From kde-devel  Sat Jun 16 18:15:02 2001
From: Matthias Posseldt <matthi () gmx ! li>
Date: Sat, 16 Jun 2001 18:15:02 +0000
To: kde-devel
Subject: gcc's atexit problem (Re: Problems with qt-copy in CVS)
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On Saturday 16 June 2001 13:14, Thorsten Schnebeck wrote:

> Am Samstag, 16. Juni 2001 12:56 schrieb Nils Holland:
> [...]
>
> > /usr/X11R6/lib/libX11.so.6: undefined reference to `atexit'
> > collect2: ld returned 1 exit status
> > make[4]: *** [aclock] Error 1
>
> Hmm, this seems to be the problem mentioned in
>
> http://lists.kde.org/?l=3Dkde-devel&m=3D99264135212831&w=3D2
>
> For some unknown reasons I don't have these problems here (so far:) usi=
ng
> gcc-2.95.3 and glib-2.2.2 too.

After some investigation I found the problem that occurs with the followi=
ng=20
versions:

gcc 2.95.3
glibc 2.2.3

Due to a bug in the compiler/linker/I don't know the linker sometimes doe=
sn't=20
link against libc.so.6 which is a text file with the content "GROUP=20
(/lib/libc-2.2.3.so /lib/libc_unshared.a)", but directly to=20
/lib/libc-2.2.3.so. But only in the nonshared file there is a function=20
'atexit' (also fstat, etc.). So sometimes if you link a program to a libr=
ary=20
linked incorrectly the "Undefined reference to 'atexit'" occurs.

On the gcc mailing list there is a patch, I attached it for convenience=20
(searched some time for it myself).

After patching and rebuilding your gcc 2.95.3, you have to recompile your=
=20
XFree86 (if you have the error described), then you can compile qt-2.3.1 =
and=20
no more "Undefined references to 'atexit'".

Ciao, Matthias
--=20

Go Open Source and build software that doesn't crash even when it's hit
       by an U.S. Navy submarine piloted by rich civilians.

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