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Re: loadable kernel module link failure - endianness incompatible with

To: myuboot@fastmail.fm
Subject: Re: loadable kernel module link failure - endianness incompatible with that of the selected emulation
From: David Daney <ddaney@caviumnetworks.com>
Date: Tue, 19 Jan 2010 15:47:34 -0800
Cc: linux-kernel@vger.kernel.org, linux-mips@linux-mips.org
In-reply-to: <1263930694.9779.1355491925@webmail.messagingengine.com>
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myuboot@fastmail.fm wrote:
I got a link error when compiling 2 loadable kernel modules -
"endianness incompatible with that of the selected emulation".
But both kernel and the kernel modules of error are in big endian. I
don't know what I should check or fix. Any suggestions? I checked the
endianess of the kernel by checking the elf header of vmlinux file, is
that the right way to do it?

Below are the error info and the readelf output, showing both the kernel
and a kernel module are in big endian.
Thanks for your help. Andrew

1) error log make -C /home/root123/sources/kernel/linux
CROSS_COMPILE=""/home/root123/sources/gcc3.4.3-be"/bin/mips-linux-"
M=/home/root123/sources/sdk/platform/src/linux/mxp/src modules
  LD [M]  /home/root123/sources/sdk/platform/src/linux/mxp/src/mxpmod.o
/home/root123/sources/gcc3.4.3-be/bin/mips-linux-ld:
/home/root123/sources/sdk/platform/src/linux/mxp/src/mmxpcore.o:
compiled for a big endian system and target is little endian
/home/root123/sources/gcc3.4.3-be/bin/mips-linux-ld:
/home/root123/sources/sdk/platform/src/linux/mxp/src/mmxpcore.o:
endianness incompatible with that of the selected emulation
/home/root123/sources/gcc3.4.3-be/bin/mips-linux-ld: failed to merge
target specific data of file
/home/root123/sources/sdk/platform/src/linux/mxp/src/mmxpcore.o
make[13]: ***
[/home/root123/sources/sdk/platform/src/linux/mxp/src/mxpmod.o] Error 1


Looks like a toolchain bug/configuration-problem. Hard to tell though as you didn't pass 'V=1' on the make invocation line.

David Daney

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