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Date: Thu, 4 Oct 2012 15:08:03 -0300
From: Arnaldo Carvalho de Melo <acme@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung.kim@....com>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 03/42] perf tools: Convert to LIBELF_SUPPORT
From: Namhyung Kim <namhyung.kim@....com>
For building perf without libelf, we can set NO_LIBELF=1 as a argument
of make. It then defines NO_LIBELF_SUPPORT 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.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1348824728-14025-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/Makefile | 7 +++----
tools/perf/builtin-inject.c | 2 +-
tools/perf/perf.c | 2 +-
tools/perf/util/generate-cmdlist.sh | 4 ++--
tools/perf/util/map.c | 2 +-
tools/perf/util/symbol.h | 10 +++++-----
6 files changed, 13 insertions(+), 14 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 9cd4913..1df0917 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -503,8 +503,6 @@ ifneq ($(OUTPUT),)
endif
ifdef NO_LIBELF
-BASIC_CFLAGS += -DNO_LIBELF_SUPPORT
-
EXTLIBS := $(filter-out -lelf,$(EXTLIBS))
# Remove ELF/DWARF dependent codes
@@ -519,9 +517,10 @@ BUILTIN_OBJS := $(filter-out $(OUTPUT)builtin-probe.o,$(BUILTIN_OBJS))
LIB_OBJS += $(OUTPUT)util/symbol-minimal.o
else # NO_LIBELF
+BASIC_CFLAGS += -DLIBELF_SUPPORT
-ifneq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON)),y)
- BASIC_CFLAGS += -DLIBELF_NO_MMAP
+ifeq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON)),y)
+ BASIC_CFLAGS += -DLIBELF_MMAP
endif
ifndef NO_DWARF
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 1eaa661..b5ab084 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -194,7 +194,7 @@ static int perf_event__inject_buildid(struct perf_tool *tool,
* account this as unresolved.
*/
} else {
-#ifndef NO_LIBELF_SUPPORT
+#ifdef LIBELF_SUPPORT
pr_warning("no symbols found in %s, maybe "
"install a debug package?\n",
al.map->dso->long_name);
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index fc2f770..dacae4b 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -48,7 +48,7 @@ static struct cmd_struct commands[] = {
{ "version", cmd_version, 0 },
{ "script", cmd_script, 0 },
{ "sched", cmd_sched, 0 },
-#ifndef NO_LIBELF_SUPPORT
+#ifdef LIBELF_SUPPORT
{ "probe", cmd_probe, 0 },
#endif
{ "kmem", cmd_kmem, 0 },
diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
index 389590c..3ac3803 100755
--- a/tools/perf/util/generate-cmdlist.sh
+++ b/tools/perf/util/generate-cmdlist.sh
@@ -22,7 +22,7 @@ do
}' "Documentation/perf-$cmd.txt"
done
-echo "#ifndef NO_LIBELF_SUPPORT"
+echo "#ifdef LIBELF_SUPPORT"
sed -n -e 's/^perf-\([^ ]*\)[ ].* full.*/\1/p' command-list.txt |
sort |
while read cmd
@@ -35,5 +35,5 @@ do
p
}' "Documentation/perf-$cmd.txt"
done
-echo "#endif /* NO_LIBELF_SUPPORT */"
+echo "#endif /* LIBELF_SUPPORT */"
echo "};"
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index ead5316..6109fa4 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -162,7 +162,7 @@ int map__load(struct map *self, symbol_filter_t filter)
pr_warning(", continuing without symbols\n");
return -1;
} else if (nr == 0) {
-#ifndef NO_LIBELF_SUPPORT
+#ifdef LIBELF_SUPPORT
const size_t len = strlen(name);
const size_t real_len = len - sizeof(DSO__DELETED);
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index b441b07..8b6ef7f 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -12,7 +12,7 @@
#include <byteswap.h>
#include <libgen.h>
-#ifndef NO_LIBELF_SUPPORT
+#ifdef LIBELF_SUPPORT
#include <libelf.h>
#include <gelf.h>
#include <elf.h>
@@ -46,10 +46,10 @@ char *strxfrchar(char *s, char from, char to);
* libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
* for newer versions we can use mmap to reduce memory usage:
*/
-#ifdef LIBELF_NO_MMAP
-# define PERF_ELF_C_READ_MMAP ELF_C_READ
-#else
+#ifdef LIBELF_MMAP
# define PERF_ELF_C_READ_MMAP ELF_C_READ_MMAP
+#else
+# define PERF_ELF_C_READ_MMAP ELF_C_READ
#endif
#ifndef DMGL_PARAMS
@@ -233,7 +233,7 @@ struct symsrc {
int fd;
enum dso_binary_type type;
-#ifndef NO_LIBELF_SUPPORT
+#ifdef LIBELF_SUPPORT
Elf *elf;
GElf_Ehdr ehdr;
--
1.7.1
--
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