On Tue, 30 Nov 2010 22:59:35 -0600 Stuart Stegall <kel...@keltor.org> wrote:
> On Mon, Nov 29, 2010 at 11:09 AM, David Jensen > <djensen...@windstream.net> wrote: > > Note: Section 5.10, “GCC-4.5.1 - Pass 2” does not use a case > > statement for the frame-pointer. Problematic for x86_64? Perhaps > > both sections should be: > > > > gdb on AMD64 uses stack unwind instead of the frame pointer. The > default on x86 is still to use the frame pointer. The frame pointer > is really unneeded unless you have a compiler that doesn't put enough > stack info into the binaries. > > http://www.yosefk.com/blog/getting-the-call-stack-without-a-frame-pointer.html > <<-- more than you ever wanted to know about the call stack, frame > pointers, and unwind. > > gcc-4.6 will make -fomit-frame-pointer the default on Linux/x86. a fedora thread on debugging/profiling issues at: http://lists.fedoraproject.org/pipermail/devel/2010-November/144952.html but I am not, and I don't believe most LFS users are interested in *system wide* debugging/profiling. Thus omitting the frame pointer generally is a plus. The point of the thread is that the 'chapter 5 gcc pass 2' and the 'chapter 6 gcc' instructions and explanations are inconsistent, confusing and wrong for all but i?86. Maybe even completely outdated. --- David Jensen -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
