* decl2.c (lang_decode_option): Add support for -Wunknown-pragmas.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17167 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 8899897..83b0b69 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,7 @@
+Sun Dec 21 15:59:00 1997  Nick Clifton  <nickc@cygnus.com>
+
+       * decl2.c (lang_decode_option): Add support for -Wunknown-pragmas.
+
 Thu Dec 18 14:51:50 1997  Mark Mitchell  <mmitchell@usa.net>
 
        * pt.c (coerce_template_parms): Make sure to digest_init if

diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c
index 8b5134a..71648e1 100644 (file)
--- a/gcc/cp/decl2.c
+++ b/gcc/cp/decl2.c
@@ -272,6 +272,10 @@ int warn_sign_promo;
 
 int warn_old_style_cast;
 
+/* Warn about #pragma directives that are not recognised.  */      
+
+int warn_unknown_pragmas = 0; /* Tri state variable.  */  
+
 /* Nonzero means `$' can be in an identifier.  */
 
 #ifndef DOLLARS_IN_IDENTIFIERS
@@ -654,6 +658,10 @@ lang_decode_option (p)
        warn_sign_promo = setting;
       else if (!strcmp (p, "old-style-cast"))
        warn_old_style_cast = setting;
+      else if (!strcmp (p, "unknown-pragmas"))
+       /* Set to greater than 1, so that even unknown pragmas in
+          system headers will be warned about.  */  
+       warn_unknown_pragmas = setting * 2;
       else if (!strcmp (p, "comment"))
        ;                       /* cpp handles this one.  */
       else if (!strcmp (p, "comments"))
@@ -683,6 +691,9 @@ lang_decode_option (p)
          warn_template_debugging = setting;
          warn_reorder = setting;
          warn_sign_promo = setting;
+         /* Only warn about unknown pragmas that are not in system
+            headers.  */                                        
+         warn_unknown_pragmas = 1;                  
        }
 
       else if (!strcmp (p, "overloaded-virtual"))