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| author | Ingo Molnar <mingo@kernel.org> | 2013-11-14 08:25:24 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-11-14 18:00:45 +0100 |
| commit | e310718d0e83aeb9969264dc577c45db16d9104d (patch) | |
| tree | 256a30b7c8ba274c933b049e577e3f778ca6109d /tools/perf/config/Makefile | |
| parent | bb4c5500c9c5b809696eee212843e731721a6e15 (diff) | |
| download | linux-e310718d0e83aeb9969264dc577c45db16d9104d.tar.gz linux-e310718d0e83aeb9969264dc577c45db16d9104d.tar.bz2 linux-e310718d0e83aeb9969264dc577c45db16d9104d.zip | |
tools/perf/build: Fix feature-libunwind-debug-frame handling
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 <will.deacon@arm.com>
Tested-by: Jean Pihet <jean.pihet@linaro.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-scsoctqzmou3rpkixCHezy9e@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/config/Makefile')
| -rw-r--r-- | tools/perf/config/Makefile | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 861379ec7632..f7d11a811c74 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -329,8 +329,14 @@ ifndef NO_LIBUNWIND msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 1.1); NO_LIBUNWIND := 1 else - ifneq ($(feature-libunwind-debug-frame), 1) - msg := $(warning No debug_frame support found in libunwind); + ifeq ($(ARCH),arm) + $(call feature_check,libunwind-debug-frame) + ifneq ($(feature-libunwind-debug-frame), 1) + msg := $(warning No debug_frame support found in libunwind); + CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME + endif + else + # non-ARM has no dwarf_find_debug_frame() function: CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME endif endif |