Victor Wren wrote:
Currently the book instructions in SVN aren't quite adequate to deal with
the 4.14.12 kernel, as-shipped. The default configuration sets
"CONFIG_UNWINDER_ORC=y" which requires elflib to compile. Using "make
menuconfig," the only option seems to be selecting between ORC unwinder,
and frame pointers, which promises at least a 5%-10% slowdown and
increased file-size in the kernel (ORC is the default).
I just rebuilt an entire LFS/BLFS system and did not notice any slowdown
for system use or build times when using frame pointers. We do have a
note on kernel config to set:
Kernel hacking --->
Choose kernel unwinder (Frame pointer unwinder)
That said, we will consider adding elfutils to LFS.
-- Bruce
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