Commit-ID:  4d29089c2b70ffeb61656ffd1b9c9c52602ddd44
Gitweb:     http://git.kernel.org/tip/4d29089c2b70ffeb61656ffd1b9c9c52602ddd44
Author:     Namhyung Kim <namhyung....@lge.com>
AuthorDate: Thu, 27 Sep 2012 20:23:38 +0900
Committer:  Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Thu, 27 Sep 2012 10:56:40 -0300

perf tools: Check libaudit availability for perf-trace builtin

The newly added trace command requires an external audit library.

However it can cause a build error because it's not checked whether the
libaudit is installed on system:

    CC builtin-trace.o
  builtin-trace.c:7:22: fatal error: libaudit.h: No such file or directory
  compilation terminated.
  make: *** [builtin-trace.o] Error 1

Signed-off-by: Namhyung Kim <namhy...@kernel.org>
Cc: David Ahern <dsah...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Link: 
http://lkml.kernel.org/r/1348745018-21744-1-git-send-email-namhy...@kernel.org
[ committer note: Added ", disables 'trace tool' to the feature warning msg ]
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/Makefile                 |   16 ++++++++++++++--
 tools/perf/config/feature-tests.mak |   11 +++++++++++
 tools/perf/perf.c                   |    2 ++
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 6958ba4..e5e71e7 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -102,7 +102,7 @@ ifdef PARSER_DEBUG
 endif
 
 CFLAGS = -fno-omit-frame-pointer -ggdb3 -funwind-tables -Wall -Wextra 
-std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) $(EXTRA_WARNINGS) 
$(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
-EXTLIBS = -lpthread -lrt -lelf -lm -laudit
+EXTLIBS = -lpthread -lrt -lelf -lm
 ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 
-D_GNU_SOURCE
 ALL_LDFLAGS = $(LDFLAGS)
 STRIP ?= strip
@@ -442,7 +442,6 @@ BUILTIN_OBJS += $(OUTPUT)builtin-kmem.o
 BUILTIN_OBJS += $(OUTPUT)builtin-lock.o
 BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o
 BUILTIN_OBJS += $(OUTPUT)builtin-test.o
-BUILTIN_OBJS += $(OUTPUT)builtin-trace.o
 BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
 
 PERFLIBS = $(LIB_FILE) $(LIBTRACEEVENT)
@@ -560,6 +559,19 @@ else
        LIB_OBJS += $(OUTPUT)util/unwind.o
 endif
 
+ifdef NO_LIBAUDIT
+       BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
+else
+       FLAGS_LIBAUDIT = $(ALL_CFLAGS) $(ALL_LDFLAGS) -laudit
+       ifneq ($(call try-cc,$(SOURCE_LIBAUDIT),$(FLAGS_LIBAUDIT)),y)
+               msg := $(warning No libaudit.h found, disables 'trace' tool, 
please install audit-libs-devel or libaudit-dev);
+               BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
+       else
+               BUILTIN_OBJS += $(OUTPUT)builtin-trace.o
+               EXTLIBS += -laudit
+       endif
+endif
+
 ifdef NO_NEWT
        BASIC_CFLAGS += -DNO_NEWT_SUPPORT
 else
diff --git a/tools/perf/config/feature-tests.mak 
b/tools/perf/config/feature-tests.mak
index 116690a..4add41b 100644
--- a/tools/perf/config/feature-tests.mak
+++ b/tools/perf/config/feature-tests.mak
@@ -193,3 +193,14 @@ int main(void)
 }
 endef
 endif
+
+ifndef NO_LIBAUDIT
+define SOURCE_LIBAUDIT
+#include <libaudit.h>
+
+int main(void)
+{
+       return audit_open();
+}
+endef
+endif
\ No newline at end of file
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 3fb052c..fc2f770 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -55,7 +55,9 @@ static struct cmd_struct commands[] = {
        { "lock",       cmd_lock,       0 },
        { "kvm",        cmd_kvm,        0 },
        { "test",       cmd_test,       0 },
+#ifndef NO_LIBAUDIT_SUPPORT
        { "trace",      cmd_trace,      0 },
+#endif
        { "inject",     cmd_inject,     0 },
 };
 
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