From: Vinson Lee <vlee@twopensource.com>
To: linux-perf-users@vger.kernel.org
Subject: perf linking error with NO_DWARF=1 and NO_LIBUNWIND=1
Date: Sat, 18 Apr 2015 00:05:39 -0700 [thread overview]
Message-ID: <CAHTgTXVqzwcP39PqwaLNUFSdc-q_fk6cWEdfGQoNzqsGu9Qb8g@mail.gmail.com> (raw)
I build perf with NO_DWARF=1 and my spec file does not require libunwind-devel.
With this combination I see perf linking errors such as the following.
LINK perf
libperf.a(unwind-libdw.o): In function `libdw__arch_set_initial_registers':
tools/perf/arch/x86/util/unwind-libdw.c:50: undefined reference to
`dwfl_thread_state_registers'
This linking error was introduced with commit
0a4f2b6a3ba5066947a8cbd7cfa26fb8a9280625 "perf tools: Setup default
dwarf post unwinder" in Linux 3.15-rc1.
The above error can also be reproduced with this command line.
make -C tools/perf NO_DWARF=1 NO_LIBUNWIND=1
Cheers,
Vinson
reply other threads:[~2015-04-18 7:05 UTC|newest]
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