c++/7327: -isystem and template linkage

[Berthold Höllmann]

neil@gcc.gnu.org writes:

> Old Synopsis: strange error through using -isystem
> New Synopsis: -isystem and template linkage
> 
> State-Changed-From-To: open->analyzed
> State-Changed-By: neil
> State-Changed-When: Tue Aug 13 04:12:48 2002
> State-Changed-Why:
>     One way gives your headers extern "C" wrappers, the other
>     doesn't.  I'm not sure what the fix is, or even if it should be
fixed.
> 
>
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=g
cc&pr=7327
> 

If I generate the preprocessed files using

   g++ -E -isystem /home/hoel/work/boost/boost err.cxx -o erra

and

   g++ -E -I /home/hoel/work/boost/boost err.cxx -o errb

and call 

   diff err? | grep -v "^[<>] #" | grep -v "\---"

afterwards, the only output are the different lines. So why are the
C++ lines wrapped extern "C" using -isystem but not using -I? I'm also
not sure what the fix is, but shure it should be fixed.

Greetings

Berthold
-- 
Dipl.-Ing. Berthold Höllmann   __   Address:
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