Re: cross-compilation documentation

[Andrew Pinski <pinskia at physics dot uc dot edu>]

On Sunday, Jun 22, 2003, at 13:09 US/Eastern, Peter Barada wrote:

> > No you do not have install the headers because you can pass to gcc
> > --without-headers and that will make sure that you do not compile
> > the sources that require glibc's headers.
> >
> > So total process is:
> > cd gccobjdir
> > .../gcc-sources/configure --without-headers --target=???-linux-gnu
> > --prefix=??? --enable-languages=c
>
> That doesn't work (at least for ppc-linux) since
> gcc-3.3/config/rs6000/linux.h #includes <signal.h> when building
> libgcc2, which causes it to fail since there are no headers(yet).
>
> The *real* solution is to suppress building libgcc as part of the
> cross compilation bootstrap so the circular dependency of
> compiler-headers-compiler is broken.
> I have succeeded in building a ppc-linux target by tweaking the
> obj/gcc-bootstrap/gcc/Makefile to suppress the definitions of LIBGCC
> and INSTALL_LIBGCC(the following fragment from my master build 
> Makefile):
>
> fix-bootstrap1-makefile:
> 	cd ${BOOTSTRAP1_BUILDDIR}/gcc ; \
> 	sed -e '1,$$s/^LIBGCC =/# LIBGCC =/;1,$$s/^INSTALL_LIBGCC =/# 
> INSTALL_LIBGCC =/' < Makefile > Makefile.new ; \
> 	mv Makefile.new Makefile
>
> I'm working(slowly) on adding a --without-libgcc to gcc/configure to
> do this...

That is a bug in the config of rs6000 of gcc which should be fixed,
I have a patch for it and there is no need for --without-libgcc:

try this patch:

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I will submit it if it works for you.


Thanks,
Andrew Pinski