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Date: Fri, 15 Jun 2001 10:30:34 +1000 (EST)
From: =?iso-8859-1?q?Danny=20Smith?= <danny_r_smith_2001 AT yahoo DOT co DOT nz>
Subject: RE: Issue calling Com function(s)
To: Paul K Gleske <pkg AT gleske DOT org>, cygwin AT cygwin DOT com
In-Reply-To: <NCBBLNOKDKEGJLPOBEJDIEPJGHAA.pkg@gleske.org>
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--- Paul K Gleske <pkg AT gleske DOT org> wrote: > Slight goof on that post. 
The make file I posted didn't have
> everything set
> (it was missing the -lole32 flag to the link).  Here is the correct
> makefile:
> 
> -----------------
> makefile
> -----------------
> .PHONY: clean all
> 
> istreamtest.exe : istreamtest.obj
> 	gcc -o istreamtest.exe -mwindows -mno-cygwin -lole32 istreamtest.obj
> 

-lole32must follow istreamtest.obj 


[snip]

> 
> Thanks for the link to the description of -fvtable-thunk.  However, I
> don't
> think it helps me to understand how/when it should be used.  There is
> the
> comment that all libs must be re-compiled including libgcc.a.  How do
> I do
> that?  Is it really necessary? 

Yes, if you are going to use C++ exception handling (in libgcc.a) or
any classes/functions from libstdc++.a. In your testcase, you didn't. 

Also any other support C++ libs must be built with same setting.

I hope to have  vtable-thunk versions of libstdc++.a, libgcc.a and
_G_config.h uploaded to mingw file release page this weekend.  They
will of course only be useful to you if you are using -mno-cygwin (or
mingw) 

Danny

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