Added __attribute__((deprecated)) patches.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@48743 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 31 insertions, 2 deletions

diff --git a/gcc/c-decl.c b/gcc/c-decl.c
index d6e8ac33469..206c7718ba1 100644
--- a/gcc/c-decl.c
+++ b/gcc/c-decl.c
@@ -439,6 +439,18 @@ int warn_multichar = 1;
 #endif
 int dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
 
+/* States indicating how grokdeclarator() should handle declspecs marked
+   with __attribute__((deprecated)).  An object declared as
+   __attribute__((deprecated)) suppresses warnings of uses of other
+   deprecated items.  */
+   
+enum deprecated_states {
+  DEPRECATED_NORMAL,
+  DEPRECATED_SUPPRESS
+};
+
+static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
+
 /* Decode the string P as a language-specific option for C.
    Return the number of strings consumed.  Should not complain
    if it does not recognise the option.  */
@@ -3420,9 +3432,18 @@ start_decl (declarator, declspecs, initialized, attributes)
      int initialized;
      tree attributes;
 {
-  tree decl = grokdeclarator (declarator, declspecs,
-			      NORMAL, initialized);
+  tree decl;
   tree tem;
+  
+  /* An object declared as __attribute__((deprecated)) suppresses
+     warnings of uses of other deprecated items.  */
+  if (lookup_attribute ("deprecated", attributes))
+    deprecated_state = DEPRECATED_SUPPRESS;
+
+  decl = grokdeclarator (declarator, declspecs,
+			 NORMAL, initialized);
+  
+  deprecated_state = DEPRECATED_NORMAL;
 
   if (warn_main > 0 && TREE_CODE (decl) != FUNCTION_DECL
       && MAIN_NAME_P (DECL_NAME (decl)))
@@ -4091,6 +4112,14 @@ grokdeclarator (declarator, declspecs, decl_context, initialized)
     {
       tree id = TREE_VALUE (spec);
 
+      /* If the entire declaration is itself tagged as deprecated then
+         suppress reports of deprecated items.  */
+      if (id && TREE_DEPRECATED (id))
+        {
+	  if (deprecated_state != DEPRECATED_SUPPRESS)
+	    warn_deprecated_use (id);
+        }
+
       if (id == ridpointers[(int) RID_INT])
 	explicit_int = 1;
       if (id == ridpointers[(int) RID_CHAR])