From: "Zhang, Sonic" <Sonic.Zhang@analog.com>
To: Chen Gang <xili_gchen_5257@hotmail.com>,
        "realmz6@gmail.com" <realmz6@gmail.com>,
        Richard Weinberger <richard.weinberger@gmail.com>
CC: "adi-buildroot-devel@lists.sourceforge.net" 
	<adi-buildroot-devel@lists.sourceforge.net>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [Adi-buildroot-devel] [Consult] blackfin: About one building
 break	issue for STACKTRACE
Thread-Topic: [Adi-buildroot-devel] [Consult] blackfin: About one building
 break	issue for STACKTRACE
Thread-Index: AQHQeFkZ7A43By86OUa5tbZnVGr8NZ1QhGYw
Date: Fri, 17 Apr 2015 03:02:21 +0000
Message-ID: <B168F8A49F4BCF4C84FD23DA5F6363EE6128FDD9@NWD2MBX5.ad.analog.com>
References: <BLU436-SMTP217AD4036397D1A90B60FB4B9E40@phx.gbl>
In-Reply-To: <BLU436-SMTP217AD4036397D1A90B60FB4B9E40@phx.gbl>
Accept-Language: zh-CN, en-US
Content-Language: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 8BIT
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Apr 2015 03:03:22.5494
 (UTC)
X-MS-Exchange-CrossTenant-Id: eaa689b4-8f87-40e0-9c6f-7228de4d754a
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=eaa689b4-8f87-40e0-9c6f-7228de4d754a;Ip=[137.71.25.57];Helo=[nwd2mta2.analog.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR0301MB0759
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 3131
Lines: 91

Hi Gang,

Please only use the GCC for Blackfin 2013R1 or 2014R1 from https://sourceforge.net/projects/adi-buildroot/files/ . Upstream GCC5 isn't ported to Blackfin properly.

Regards,

Sonic

>-----Original Message-----
>From: Chen Gang [mailto:xili_gchen_5257@hotmail.com]
>Sent: Thursday, April 16, 2015 11:22 PM
>To: realmz6@gmail.com; Richard Weinberger
>Cc: adi-buildroot-devel@lists.sourceforge.net; linux-kernel@vger.kernel.org
>Subject: [Adi-buildroot-devel] [Consult] blackfin: About one building break issue for STACKTRACE
>
>Hello Maintainers:
>
>I want to consult one building issue about blackfin, the related issue
>is:
>
>    CC      arch/blackfin/kernel/stacktrace.o
>  arch/blackfin/kernel/stacktrace.c: In function 'save_stack_trace':
>  arch/blackfin/kernel/stacktrace.c:23:6: error: frame pointer required, but reserved
>   void save_stack_trace(struct stack_trace *trace)
>        ^
>  arch/blackfin/kernel/stacktrace.c:13:24: note: for 'current_frame_pointer'
>   register unsigned long current_frame_pointer asm("FP");
>                          ^
>
>For me:
>
> - Originally, I treated it as gcc's issue, but after think of, for me,
>   gcc is OK:
>
>    "-fomit-frame-pointer" is needed by extern "FP" pointer.
>
>    "-fomit-frame-pointer" is against "-pg" (they can not be together).
>
> - For kernel:
>
>    STACKTRACE needs "-fomit-frame-pointer", and FUNCTION_TRACER will
>    enable "-pg",
>
>    FUNCTION_TRACER and STACKTRACE are related.
>
>    The related commit: "1c873be Blackfin: initial support for ftrace"
>    (the commit time point is Jun 9 2009).
>
> - After this related commit, it never can pass building by upstream
>   blackfin gcc5:
>
>    make defconfig && make menuconfig
>
>    enable FUNCTION_TRACER (which also enable STACKTRACE)
>
>    make (which will cause building break)
>
>So I want to consult:
>
> - Is it OK to use upstream gcc5 for blackfin? (or which gcc version is
>   suitable for building blackfin Linux kernel?)
>
> - Did the original commit pass building ? (e.g. by one of old gcc
>   version).
>
> - How to fix this issue, next?
>
>
>Welcome any members ideas, suggestions and completions.
>
>Thanks.
>--
>Chen Gang
>
>Open, share, and attitude like air, water, and life which God blessed
>
>------------------------------------------------------------------------------
>BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN
>2 standard Learn Process modeling best practices with Bonita BPM through live exercises
>http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_
>source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF
>_______________________________________________
>Adi-buildroot-devel mailing list
>Adi-buildroot-devel@lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/adi-buildroot-devel

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