Cross-compiling for powerpc

Cross-compiling for powerpc

[Sébastien Côté]

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Hi!

I'm trying to build a cross-compiler for powerpc but I'm not really sure
which target I should select.

According to binutils/ld/configure.tgt, powerpc-elf and powerpc-eabi are
the same (what does eiba mean??).  But what's the difference with
powerpc-linux-gnu???

My target is a powerpc running linux, but it's an embedded system so
should I select eiba or linux?

If I have to select powerpc-linux, I get another problem since my target
is running in little-endian and there's no powerpcle-linux-gnu.

Could anyone point me in the right direction?

Thanks,

Sébastien Côté

Re: Cross-compiling for powerpc

[Sébastien Côté]

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Hi again,

I built my cross-compiler for powerpcle-elf... I installed binutils, gcc
and newlib following the instructions on the CrossGCC FAQ.  Everything
seemed to install correctly.  I can compile a simple program like this:

int main()
{
  while(1);
}


However, if I try to include any function from the library (newlib) with
the following line:
/cross/bin/powerpcle-elf-gcc test.c -o test

I get the following errors:
/tmp/ccNzgwZB.o: In function `main':
/tmp/ccNzgwZB.o(.text+0x38): undefined reference to `memcpy'
/tmp/ccNzgwZB.o(.text+0x44): undefined reference to `strlen'
/tmp/ccNzgwZB.o(.text+0x54): undefined reference to `malloc'
collect2: ld returned 1 exit status

So I tought I should add "-lc" to the end of the gcc command since it
didn't seem to libc.  I got the following:
/cross/powerpcle-elf/lib/libc.a(sbrkr.o): In function `_sbrk_r':
/home/scote1/build-newlib/powerpcle-elf/newlib/libc/reent/../../../../../newlib-1.9.0/newlib/libc/reent/sbrkr.c:61:
undefined reference to `sbrk'
collect2: ld returned 1 exit status


Does anybody know what the problem might be??  Why is it using libs in
the sources directory in the first place???  I have really no idea what
might be wrong!

Thanks!

Sébastien Côté

Re: Cross-compiling for powerpc

[Alexandre Oliva]

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On Jan 30, 2001, Sébastien Côté <scote1@Matrox.COM> wrote:

> /cross/powerpcle-elf/lib/libc.a(sbrkr.o): In function `_sbrk_r':
> /home/scote1/build-newlib/powerpcle-elf/newlib/libc/reent/../../../../../newlib-1.9.0/newlib/libc/reent/sbrkr.c:61:
> undefined reference to `sbrk'

Looks like some problem in newlib.  Maybe you should ask in the
mailing list devoted to newlib?

> Does anybody know what the problem might be??  Why is it using libs in
> the sources directory in the first place???

It is not.  It's just that the debugging information in the binary
library contains the complete pathnames of the sources.  So that, in
case you decide to debug it, it will ``just work'' unless you remove
the source tree.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me