From owner-freebsd-ports  Sat May 20 11:47:55 2000
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Date: Sat, 20 May 2000 11:47:34 -0700
From: Arun Sharma <adsharma@sharmas.dhs.org>
To: "David O'Brien" <obrien@freebsd.org>
Cc: kde-devel@kde.org, ports@freebsd.org
Subject: Re: C++ exception handling and non Linux platforms
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References: <20000519083947.A47819@sharmas.dhs.org> <20000520103959.A12924@dragon.nuxi.com>
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In-Reply-To: <20000520103959.A12924@dragon.nuxi.com>; from David O'Brien on Sat, May 20, 2000 at 10:39:59AM -0700
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On Sat, May 20, 2000 at 10:39:59AM -0700, David O'Brien wrote:
> On Fri, May 19, 2000 at 08:39:47AM -0700, Arun Sharma wrote:
> > Most non Linux platforms do not link in libgcc.a by default.
> 
> Uh... NO!  Try running ``cc -v'' sometimes on FreeBSD.  libgcc.a is a
> *REQUIRED* library to link against when using GCC.

I didn't express myself correctly in that sentence. Though libgcc.a is
linked by default, the symbols don't participate in dynamic linking.

With -Wl,-export-dynamic:

$ objdump -T .libs/konqueror | grep __eh
0804ad64 g    DF .text  00000022 __eh_alloc
0804ad88 g    DF .text  00000013 __eh_free
0804cf44 g    DF .text  00000042 __eh_rtime_match

and without -Wl,-export-dynamic:

$ objdump -T .libs/konqueror | grep __eh
08049338 g    DF .text  00000022 __eh_alloc     

> There is C++ exception handling code in Linux's glibc2, that I cannot
> fathom why they put it there.  I have a feeling your problems are the
> fault of the software you are trying to port.

I don't see any C++ exception handling symbols in Linux glibc2.

$ nm  /lib/libc.so.6  | grep eh
0005b8f0 t freehook
0005c0e0 t tr_freehook

	-Arun


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