Re: g++ build failure (Was: C++ PATCH: PR 12735)

[Richard Earnshaw <rearnsha at arm dot com>]

> On Thu, 13 Nov 2003, Joern Rennecke wrote:
> 
> > exists in c99, it is not compatible with any pointer type, and
> > thus assigning a union tree_node * to ok is a constraint violation
> > of 6.5.16.1 .
> 
> The last case of 6.5.16.1#1 ("the left operand has type _Bool and the
> right is a pointer") is the one that applies.
> 
> But the requirement for cross-compilers to build with 2.95 means we can't
> use this (or other properties of _Bool that distinguish it from other
> integer types) in GCC.
> 

Indeed.  However, in this case the patch is trivial.  Just change the 
declaration of ok to a tree and we can use an implicit NULL check.

I'm just testing with this change:

Attachment: decl.patch
Description: decl.patch