linux-kernel - Re: [PATCH 05/36] perf build: Disable make's built-in rules and variables

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Date:	Thu, 15 Jan 2015 17:24:35 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Alexis Berlemont <alexis.berlemont@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 05/36] perf build: Disable make's built-in rules and
 variables

On Thu, Jan 15, 2015 at 09:01:05AM -0700, David Ahern wrote:
> On 1/15/15 5:55 AM, Jiri Olsa wrote:
> 
> >diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> >index 1f71a32aea78..dd49b40e203b 100644
> >--- a/tools/perf/Makefile.perf
> >+++ b/tools/perf/Makefile.perf
> >@@ -84,6 +84,10 @@ ifneq ($(OUTPUT),)
> >  #$(info Determined 'OUTPUT' to be $(OUTPUT))
> >  endif
> >
> >+# Do not use make's built-in rules and variables
> >+# (this increases performance and avoids hard-to-debug behaviour);
> >+MAKEFLAGS += -rR
> >+
> >  $(OUTPUT)PERF-VERSION-FILE: ../../.git/HEAD
> >  	@$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
> >  	@touch $(OUTPUT)PERF-VERSION-FILE
> 
> Does this depend on any prior patch? Was not obvious to me. Adding just this
> patch to a fresh build and it blows up.
> 
> $ vi Makefile.perf
> - add line above
> $ mkdir /tmp/junk2
> $ make O=/tmp/junk2
> ...
>  CC       /tmp/junk2/fs/debugfs.o
>   CC       /tmp/junk2/fs/fs.o
>   CC       /tmp/junk2/fd/array.o
> /bin/sh: .event-parse.d: command not found
> /bin/sh: .trace-seq.d: command not found
> /bin/sh: .event-plugin.d: command not found
> make[3]: *** [.event-parse.d] Error 127
> make[3]: *** Waiting for unfinished jobs....
> ...
> 
> This is on a Fedora 16 host.

oops, I've cut it out of the framework changes to make
it simpler, but looks like traceevent library depends
on builtin rules, I'll check..

thanks,
jirka
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