linux-kernel - Re: [PATCHv2 00/36] perf tools: New build framework

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150116141552.GB23967@krava.brq.redhat.com>
Date:	Fri, 16 Jan 2015 15:15:52 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Mark Rutland <mark.rutland@....com>
Cc:	Will Deacon <Will.Deacon@....com>, Jiri Olsa <jolsa@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexis Berlemont <alexis.berlemont@...il.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Anton Blanchard <anton@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Borislav Petkov <bp@...en8.de>, Borislav Petkov <bp@...e.de>,
	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Florian Fainelli <florian@...nwrt.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	"msalter@...hat.com" <msalter@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"S. Lockwood-Childs" <sjl@...labs.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	Stephane Eranian <eranian@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Subject: Re: [PATCHv2 00/36] perf tools: New build framework

On Fri, Jan 16, 2015 at 01:49:10PM +0000, Mark Rutland wrote:
> Hi,
> 
> [...]
> 
> > > > > I just tried a cross-build for arm, and that blew up when trying to do
> > > > > something with arch/arm/util/libperf-in.o (log below). I bisected that
> > > > > to f169fbc4c59dd9d4 "perf build: Add arch x86 objects building". I'm
> > > > > looking into why now.
> > > > 
> > > > I get a similar failure doing a native arm64 build. I think the problem is
> > > > because the arch/ files for arm and arm64 aren't always required (i.e. there
> > > > are configurations where nothing is built under there) and, consequently,
> > > > libperf-in.o isn't actually needed and we try to link against something that
> > > > doesn't exist.
> > > 
> > > exactly ;-) I'll spin v3 shortly..
> > 
> > this fixes the issue for me
> > 
> > jirka
> > 
> > 
> > ---
> > diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
> > index d35b66014992..396b33b124d1 100644
> > --- a/tools/build/Makefile.build
> > +++ b/tools/build/Makefile.build
> > @@ -52,7 +52,7 @@ quiet_cmd_cc_s_c = AS       $@
> >  
> >  # Link agregate command
> >  quiet_cmd_ld_multi = LD       $@
> > -      cmd_ld_multi = $(LD) -r -o $@ $^
> > +      cmd_ld_multi = $(LD) -r -o $@ $(wildcard $^)
> >  
> >  # Build rules
> >  $(OUTPUT)%.o: %.c FORCE
> > 
> 
> Unfortunately that doesn't seem to be sufficient for me when
> cross-compiling. It looks like it supresses the warning from Make, but
> then LD explodes anyway because it wasn't provided any input files (log
> below).

argh.. right, when there are no source objects at all :-\ fix is comming ;-)

thanks,
jirka
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/