c++/7327: -isystem and template linkage

[Berthold Höllmann]

The following reply was made to PR c++/7327; it has been noted by GNATS.

From: =?ISO-8859-15?Q?Berthold_H=F6llmann?= <hoel@germanlloyd.org>
To: <neil@gcc.gnu.org>
Cc: <gcc-bugs@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-gnats@gcc.gnu.org>
Subject: Re: c++/7327: -isystem and template linkage
Date: 13 Aug 2002 13:52:50 +0200

 neil@gcc.gnu.org writes:
 
 > Old Synopsis: strange error through using -isystem
 > New Synopsis: -isystem and template linkage
 >=20
 > 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.
 >=20
 >
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&database=3D=
 g
 cc&pr=3D7327
 >=20
 
 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=20
 
    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
 --=20
 Dipl.-Ing. Berthold H=F6llmann   __   Address:
 hoel@germanlloyd.org        G /  \ L Germanischer Lloyd
 phone: +49-40-36149-7374    -+----+- Vorsetzen 32/35    P.O.Box 111606
 fax  : +49-40-36149-7320      \__/   D-20459 Hamburg    D-20416 Hamburg
 
 
 
 This email contains confidential information for the exclusive attention
 of the intended addressee. Any access of third parties to this email is
 unauthorized. Any use of this email by not intended recipients like
 copying, distribution, disclosure etc. is prohibited and may be
 unlawful. When addressed to our clients the content of this email is
 subject to the General Terms and Conditions of GL's Group of Companies
 applicable at the date of this email.=20
 
 GL's Group of Companies does not warrant and/or guarantee that this
 message at the moment of receipt is authentic, correct and its
 communication free of errors, interruption etc.=20