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: > > case `uname -m` in > i?86 | x86_64) sed -i 's/^T_CFLAGS =$/& -fomit-frame-pointer/' \ > gcc/Makefile.in ;; > esac > > > --- > David Jensen > > -- > http://linuxfromscratch.org/mailman/listinfo/lfs-dev > FAQ: http://www.linuxfromscratch.org/faq/ > Unsubscribe: See the above information page >
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. -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
