[PATCH 1/3] powerpc, Makefile: Make it possible to safely select CONFIG_FRAME_POINTER
segher at kernel.crashing.org
Sun May 3 05:48:08 EST 2009
> This patch introduces HAVE_NORMAL_FRAME_POINTER Kconfig symbol. When
> defined, the top level Makefile won't add -fno-omit-frame-pointer
> cflag (the flag is useless for PowerPC kernels, and also makes gcc
> generate wrong code).
> +++ b/arch/powerpc/Kconfig
> + select HAVE_NORMAL_FRAME_POINTER
> +config HAVE_NORMAL_FRAME_POINTER
> + bool
> + help
> + Architectures should select this symbol if their ABI implies
> + having a frame pointer.
I am totally confused what you call a frame pointer here.
None of the relevant PowerPC ABIs have a frame pointer
separate from the stack pointer; the compiler can create
one, of course. A better config symbol name and help text
would help understand this patch :-)
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