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| author | Namhyung Kim <namhyung.kim@lge.com> | 2012-10-02 01:32:51 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-10-02 18:36:45 -0300 |
| commit | 4e34d9588b46f44a4dba718606913133f15e4b21 (patch) | |
| tree | 0b9d6f410d12a6695f20cef47f7ec1047a6e2958 /tools | |
| parent | 4d8061faca7a50010f037374410f0c3647c3ecf8 (diff) | |
| download | lwn-4e34d9588b46f44a4dba718606913133f15e4b21.tar.gz lwn-4e34d9588b46f44a4dba718606913133f15e4b21.zip | |
perf tools: Convert to BACKTRACE_SUPPORT
For building perf without stack backtrace debug, we can set
NO_BACKTRACE=1 as a argument of make. It then defines NO_BACKTRACE
macro for C code to do the proper handling. However it usually used in
a negative semantics - e.g. #ifndef - so we saw double negations which
can be misleading. Convert it to a positive form to make it more
readable and add _SUPPORT suffix for consistency.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Irina Tirdea <irina.tirdea@gmail.com>
Cc: Irina Tirdea <irina.tirdea@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349109171-1942-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Makefile | 10 | ||||
| -rw-r--r-- | tools/perf/util/util.c | 4 |
2 files changed, 7 insertions, 7 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 5216ade909d0..f9126f89efef 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -45,6 +45,8 @@ include config/utilities.mak # # Define NO_LIBUNWIND if you do not want libunwind dependency for dwarf # backtrace post unwind. +# +# Define NO_BACKTRACE if you do not want stack backtrace debug feature $(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE @$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT) @@ -749,11 +751,9 @@ ifndef NO_STRLCPY endif endif -ifdef NO_BACKTRACE - BASIC_CFLAGS += -DNO_BACKTRACE -else - ifneq ($(call try-cc,$(SOURCE_BACKTRACE),),y) - BASIC_CFLAGS += -DNO_BACKTRACE +ifndef NO_BACKTRACE + ifeq ($(call try-cc,$(SOURCE_BACKTRACE),),y) + BASIC_CFLAGS += -DBACKTRACE_SUPPORT endif endif diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 2055cf38041c..99664598bc1a 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -1,7 +1,7 @@ #include "../perf.h" #include "util.h" #include <sys/mman.h> -#ifndef NO_BACKTRACE +#ifdef BACKTRACE_SUPPORT #include <execinfo.h> #endif #include <stdio.h> @@ -165,7 +165,7 @@ size_t hex_width(u64 v) } /* Obtain a backtrace and print it to stdout. */ -#ifndef NO_BACKTRACE +#ifdef BACKTRACE_SUPPORT void dump_stack(void) { void *array[16]; |