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From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] examples/standalone: Remove relocation compile flags for PowerPC
Date: Fri, 10 Sep 2010 23:10:15 +0200	[thread overview]
Message-ID: <20100910211015.A35DB153798@gemini.denx.de> (raw)
In-Reply-To: <1284149249.26713.2926.camel@petert>

Dear Peter Tyser,

In message <1284149249.26713.2926.camel@petert> you wrote:
>
> > Sorry, I'm confused.  What exactly do you want me to do?  Since you
> > applied Peter's patch, the problem has gone away for me.
> 
> However, I think there's still the issue that if there are multiple
> functions in a standalone application there's no guarantee the entry
> point function will be at the base of the image.  eg if the app were:

That's my understanding as well.

> My last question on the issue was:
> It looks like the -fno-toplevel-reorder flag is only available in gcc >=
> 4.2 (http://gcc.gnu.org/gcc-4.2/changes.html released May 2007).  So, do
> we add support to U-Boot to conditionally check for the gcc version like
> Linux to know when to use -fno-toplevel-reorder?  Or do we use a linker
> script that would support more versions of gcc at the cost of more
> complexity?
> 
> I never heard back about the preferred method.  I'd personally lean
> towards checking for compiler version and using the gcc version check +
> -fno-toplevel-reorder.

Given the fact that GCC 4.2 is already pretty old I also tend to add a
gcc version check with -fno-toplevel-reorder instead of increasing the
complexity of the linker scripts.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
You can observe a lot just by watching.                  - Yogi Berra

  reply	other threads:[~2010-09-10 21:10 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-15  3:25 [U-Boot] [PATCH] examples/standalone: Remove relocation compile flags for PowerPC Peter Tyser
2010-06-15 19:02 ` Timur Tabi
2010-06-15 19:05   ` Timur Tabi
2010-06-15 19:08     ` Peter Tyser
2010-06-15 19:20       ` Timur Tabi
2010-06-15 19:34         ` Peter Tyser
2010-06-15 19:36     ` Peter Tyser
2010-06-15 19:45       ` Timur Tabi
2010-06-15 20:15         ` Peter Tyser
2010-06-15 20:28           ` Wolfgang Denk
2010-06-15 20:39             ` Peter Tyser
2010-06-15 20:51               ` Wolfgang Denk
2010-06-16  3:37                 ` Peter Tyser
2010-06-16 14:02                   ` Timur Tabi
2010-06-16 14:51                     ` Wolfgang Denk
2010-09-10 19:49                       ` Wolfgang Denk
2010-09-10 19:53                         ` Timur Tabi
2010-09-10 20:07                           ` Peter Tyser
2010-09-10 21:10                             ` Wolfgang Denk [this message]
2010-09-12 22:38                             ` [U-Boot] [PATCH] examples/standalone: Use gcc's -fno-toplevel-reorder Peter Tyser
2010-09-13  2:00                               ` Andrew Dyer
2010-09-13  4:48                                 ` Peter Tyser
2010-09-16 11:49                                   ` Detlev Zundel
2010-10-12 20:47                               ` Wolfgang Denk
2010-06-15 20:39             ` [U-Boot] [PATCH] examples/standalone: Remove relocation compile flags for PowerPC Timur Tabi
2010-06-15 20:54               ` Wolfgang Denk
2010-06-15 21:03                 ` Timur Tabi
2010-06-15 22:56                   ` Wolfgang Denk
2010-06-15 19:48 ` Wolfgang Denk
2010-06-29 20:29   ` Wolfgang Denk

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