Bug#224200: gcc-3.3 fails to generate EH_FRAME program-header

[Matthias Klose <doko@cs.tu-berlin.de>]

gcc-3.3 is configured with --enable-sjlj-exceptions (done to keep
compatibility with gcc-3.2). I don't know if the dwarf2 unwinder will
work with this setup.

David Mosberger writes:
> Package: gcc-3.3
> Version: 1:3.3.3-0pre0
> Severity: important
> Tags: sid
> 
> It appears that the behavior of Debian gcc-3.3 is inconsistent with
> that of Red Hat's gcc-3.2 when -fexceptions is specified.  Example:
> 
> On Debian/testing:
> 
>  $ cat t.c
>  int main (int argc, char **argv) {
>         printf ("hello\n");
>  }
>  $ gcc-3.3 -fexceptions t.c
>  $ objdump --priv a.out |grep EH
>  (no output)
> 
> On Red Hat 9:
> 
>  $ cat t.c
>  int main (int argc, char **argv) {
>         printf ("hello\n");
>  }
>  $ gcc -fexceptions t.c
>  $ objdump --priv a.out |grep EH
>  EH_FRAME off    0x00000420 vaddr 0x08048420 paddr 0x08048420 align 2**2
> 
> I believe this is a serious problem because it means that a DWARF2
> unwinder will not be able to unwind across C code even though it was
> compiled with -fexceptions.