[PATCHES 0/2] Introduce --btf_features=+extra_features syntax

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Hi,

	Please take a look if you agree this is a more compact, less
confusing way of asking for the set of standard BTF features + some
extra features such as 'reproducible_build'.

	We have this in perf, for things like:

⬢[acme@toolbox pahole]$ perf report -h -F 

 Usage: perf report [<options>]

    -F, --fields <key[,keys...]>
                          output field(s): overhead period sample  overhead overhead_sys
                          overhead_us overhead_guest_sys overhead_guest_us overhead_children
                          sample period weight1 weight2 weight3 ins_lat retire_lat
                          p_stage_cyc pid comm dso symbol parent cpu socket
                          srcline srcfile local_weight weight transaction trace
                          symbol_size dso_size cgroup cgroup_id ipc_null time
                          code_page_size local_ins_lat ins_lat local_p_stage_cyc
                          p_stage_cyc addr local_retire_lat retire_lat simd
                          type typeoff symoff dso_from dso_to symbol_from symbol_to
                          mispredict abort in_tx cycles srcline_from srcline_to
                          ipc_lbr addr_from addr_to symbol_daddr dso_daddr locked
                          tlb mem snoop dcacheline symbol_iaddr phys_daddr data_page_size
                          blocked

⬢[acme@toolbox pahole]$

From the 'perf report' man page for '-F':

        If the keys starts with a prefix '+', then it will append the specified
        field(s) to the default field order. For example: perf report -F +period,sample.

- Arnaldo

Arnaldo Carvalho de Melo (2):
  pahole: Factor out routine to process "--btf_features=all"
  pahole: Allow asking for extra features using the '+' prefix in
    --btf_features

 man-pages/pahole.1          |  6 ++++++
 pahole.c                    | 23 ++++++++++++++++-------
 tests/reproducible_build.sh |  2 +-
 3 files changed, 23 insertions(+), 8 deletions(-)

-- 
2.44.0