[PATCH] perf: Fix potential compilation error with some compilers

[PATCH] perf: Fix potential compilation error with some compilers

[Waiman Long]

The building of the perf tool failed in a SLES11 sp3 system with the
following compilation error:

cc1: warnings being treated as errors
util/scripting-engines/trace-event-perl.c: In function
‘perl_process_tracepoint’:
util/scripting-engines/trace-event-perl.c:285: error: format ‘%lu’
expects type ‘long unsigned int’, but argument 2 has type ‘__u64’

This patch replaces PRIu64 which is "lu" by the explicit "llu" to
fix this problem as __u64 is of type "long long unsigned".

Signed-off-by: Waiman Long <Waiman.Long@hp.com>
---
 .../perf/util/scripting-engines/trace-event-perl.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index a85e4ae..d6eb9c5 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -281,8 +281,12 @@ static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
 		return;
 
 	event = find_cache_event(evsel);
+	/*
+	 * attr.config is a __u64 which requires "%llu" to avoid compilation
+	 * error/warning with some compilers.
+	 */
 	if (!event)
-		die("ug! no event found for type %" PRIu64, evsel->attr.config);
+		die("ug! no event found for type %llu", evsel->attr.config);
 
 	pid = raw_field_value(event, "common_pid", data);
 
-- 
1.7.1

[tip:perf/urgent] perf scripting perl: Fix build error on Fedora 12

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  3b16ff89676d9902dc39976aee3cb0314ee37d93
Gitweb:     http://git.kernel.org/tip/3b16ff89676d9902dc39976aee3cb0314ee37d93
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Mon, 14 Oct 2013 18:25:12 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 17 Oct 2013 16:24:26 -0300

perf scripting perl: Fix build error on Fedora 12

Cast __u64 to u64 to silence this warning on older distros, such as
Fedora 12:

    CC       /tmp/build/perf/util/scripting-engines/trace-event-perl.o
  cc1: warnings being treated as errors
  util/scripting-engines/trace-event-perl.c: In function ‘perl_process_tracepoint’:
  util/scripting-engines/trace-event-perl.c:285: error: format ‘%lu’ expects type ‘long unsigned int’, but argument 2 has type ‘__u64’
  make[1]: *** [/tmp/build/perf/util/scripting-engines/trace-event-perl.o] Error 1
  make: *** [install] Error 2
  make: Leaving directory `/home/acme/git/linux/tools/perf'
  [acme@fedora12 linux]$

Reported-by: Waiman Long <Waiman.Long@hp.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Link: http://lkml.kernel.org/n/tip-nlxofdqcdjfm0w9o6bgq4kqv@git.kernel.org
Link: http://lkml.kernel.org/r/1381265120-58532-1-git-send-email-Waiman.Long@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/scripting-engines/trace-event-perl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index a85e4ae..c0c9795 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -282,7 +282,7 @@ static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
 
 	event = find_cache_event(evsel);
 	if (!event)
-		die("ug! no event found for type %" PRIu64, evsel->attr.config);
+		die("ug! no event found for type %" PRIu64, (u64)evsel->attr.config);
 
 	pid = raw_field_value(event, "common_pid", data);