perf symbols: Fix builds with NO_LIBELF set

Build currently fails:
  $ make -C tools/perf O=/tmp/pbuild NO_LIBELF=1

  util/symbol.c: In function ‘dso__load’:
  util/symbol.c:1128:27: error: ‘struct symsrc’ has no member named ‘dynsym’
      CC /tmp/pbuild/util/pager.o
  make: *** [/tmp/pbuild/util/symbol.o] Error 1
  make: *** Waiting for unfinished jobs....

Moving the dynsym reference to symbol-elf.c reveals that NO_LIBELF requires
NO_LIBUNWIND:

  $ make -C tools/perf O=/tmp/pbuild NO_LIBELF=1

      LINK /tmp/pbuild/perf
  /tmp/pbuild/libperf.a(unwind.o): In function `elf_section_offset':
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:176: undefined reference to `elf_begin'
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:181: undefined reference to `gelf_getehdr'
  /tmp/pbuild/libperf.a(unwind.o): In function `elf_section_by_name':
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:157: undefined reference to `elf_nextscn'
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:160: undefined reference to `gelf_getshdr'
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:161: undefined reference to `elf_strptr'
  /tmp/pbuild/libperf.a(unwind.o): In function `elf_section_offset':
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:190: undefined reference to `elf_end'
  /tmp/pbuild/libperf.a(unwind.o): In function `read_unwind_spec':
  /opt/sw/ahern/perf.git/tools/perf/util/unwind.c:190: undefined reference to `elf_end'
  collect2: ld returned 1 exit status
  make: *** [/tmp/pbuild/perf] Error 1
  make: Leaving directory `/opt/sw/ahern/perf.git/tools/perf'

This patch fixes both.

Reviewed-by: Namhyung Kim <[email protected]>
Signed-off-by: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions