GCC, GDB v6 and -fomit-frame-pointer

[Jakub Jelinek]

On Thu, Oct 09, 2003 at 08:33:00AM -0400, Daniel Jacobowitz wrote:
> On Thu, Oct 09, 2003 at 10:43:22AM +0100, Alex Hornby wrote:
> > 
> > Does the new DWARF2 call frame in gdb 6.0 support mean programs compiled 
> > with GCC and -fomit-frame-pointer can now be debugged? That would be 
> > great as -fomit-frame-pointer provides quite a performance boost on x86.
> > 
> > Assuming this is possible, what GCC and binutils versions would be 
> > needed to take advantage of this?
> 
> In general yes.  Backtraces should work.  Ultra-accurate argument and
> local variable printing requires -fvar-tracking in GCC so it's a little
> flaky now, but unwinding should be fine.
> 
> Anything recent.  I think 3.2, 3.3 are fine.

Even without CFI info? With the exception of IA-64/AMD64, GCC doesn't
generate unwind info by default, only when -fasynchronous-unwind-tables.

	Jakub