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Date: Mon, 10 Aug 2015 11:57:02 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@redhat.com>, linux-kernel@vger.kernel.org,
        Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH] perf, tools: Support static linking with libdw
Message-ID: <20150810145702.GB20967@kernel.org>
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 <20150808164219.GD1747@two.firstfloor.org>
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Em Sat, Aug 08, 2015 at 06:42:19PM +0200, Andi Kleen escreveu:
> > please also update the warning, as now it's not obvious you need
> > to install also bz2 libs (bzip2-devel on Fedora) for dwarf support..
> > we already have check for lzma
> 
> The package should already pull it in as a dependency.

Noticed that this regresses my environment, Fedora 21:

  [acme@zoo linux]$ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ; m
  make: Entering directory '/home/git/linux/tools/perf'
    BUILD:   Doing 'make -j4' parallel build

  Auto-detecting system features:
  ...                         dwarf: [ OFF ]
  ...                         glibc: [ on  ]
  ...                          gtk2: [ on  ]
  ...                      libaudit: [ on  ]
  ...                        libbfd: [ on  ]
  ...                        libelf: [ on  ]
  ...                       libnuma: [ on  ]
  ...                       libperl: [ on  ]
  ...                     libpython: [ on  ]
  ...                      libslang: [ on  ]
  ...                     libunwind: [ on  ]
  ...            libdw-dwarf-unwind: [ on  ]
  ...                          zlib: [ on  ]
  ...                          lzma: [ on  ]

  config/Makefile:267: No libdw.h found or old libdw.h found or elfutils
  is older than 0.138, disables dwarf support. Please install new
  elfutils-devel/libdw-dev
    MKDIR    /tmp/build/perf/util/

Have not investigated, just noticed that dwarf is disabled if this patch
is applied, removing it for now, will check later.

- Arnaldo