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Re: C++ Link Errors
- From: "Gerrit P. Haase" <gp at familiehaase dot de>
- To: "Parker, Ron" <rdparker at butlermfg dot com>
- Cc: cygwin at cygwin dot com
- Date: Fri, 4 Jan 2002 17:41:45 +0100
- Subject: Re: C++ Link Errors
- Organization: Esse keine toten Tiere
- References: <E94FF01DFF6CD31186F4080009DC361503F83DF3@nttwr2.tower.bldgs.butlermfg.org>
- Reply-to: "Gerrit P. Haase @ cygwin" <cygwin at cygwin dot com>
Hallo Ron,
Am 2002-01-03 um 18:51 schriebst du:
> I am trying to build the Linux UML modeler with cygwin. Everything works
> until I link. Libtool tries adding -ldl to the g++ linking call. If I enter
> g++ command by hand without the -ldl everything is fine, except I get a
> number of C++ related linking errors.
> My command line is:
> g++ -Wl,--enable-auto-import -ftemplate-depth-99 -O2 -o uml.exe
[...]
> After a number of auto-import warnings, which I expect, like:
> Warning: resolving QString::shared_null by linking to
> __imp___7QString$shared_null (auto-import)
> I receive a series of messages, which I don't expect, like:
> umlview.o(.text+0x34f5):umlview.cpp: undefined reference to `cerr'
> umlview.o(.text+0x34fa):umlview.cpp: undefined reference to
> `ostream::_ls(char const *)'
> umlview.o(.text+0x3506):umlview.cpp: undefined reference to `endl(ostream &)
> '
> Any ideas?
cerr et al. are in libstdc++.a
Add libstdc++.a to the link line. Libtool uses gcc to link not g++,
i guess it is a bug in libtool, though if you use g++ like shown above
libstdc++ should be linked in automatically.
Gerrit
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