[U-Boot] [PATCH] Link the correct libgcc.a on ARMv4T architecture

[Paul Hsu]

On Wed, Sep 8, 2010 at 4:16 PM, Wolfgang Denk <wd at denx.de> wrote:
> Dear Paul Hsu,
>
> In message <1283932498-8989-1-git-send-email-pochun.hsu at gmail.com> you wrote:
>> If we use $(CC -print-libgcc-file-name) without option -march=armv4t,
>> we will link the wrong version libgcc.a(for ARMv5).
>> That causes cpu core raising excptions when u-boot running on the board.
>
> On which tool chain is this causing problems?

I use toolchain released by code sourcery(Sourcery G++ Lite 2010q1-202
for ARM GNU/Linux).

  $ /opt/arm-2010q1/bin/arm-none-linux-gnueabi-gcc
-print-libgcc-file-name -march=armv4t
  /opt/arm-2010q1/bin/../lib/gcc/arm-none-linux-gnueabi/4.4.1/armv4t/libgcc.a
  This libgcc.a is a correct one we need on ARMv4T.

If you use the same command wihtout -march=armv4t
  $ /opt/arm-2010q1/bin/arm-none-linux-gnueabi-gcc -print-libgcc-file-name
  /opt/arm-2010q1/bin/../lib/gcc/arm-none-linux-gnueabi/4.4.1/libgcc.a
  This is not the one we need.

>
> And how does this problem manifest?
>
>> Signed-off-by:Paul Hsu <pochun.hsu at gmail.com>
>> ---
>>  Makefile |   15 +++++++++++++++
>>  1 files changed, 15 insertions(+), 0 deletions(-)
>
> NAK. If really needed, this needs to be fixed in ARM specific config
> files / Makefiles, not in the top level Makefile.

I agree that we should find a better place to put ARM specific config in.
But currently, top level Makefile is the one I found.
Any suggestion?

BR,
Paul

>
> 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
> core error - bus dumped
>



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