Re: [PATCH] basic perf support for sparc

[Arnaldo Carvalho de Melo <acme@redhat.com>]

Em Sat, Aug 01, 2009 at 10:20:48AM +0200, Jens Axboe escreveu:
> On Sat, Aug 01 2009, Anton Blanchard wrote:
> > 
> > Hi,
> > 
> > > > Building the perf tool is somewhat involved on sparc64
> > > > though, since 64-bit versions of zlib/libelf/bfd aren't
> > > > directly available (at least on debian 5.x). But once you
> > > > get there, it runs :-). Would it be easier/functional
> > > > to build 32-bit userland perf instead?
> > > 
> > > Same is true on ppc64, btw. How are others handling this?
> > 
> > The requirement for libz was removed, so up until recently we only needed
> > a 64bit version of elfutils which is easy to build.
> > 
> > It looks like we now have a requirement on binutils which is considerably
> > more painful to build. One option is to make the bfd requirement optional, all
> > you lose would be the ability to see c++ demangled names I think.
> 
> Right, binutils is the ugly one. I got a libbfd.so built for both ppc
> and sparc, but it wasn't just a make && make install job. Personally I
> could not care less about losing c++ demangled name support, so that
> approach sounds fine to me :-)

Exactly, for a huge number of developers not being able to see demangled
C++ is okay, so I agree on adding smarts to not demangle when
binutils-devel is not available.

I thought about extracting the demangling bits out of binutils, ran away
screaming. I also hoped elfutils would have that by now, but it doesn't.

- Arnaldo