linux-kernel - Re: [PATCH 0/5] Perf fixes for ARC + uClibc

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Message-ID: <1420829227.5917.5.camel@synopsys.com>
Date:	Fri, 9 Jan 2015 18:47:08 +0000
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	"acme@...hat.com" <acme@...hat.com>
CC:	"mingo@...nel.org" <mingo@...nel.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"bp@...e.de" <bp@...e.de>, "jolsa@...nel.org" <jolsa@...nel.org>,
	"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [PATCH 0/5] Perf fixes for ARC + uClibc

Hi Arnaldo,

On Wed, 2015-01-07 at 07:38 +0000, Vineet Gupta wrote:
> On Tuesday 06 January 2015 08:43 PM, Arnaldo Carvalho de Melo wrote:
> 
> > Em Tue, Jan 06, 2015 at 07:22:10PM +0530, Vineet Gupta escreveu:
> > > > Hi,
> > > > 
> > > > This series based off linux-next of 20150105 allows us to build/use perf
> > > > for ARC with uClibc based userland.
> > Do you have some ready made ARC VM image with devel tools I could use with qemu?
> > 
> > - Arnaldo
> >  
> 
> FWIW, most of the issues I posted fixes for can be reproduced with
> building perf with ARC buildroot !
> 
> git://github.com:foss-for-synopsys-dwc-arc-processors/buildroot.git

To reproduce described build problems (covered in patches 1, 2, 3, 5) you may indeed use Buildroot.
Just get the most recent release from here http://buildroot.uclibc.org/downloads/buildroot-2014.11.tar.gz
and use load following configuration in "menuconfig":
--->---
BR2_arcle=y
BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_DEFCONFIG="fpga"
BR2_PACKAGE_PERF=y
BR2_TARGET_ROOTFS_INITRAMFS=y 
--->---

Then say "make" and you'll see the problem.
If you experience any problems trying to follow my advice please let me
know and I'll try to help you.

-Alexey
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