has the 'signal' or 'interrupt' attribute, test to
+         make sure that the name of the function is "__vector_NN" so as to
+         catch when the user misspells the interrupt vector name.  */
+
+      if (strncmp (attr, "interrupt", strlen ("interrupt")) == 0)
+        {
+          if (strncmp (func_name, "__vector", strlen ("__vector")) != 0)
+            {
+              warning ("`%s' appears to be a misspelled interrupt handler",
+                       func_name);
+            }
+        }
+      else if (strncmp (attr, "signal", strlen ("signal")) == 0)
+        {
+          if (strncmp (func_name, "__vector", strlen ("__vector")) != 0)
+            {
+              warning ("`%s' appears to be a misspelled signal handler",
+                       func_name);
+            }
+        }
+    }
 
   return NULL_TREE;
 }