linux-kernel - Re: [PATCH] perf build: Fix libbabeltrace detection

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Date:	Tue, 10 Mar 2015 13:04:26 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jeremie Galarneau <jgalar@...icios.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Tom Zanussi <tzanussi@...il.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH] perf build: Fix libbabeltrace detection

Em Tue, Mar 10, 2015 at 03:11:11PM +0100, Jiri Olsa escreveu:
> On Tue, Mar 10, 2015 at 11:01:34AM -0300, Arnaldo Carvalho de Melo wrote:
> > Ah, I found the following patch useful in debugging this, if you're ok with it,
> > I'll put it in my tree with your Acked-by, ok?
> > 
> > - Arnaldo
> > 
> > [acme@zoo linux]$ git diff tools/perf/config/Makefile
> > diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> > index e2350ada6ccd..4992c39652e6 100644
> > --- a/tools/perf/config/Makefile
> > +++ b/tools/perf/config/Makefile
> > @@ -184,7 +184,7 @@ endif
> >  
> >  feature_check = $(eval $(feature_check_code))
> >  define feature_check_code
> > -  feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin >/dev/null 2>/dev/null && echo 1 ||
> > +  feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin > $(OUTPUT_FEATURES)make-$(1) 2>&1 
> >  endef
> 
> ack, that seem usefull.. I always redirected this to '>> /tmp/krava'
> never got enough will to make it nice and generic ;-)

Got stuck trying to get the 'clean' target done, argh, makefiles, trying
to use the OUTPUT_FEATURES to add a clean target on
tools/perf/config/Makefile, but then if I call it from the main
makefile... it will do feature detection again...

So I think I'll have to redefine it on the main Makefile to avoid having
to call tools/perf/config/Makefile again, right?

Anyway, after lunch I'll try again.

- Arnaldo


diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index ec4c063ed9f3..8177a063ee0a 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -530,6 +530,7 @@ clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean config-clean
 	$(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32
 	$(call QUIET_CLEAN, core-gen)   $(RM)  *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope* $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)PERF-FEATURES $(OUTPUT)util/*-bison* $(OUTPUT)util/*-flex*
 	$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
+	$(QUIET_SUBDIR0)config $(QUIET_SUBDIR1) clean
 	$(python-clean)
 
 #
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index d44c64d64465..9a492b56984a 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -184,7 +184,7 @@ endif
 
 feature_check = $(eval $(feature_check_code))
 define feature_check_code
-  feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0)
+  feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin > $(OUTPUT_FEATURES)make-$(1).feature-test.output 2>&1 && echo 1 || echo 0)
 endef
 
 feature_set = $(eval $(feature_set_code))
@@ -880,3 +880,9 @@ $(call detected_var,LIBDIR)
 $(call detected_var,GTK_CFLAGS)
 $(call detected_var,PERL_EMBED_CCOPTS)
 $(call detected_var,PYTHON_EMBED_CCOPTS)
+
+CLEAN_FILES = $(OUTPUT_FEATURES)make-*.feature-test.output
+
+clean:
+	$(call QUIET_CLEAN, config) $(RM) $(CLEAN_FILES)
+
--
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