Bug#148651: gcc 3.1-2 patch breaks binutils builds

[martin@v.loewis.de (Martin v. Loewis)]

"H . J . Lu" <hjl@lucon.org> writes:

> > The patch, in itself, is correct. Applications that want to conform to
> > the C++ ABI *must* use __cxa_atexit. It is not the default in g++
> > since not all C libraries support __cxa_atexit. However, GNU libc does
> > support this function, so Debian (and all other distributions) need to
> > activate it.
> > 
> 
> However, atexit in glibc conforms to the C++ ABI. There is no need for
> gcc to use __cxa_atexit on glibc.

There is a need for the -fuse-cxa-atexit option on glibc, since g++
will never register global dtors with atexit; it will only register
them with __cxa_atexit (if flag_use_cxa_atexit is true). It is easy to
demonstrate that the compiler does not work correctly if
-fno-use-cxa-atexit is used.

Regards,
Martin


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