Compiled for big endian target is little endian ld error

Compiled for big endian target is little endian ld error

[DSP]

Hello,
I am having the same problem that Josh Fryman from this group had earlier.

http://sourceware.org/ml/binutils/2003-03/msg00092.html

I have a target that has Intel IXP425 on it. I am trying to port some code
developed using the commercial Timesys tools to be compiled using arm-linux
tools and was getting the same error that Josh mentioned in the above
thread.

[root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
arm_obj/dm256_reg_defs.o  -o dm256_ctrl
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
arm_obj/main.o: 
compiled for a big endian system and target is little endian
File in wrong format: failed to merge target specific data of file
arm_obj/main.o

When I used the -mbig-endian, I get a different error saying:

[root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
arm_obj/dm256_reg_defs.o  -mbig-endian -o dm256_ctrl
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses FPA instructions,
whereas dm256_ctrl does  not
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses hardware FP, whereas
dm256_ctrl uses soft ware FP
File in wrong format: failed to merge target specific data of
file /usr/local/ar m-linux/lib/be/libc.so.6

Can anyone lead me where the error is?
 
I installed arm-linux tools from arm-linux-tools-20031127.tar.gz


Thanks for your help.

Re: Compiled for big endian target is little endian ld error

[Nick Clifton]

Hi DSP,

> When I used the -mbig-endian, I get a different error saying:
> 
> [root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
> arm_obj/dm256_reg_defs.o  -mbig-endian -o dm256_ctrl
> /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
> ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses FPA instructions,
> whereas dm256_ctrl does  not

> /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
> ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses hardware FP, whereas
> dm256_ctrl uses software FP

Try compiling with both -mbig-endian and -mhard-float.

Cheers
   Nick

Re: Compiled for big endian target is little endian ld error

[DSP]

Thank you Nick for getting back to me.

I tried that option and it complains about some FPA and FP.

Here is the output:
[root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
arm_obj/dm256_reg_defs.o -mbig-endian -mhard-float -o  dm256_ctrll
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/arm-linux/lib/be/libc. so.6 uses FPA instructions,
whereas dm256_ctrl does not
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/arm-linux/lib/be/libc. so.6 uses hardware FP,
whereas dm256_ctrl uses software FP
File in wrong format: failed to merge target specific data of file
/usr/local/arm-linux/lib/be/libc.so.6
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtend.o uses FPA
instructions, whereas dm256_ctrl does not
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtend.o uses
hardware FP, whereas dm256_ctrl uses software FP
File in wrong format: failed to merge target specific data of file
/usr/local/lib/gcc-lib/arm-linux/3.3.2/be/ crtend.o
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtn.o uses FPA
instructions, whereas dm256_ctrl does not
/usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtn.o uses hardware
FP, whereas dm256_ctrl uses software FP
File in wrong format: failed to merge target specific data of file
/usr/local/lib/gcc-lib/arm-linux/3.3.2/be/ crtn.o
collect2: ld returned 1 exit status

Thank you.


On 3/13/06, Nick Clifton <nickc@redhat.com> wrote:
> Hi DSP,
>
> > When I used the -mbig-endian, I get a different error saying:
> >
> > [root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
> > arm_obj/dm256_reg_defs.o  -mbig-endian -o dm256_ctrl
> > /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
> > ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses FPA instructions,
> > whereas dm256_ctrl does  not
>
> > /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
> > ERROR: /usr /local/arm-linux/lib/be/libc.so.6 uses hardware FP, whereas
> > dm256_ctrl uses software FP
>
> Try compiling with both -mbig-endian and -mhard-float.
>
> Cheers
>    Nick
>
>
>

Re: Compiled for big endian target is little endian ld error

[Nick Clifton]

Hi DSP,

> [root@localhost phy_ctrl]# arm-linux-gcc arm_obj/main.o
> arm_obj/dm256_reg_defs.o -mbig-endian -mhard-float -o  dm256_ctrll
> /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
> ERROR: /usr/local/arm-linux/lib/be/libc. so.6 uses FPA instructions,
> whereas dm256_ctrl does not

Ah - this is probably because the very first object file on the linker's 
command line has not been compiled with -mhard-float.  This file is 
usually the crt0.o file - you can add the "-v" to the gcc command line 
to find out.

The implication is that the toolchain you are using has not been built 
with a set of hard-float multilibs, or that there is a bug in the linker 
and it is choosing the wrong set of flags to set in the private header 
of the dm256_ctrl output file.  The latter seems more likely since you 
have other error messages which imply that there are hard-float binaries 
in the toolchain:

   /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
   ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtn.o uses hardware
   FP, whereas dm256_ctrl uses software FP

So - what to do ?  First find out which file is the first object file on 
the linker's command line and then check to see what private flags have 
been set on this file (use "objdump -p").  If this file does have the 
hard-float and FPA flags set then the problem must be the linker.  Try 
downloading the latest binutils sources (either the 2.16 release or from 
the CVS mainline) ans building yourself a new linker.  If the first file 
has not been compiled with FPA support, then you could try finding the 
sources for it and recompiling it.

Cheers
   Nick

Re: Compiled for big endian target is little endian ld error

[Paul Brook]

> The implication is that the toolchain you are using has not been built
> with a set of hard-float multilibs, or that there is a bug in the linker
> and it is choosing the wrong set of flags to set in the private header
> of the dm256_ctrl output file.  The latter seems more likely since you
> have other error messages which imply that there are hard-float binaries
> in the toolchain:
>
>    /usr/local/lib/gcc-lib/arm-linux/3.3.2/../../../../arm-linux/bin/ld:
>    ERROR: /usr/local/lib/gcc-lib/arm-linux/ 3.3.2/be/crtn.o uses hardware
>    FP, whereas dm256_ctrl uses software FP

We saw this quite a bit before we switched to EABI based toolchains. It's 
relatively easy to build a toolchain where gcc and gas have different 
defaults. In particular the gas default FPU depends on the selected cpu. This 
means that under normal circumstances things work, but objects are marked 
incorrectly. If the user then explicitly specifies the default options (eg. 
-mhard-float) this overrides the gas defaults, and makes it "incompatible" 
with the existing objects.

The EABI toolchains don't suffer from this because the object attributes are 
explicitly encoded in the assembly file.

Paul