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Ingo Molnar
e310718d0e
Set feature-libunwind-debug-frame. We don't want it in
CORE_FEATURE_TESTS because it's not the generic case, but we
need to set it in the !feature-libunwind case.
Also, because x86 distributions typically don't have
dwarf_find_debug_frame() unwinding method:
test-libunwind-debug-frame.c:(.text+0x31): undefined reference to `_Ux86_64_dwarf_find_debug_frame'
Restrict this new API to ARM for the time being.
With this patch test-all.c works again, so repeat perf builds
are fast again:
comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/
[...]
0,452899660 seconds time elapsed ( +- 0,11% )
While with before it was:
comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/
[...]
1,674001829 seconds time elapsed ( +- 0,16% )
[ Includes fix to config/feature-checks/Makefile from Will Deacon. ]
Tested-by: Will Deacon <[email protected]>
Tested-by: Jean Pihet <[email protected]>
Cc: Russell King <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>