Re: massive cross-builds without too much PITA

[Herbert Poetzl]

On Thu, Oct 28, 2004 at 06:21:22PM +0200, Alessandro Amici wrote:
> 
> Al,
> 
> I happen to be learning how to cross-compile on Debian right now, so i can 
> testify that building the cross toolchain 'The Debian Way' is even easier 
> than you describe ;).
> 
> On Thursday 28 October 2004 07:48, Al Viro wrote:
> > Building cross-toolchain is surprisingly easy these days; I'm using debian
> > on build boxen and cross-compilers are not hard to do:
> >  apt-get build-dep binutils
> >  apt-get build-dep gcc-3.3
> >  apt-get install dpkg-cross
> >  apt-get source binutils
> >  get binutils-cross-... patch from bugs.debian.org/231707
> >  cd binutils-...
> >  apply patch
> >  TARGET=<target>-linux fakeroot debian/rules binary-cross
> >  cd ..
> >  dpkg -i binutils-<target>-....deb
> >  got linux-kernel-headers, libc6, libc6-dev and libdb1-compat for target
> >  dpkg-cross -a <target> -b on all of those
> >  dpkg -i resulting packages
> >  apt-get source gcc-3.3
> >  cd gcc-3.3-...
> >  GCC_TARGET=<gcc_target> debian/rules control
> >  GCC_TARGET=<gcc_target> debian/rules build
> >  GCC_TARGET=<gcc_target> fakeroot debian/rules binary
> >  cd ..
> >  dpkg -i resulting packages.
> > One note: <target> here is debian platform name (e.g. ppc), but
> > <gcc_target> is *gcc* idea of what that bugger is called (e.g. powerpc).
> >
> > IIRC, Nikita Youshchenko had pre-built debs somewhere, but they were not
> > for the host I'm using (amd64/sid).
> 
> The package toolchain-source (together with dpkg-cross) makes the process even 
> more automatic. Detailed instructions are at:
> http://people.debian.org/~debacle/cross.html
> 
> The short story is:
> # apt-get toolchain-source dpkg-cross autoconf2.13 fakeroot
> # tpkg-install-libc <terget>-linux # grabs, converts and install the headers
> $ tpkg-make <target>-linux  # no need to patch anything
> $ cd binutils...
> $ debuild -us -uc    # no magic env variables
> # dpkg -i ../binutils...deb
> $ cd ../gcc...
> $ debuild -us -uc
> # dpkg -i ../gcc...deb
> 
> If I'm not mistaken, that's all.
> 
> > In practical terms it means no ppc64.
> 
> Sadly right! guess which platform I needed to cross compile :-/

http://vserver.13thfloor.at/Stuff/Cross/howto.info
(don't forget to apply the 'fixes' from
 http://vserver.13thfloor.at/Stuff/Cross/)

HTH,
Herbert

> Cheers,
> Alessandro
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