Re: Enable -fomit-frame-pointer on i386

[Jan Hubicka <hubicka at ucw dot cz>]

> Jan Hubicka writes:
>  > Hi,
>  > in the case we are taking seriuosly the switch to omitting frame pointer this
>  > time, I think we shall do it earlier than later.  This patch imitate what
>  > x86-64 does already so there shall not be too many showstoppers.
>  > I verified that with current CVS gdb I can debug without problems.
>  > (most of older GDBs segfaults when seeing location lists)
>  > 
>  > Bootstrapped/regtested i386, OK?
> 
> Does this break backtrace() in glibc?

Unforutnately yes, see my other mail.  I would suggest to simply copy
around the x86-64 backtrace implementation, I have it on my machine for
a while and it works.
The dependence in between libjava and glibc would be very anoying
tought.  Perhaps we can simply replace use of backtrace() in libjava by
the Jakub's unwind based implementation to break the dependency on
targets where unwind info shall be available (ia-64/x86-64/i386/s390 at
least)
I am just running the testsuite to see if and how many testsuite
regressions it will bring.

Honza
> 
> Andrew.