[ECOS] Problems while cross compiling for ARM

[ECOS] Problems while cross compiling for ARM

[Igor Trevisan]

Hi.

I built an ARM-Thumb development tool for Linux following step
by step all the instructions I found in the page:
"Building the thumb-elf development tools for Linux",
and I'm still trying to cross-compile a simple "hello.c" file but I don't 
succeed.
I'm using the tool without eCos.
Now my arm-gcc find the include files; but I have to do with the 
following new error message:

> /tools/H-i686-pc-linux-gnu/lib/gcc-lib/arm-elf/2.97/../../../../arm-
   elf/bin/ld:
> cannot open crt0.o: File o directory inesistente
> collect2: ld returned 1 exit status

What can I do to avoid this problem?

Thanks in advance to everyone that will help me.

	Igor.

P.S.: Thank you Jonathan for your previous and timely answer!

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Re: [ECOS] Problems while cross compiling for ARM

[Rafael Rodríguez Velilla]

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  It seems that you haven't used arm-elf-gcc with the option -nostdlib. If
you don't specify this option, gcc tries to link your program against
crt0.o, an object that should contain the initialization code.
  In the "getting started guide" of eCos I found information on how to
compile for eCos. eCos uses its own initialization code so it doesn't need
crt0.o.


Igor Trevisan wrote:

> Hi.
>
> I built an ARM-Thumb development tool for Linux following step
> by step all the instructions I found in the page:
> "Building the thumb-elf development tools for Linux",
> and I'm still trying to cross-compile a simple "hello.c" file but I don't
> succeed.
> I'm using the tool without eCos.
> Now my arm-gcc find the include files; but I have to do with the
> following new error message:
>
> > /tools/H-i686-pc-linux-gnu/lib/gcc-lib/arm-elf/2.97/../../../../arm-
>    elf/bin/ld:
> > cannot open crt0.o: File o directory inesistente
> > collect2: ld returned 1 exit status
>
> What can I do to avoid this problem?

--
Rafael Rodríguez Velilla        rrv@tid.es
Telefónica I+D          http://www.tid.es
Telf: 34 - 1 - 91 337 4270

Re: [ECOS] Problems while cross compiling for ARM

[Bart Veer]

>>>>> "Igor" == Igor Trevisan <igor@bluewind.it> writes:

    Igor> I built an ARM-Thumb development tool for Linux following
    Igor> step by step all the instructions I found in the page:
    Igor> "Building the thumb-elf development tools for Linux", and
    Igor> I'm still trying to cross-compile a simple "hello.c" file
    Igor> but I don't succeed. I'm using the tool without eCos. Now my
    Igor> arm-gcc find the include files; but I have to do with the
    Igor> following new error message:

    Igor> /tools/H-i686-pc-linux-gnu/lib/gcc-lib/arm-elf/2.97/../../../../arm-elf/bin/ld:
    Igor> cannot open crt0.o: File o directory inesistente
    Igor> collect2: ld returned 1 exit status

    Igor> What can I do to avoid this problem?

    Igor> Thanks in advance to everyone that will help me.

If you are using newlib rather than eCos then there should be a crt0.o
file in a lib directory somewhere inside the install tree. You may
need to specify a suitable path using a -L argument to arm-elf-gcc,
although I would have expected the compiler to be able to find this
directory automagically. It is a long time since I did any work with
newlib rather than eCos so I am afraid I cannot remember all the
details. You may have more luck asking this question on the cross-gcc
mailing list, http://sources.redhat.com/ml/crossgcc , since the people
on the ecos-discuss mailing list are usually not particularly
interested in newlib anymore.

Bart Veer // eCos net maintainer