c++/1571: g++ is confused with by code that typedef's wchar_t.

[cgd at sibyte dot com]

>Number:         1571
>Category:       c++
>Synopsis:       g++ is confused with by code that typedef's wchar_t.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 05 17:46:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     cgd@sibyte.com (Chris Demetriou)
>Release:        gcc version 2.97 20010102 (experimental), and thereabouts.
>Organization:
>Environment:
gcc version 2.97 20010102 (experimental) on sparc-solaris native,
gcc version 2.97 20010102 (experimental) on sparc-solaris targetting mips-elf,
gcc version 2.97 20010103 (experimental) on the codesourcery gcc test web page at http://www.codesourcery.com/gcc-compile.shtml.
>Description:
g++ seems to to mishandle code which typedef's wchar_t,
emitting an error when none is appropriate.

in particular, code like:

	typedef int wchar_t;

when compiled with g++ produces an error like:

foo.cc:1: declaration does not declare anything


This problem was also reported in the message:

	http://gcc.gnu.org/ml/gcc-bugs/2000-12/msg00516.html

(that message includes an indication of where the problem
was likely introduced, but I did not attempt to verify it).
I ran into it on my own, compiling NetBSD code.
(Several of NetBSD's headers typedef wchar_t as
appropriate.)
>How-To-Repeat:
cat > foo.cc << __EOF__
typedef int wchar_t;
__EOF__
g++ foo.cc

notice the error message:

foo.cc:1: declaration does not declare anything
>Fix:
Unknown.  I couldn't find a workaround, either.  (I tried
-ffreestanding, -fno-builtin... didn't know what else
to try.  Apparent lack of workaround might make it
reasonable to mark this bug critical, but I wasn't sure,
so i only made it "serious.")
>Release-Note:
>Audit-Trail:
>Unformatted: