[Toybox] perf(1)

[stephen Turner]

On Thu, Mar 12, 2015 at 5:34 PM, enh <enh at google.com> wrote:

> thanks. i did see the recent elftoolchain discussion here but didn't
> realize that they were API compatible with the existing elfutils. i've
> raised bugs internally for people to look at switching one of our
> build tools over, and to consider this when the time comes to write a
> perf that can build with clang and run on all three platforms.
>
>
Maybe i missed it, who is switching over? im assuming your referring to a
distribution?


> On Thu, Mar 12, 2015 at 6:09 AM, stephen Turner
> <stephen.n.turner at gmail.com> wrote:
> >
> > On Mar 12, 2015 2:30 AM, "Daniel Cegiełka" <daniel.cegielka at gmail.com>
> > wrote:
> >>
> >> Hi Elliott,
> >>
> >> 2015-03-12 7:09 GMT+01:00 enh <enh at google.com>:
> >> > oh, i had a suggestion for the roadmap... perf(1). there are two or
> >> > three problems with perf, all of which are the kind of problems that
> >> > people on this list are likely to be interested in:
> >> >
> >> > 1. perf itself is GPL.
> >> > 2. perf uses elfutils (libelf), which is GPL.
> >> > 3. you can't compile elfutils with clang. (heavy use of nested
> >> > functions, a GCC extension clang doesn't support. the elfutils guys
> >> > seem to be vehemently against fixing that. but then these are people
> >> > who use strndupa...)
> >>
> >> point 2 and 3?
> >>
> >> https://github.com/elftoolchain/elftoolchain/tree/master/libelf
> >>
> >> Best regards,
> >> Daniel
> >>
> >>
> >
> > Not sure if its worth the mention but they recently had a discussion (or
> get
> > trolled?) About the trademark/license of the name libelf as well.
> However it
> > didnt appear that the person making the arguement was in any legal
> position
> > to act nor was he representing someone who could.
> >
> > Its a quiet but responsive list should you have any questions. The
> origional
> > main branch is on sf. The git hubs are apparently devs without commit
> access
> > keeping up with patches etc. As the main sf branch appears to be slow to
> > update? Hopefully that will change.
> >
> > Stephen
> >
> >> >
> >> > point 3 is the one that's going to cause problems because it's one of
> >> > a very small number of projects in the entire tree that can't be built
> >> > with clang, and it's the only thing in the tree where fixing it would
> >> > be a major change *and* the upstream owners are actively against the
> >> > change.
> >> >
> >> > i suspect at some point Android will end up writing a Java
> >> > implementation of perf (because most third party app developers use
> >> > Windows), but a native implementation that also worked on Mac OS and
> >> > WIndows might still be something Android could use directly in the
> >> > IDE. but even something Linux-only would still be useful for platform
> >> > developers, and could replace the existing implementation.
> >> >
> >> > (i see people here talk about big things like linkers and compilers
> >> > and can't help but think of the smaller things i don't currently have
> >> > a good option for :-) )
> >> >
> >> >  --elliott
> >> > _______________________________________________
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> >> _______________________________________________
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>
>
>
> --
> Elliott Hughes - http://who/enh - http://jessies.org/~enh/
> Android native code/tools questions? Mail me/drop by/add me as a reviewer.
>
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