On Tue, Nov 16, 2021 at 7:40 AM Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote: > > A report was made in https://github.com/acmel/dwarves/issues/26 about > pahole not being listed in the process/changes.rst file as being needed > for building the kernel, address that. > > Link: https://github.com/acmel/dwarves/issues/26 > Cc: Alexei Starovoitov <ast@xxxxxxxxxx> > Cc: Andrii Nakryiko <andrii@xxxxxxxxxx> > Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx> > Cc: Jiri Olsa <jolsa@xxxxxxxxxx> > Cc: Jonathan Corbet <corbet@xxxxxxx> > Cc: bpf@xxxxxxxxxxxxxxx > Cc: netdev@xxxxxxxxxxxxxxx > Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> > --- > Documentation/process/changes.rst | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst > index e35ab74a0f804b04..c45f167a1b6c02a4 100644 > --- a/Documentation/process/changes.rst > +++ b/Documentation/process/changes.rst > @@ -35,6 +35,7 @@ GNU make 3.81 make --version > binutils 2.23 ld -v > flex 2.5.35 flex --version > bison 2.0 bison --version > +pahole 1.16 pahole --version > util-linux 2.10o fdformat --version > kmod 13 depmod -V > e2fsprogs 1.41.4 e2fsck -V > @@ -108,6 +109,14 @@ Bison > Since Linux 4.16, the build system generates parsers > during build. This requires bison 2.0 or later. > > +pahole: > +------- > + > +Since Linux 5.2 the build system generates BTF (BPF Type Format) from DWARF in > +vmlinux, a bit later from kernel modules as well, if CONFIG_DEBUG_INFO_BTF is I'd probably emphasize a bit more that pahole is required only if CONFIG_DEBUG_INFO_BTF is selected by moving "If CONFIG_DEBUG_INFO_BTF is selected, " to the front. But either way looks good. Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx> > +selected. This requires pahole v1.16 or later. It is found in the 'dwarves' or > +'pahole' distro packages or from https://fedorapeople.org/~acme/dwarves/. > + > Perl > ---- > > -- > 2.31.1 >
