Re: amd64/gcc-3.4 archive: multilib/-m32 support available (compilation of 32bit i386-binaries)

[Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de>]

Andreas Jochens <aj@andaco.de> writes:

> The amd64/gcc-3.4 archive (http://debian-amd64.alioth.debian.org/gcc-3.4)
> finally supports the compilation and linking of 32bit i386 binaries
> using the gcc '-m32' switch. The gcc-3.4 package in the amd64/gcc-3.4 
> archive has been recompiled with the '--enable-multilib' option 
> which causes all the necessary libraries and files for 32bit i386 
> development with gcc to be created. 

Now you have messed up the pure64 archive with packages only planned
for multiarch.

Gratulations, one step further from a 3.4 based sarge.

> The amd64/gcc-3.4 archive also has additional 32bit 'libc6-i386' and 
> 'libc6-dev-i386' packages which are created by the 'glibc' source package 
> using the multilib-enabled gcc-3.4 compiler. These 32bit libc6 packages
> are needed to build the multilib enabled gcc-3.4 compiler itself.
>
> All 32bit libraries and files are placed in the '/lib/i486-linux' and 
> '/usr/lib/i486-linux' directories by those packages.
>
> Basically, 32bit development on amd64/gcc-3.4 is now as easy as this:
>
> # apt-get install gcc
> [...]
> # apt-get install gcc-3.4-i386
> Reading Package Lists... Done
> Building Dependency Tree... Done
> The following extra packages will be installed:
>   libc6-dev-i386 libc6-i386
> [...]
> # gcc -m32 hello.c
> # ./a.out
> Hello world
>
>
> This also means that packages like 'grub', which are 32bit-based,
> can now be compiled directly in an amd64 environment. All it needs is
> an additional Build-Depends on 'gcc-3.4-i386' (and the amd64-specific
> grub-patch, of course).

There is no amd64-specific grub patch and there won't be, none is needed.

> The relevant patches to the 'gcc-3.4' and 'glibc' packages can be found at
> http://debian-amd64.alioth.debian.org/gcc-3.4/patches/gcc-3.4_3.4.1ds1-5.0.0.2.amd64.patch
> and
> http://debian-amd64.alioth.debian.org/gcc-3.4/patches/glibc_2.3.2.ds1-15.0.0.1.amd64.patch
>
> Regards
> Andreas Jochens

MfG
        Goswin