Re: [PATCH v2 bpf-next 06/13] kbuild,bpf: switch to using --btf_features for pahole v1.26 and later

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On 30/04/2024 00:43, Andrii Nakryiko wrote:
> On Wed, Apr 24, 2024 at 8:49 AM Alan Maguire <alan.maguire@xxxxxxxxxx> wrote:
>>
>> The btf_features list can be used for pahole v1.26 and later -
>> it is useful because if a feature is not yet implemented it will
>> not exit with a failure message.  This will allow us to add feature
>> requests to the pahole options without having to check pahole versions
>> in future; if the version of pahole supports the feature it will be
>> added.
>>
>> Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
>> ---
>>  scripts/Makefile.btf | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
> 
> post this patch separately? we can land it sooner, right?
> 
>

sure, will do!

>> diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf
>> index 82377e470aed..8e6a9d4b492e 100644
>> --- a/scripts/Makefile.btf
>> +++ b/scripts/Makefile.btf
>> @@ -12,8 +12,11 @@ pahole-flags-$(call test-ge, $(pahole-ver), 121)     += --btf_gen_floats
>>
>>  pahole-flags-$(call test-ge, $(pahole-ver), 122)       += -j
>>
>> -pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE)         += --lang_exclude=rust
>> -
>>  pahole-flags-$(call test-ge, $(pahole-ver), 125)       += --skip_encoding_btf_inconsistent_proto --btf_gen_optimized
>>
>> +# Switch to using --btf_features for v1.26 and later.
>> +pahole-flags-$(call test-ge, $(pahole-ver), 126)       = -j --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func
>> +
>> +pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE)         += --lang_exclude=rust
>> +
>>  export PAHOLE_FLAGS := $(pahole-flags-y)
>> --
>> 2.31.1
>>




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