* perf linking error with NO_DWARF=1 and NO_LIBUNWIND=1
@ 2015-04-18 7:05 Vinson Lee
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From: Vinson Lee @ 2015-04-18 7:05 UTC (permalink / raw)
To: linux-perf-users
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
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