This either was never fixed or broke again, perf links neither against 
libunwind or libdw:
$ ldd /usr/lib/linux-tools/4.8.0-37-generic/perf 
        linux-vdso.so.1 =>  (0x00007ffee7766000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 
(0x00007efec8bb9000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007efec89b1000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007efec86a8000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007efec84a4000)
        libelf.so.1 => /usr/lib/x86_64-linux-gnu/libelf.so.1 
(0x00007efec828c000)
        libaudit.so.1 => /lib/x86_64-linux-gnu/libaudit.so.1 
(0x00007efec8062000)
        libslang.so.2 => /lib/x86_64-linux-gnu/libslang.so.2 
(0x00007efec7cd7000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007efec7abd000)
        liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007efec789a000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007efec74d3000)
        /lib64/ld-linux-x86-64.so.2 (0x0000564e0db72000)
        libcap-ng.so.0 => /lib/x86_64-linux-gnu/libcap-ng.so.0 
(0x00007efec72ce000)

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https://bugs.launchpad.net/bugs/1248289

Title:
  Missing libunwind support in perf

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