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Re: import changes from gcc-in-cxx branch

On Friday 15 May 2009 09:43:36 pm Brad Hards wrote:
> Attached is a patch that improves C++ compatibility, to allow
> dehydra/treehydra to build against trunk.
Ian committed a patch (see  -Wc++-compat warn about typedef/tag conflict mail) 
that covers most of this. Here is an updated patch.

>  I didn't actually write it - I just hand-ported bits over from the
> gcc-in-cxx branch.
> 2009-05-15  Brad Hards  <>
> 	* system.h: Add C++ compatible CONST_CAST2 definition

--- system.h    (revision 147608)
+++ system.h    (working copy)
@@ -785,7 +785,9 @@
    context.  (This can be somewhat dangerous as these assumptions can
    change after the fact).  Beyond these uses, most other cases of
    using this macro should be viewed with extreme caution.  */
+#ifdef __cplusplus
+#define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
 #if defined(__GNUC__) && GCC_VERSION > 4000
 /* GCC 4.0.x has a bug where it may ICE on this expression,
    so does GCC 3.4.x (PR17436).  */
@@ -793,6 +795,7 @@
 #define CONST_CAST_TREE(X) CONST_CAST(union tree_node *, (X))
 #define CONST_CAST_RTX(X) CONST_CAST(struct rtx_def *, (X))

Can this please be applied?


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