Hi! I've been using this locally for some time, and been meaning to publish it here, but was prompted to do it now, due to some recent bugs filed against dpkg to support multilib style cross-toolchains.
Mutlilib is IMO a hack that should just disappear in Debian at least at the packaging level, not necessarily on the gcc support level; it needs special casing and can confuse the build systems because it's not really transparent (for example «gcc -m32 -dumpmachin» does not print the correct triplet). Instead I present a fake cross-toolchain (currently based on basic gcc multilib support) but “deceiving” gcc to use the multiarch files instead. For example to use an amd64 → i486 fake cross-toolchain you do: $ dpkg --print-architecture amd64 $ apt-get install libgcc-4.8-dev:i386 libc6-dev:i386 $ ln -s ../../i486-linux-gnu/4.8 /usr/lib/gcc/x86_64-linux-gnu/4.8/32 $ ./gen-cross amd64 $ cp x86_64-linux-gnu-* /usr/local/bin And then you could, for example, use it like this when building packages: $ CC=i486-linux-gnu-gcc dpkg-buildpackage -ai386 (I'm still pondering if dpkg-buildpackage should set the cross-toolchain environment variables, probably it should.) Beware that if you have the libmudflap0-4.8-dev packages installed, they ship the alternative multilib files on the native package, so you'll need to get the 32 directory out of the way («mv 32 32-old» will do but dpkg might overwrite files there on upgrade). I've filed 719885 for that. Here's the git repo for people to play with, I'll happily take patches for other fake cross-toolchains. And I could even consider turning this into a package if people demanded it and the aforementioned bug got fixed. <git://git.hadrons.org/git/debian/fakecross.git> Enjoy, Guillem -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130816143319.ga23...@gaara.hadrons.org
