Stephen Kitt: > Hi, > > On Thu, 08 Apr 2021 01:35:49 +0100, Ximin Luo <[email protected]> wrote: >> Please mark gcc-mingw-w64-base "Multi-Arch: same" so that different >> architectures can be co-installed. This is necessary to support >> co-installing the i686 and x86-64 toolchain packages, both of which depend >> on this package but for their respective architectures. >> >> As far as I can tell this package has the same content on all >> architectures, so this should be safe: >> https://wiki.debian.org/MultiArch/Hints#set_Multi-Arch:_same > > It should be, yes, but I’m curious about why you’d want to install the > packages for both architectures simultaneously. Could you explain the > scenario? >
Hi, yes my scenario is to co-install both libstd-rust-dev-windows:i386 and libstd-rust-dev-windows:amd64 so that my rustc can cross-compile to both 32-bit and 64-bit windows at the same time. To do that, I need to co-install both gcc-mingw-w64-i686-posix:i386 and gcc-mingw-w64-x86-64-posix, but this is not yet possible due to this bug. Alternatively (and thinking about it, you should probably both), you can mark the compiler packages gcc-mingw-w64-*-* as "Multi-Arch: foreign" - this would e.g. allow gcc-mingw-w64-i686-posix:amd64 to satisfy the dependency from libstd-rust-dev-windows:i386 -> gcc-mingw-w64-i686-posix [no explicit architecture annotation] - without Multi-Arch: foreign, this dependency can only be satisfied by "gcc-mingw-w64-i686-posix:i386". It seems that gcc-mingw-w64-i686-posix:amd64 gcc-mingw-w64-x86-64-posix:amd64 are already co-installable, so this would work for me too. Multi-Arch: foreign is what the gcc cross-compilers do, e.g. gcc-powerpc-linux-gnu. So in summary, amending my original instructions: - Multi-Arch: foreign - gcc-mingw-w64-*-* - Multi-Arch: same - gcc-mingw-w64-base - in fact the Debian QA Multi-Arch hinter[1] goes a step further, it suggests you convert this package to Architecture: all and mark it Multi-Arch: foreign; I'm not sure why this package is arch-dependent in the first place. [1] https://qa.debian.org/[email protected]&piuparts=1#gcc-mingw-w64 (Note, libstd-rust-dev-windows:i386 doesn't exist in the Debian FTP archive yet, but I'm testing it locally - I'm only now just getting around to updating the rustc package to support cross-compiling to 32-bit windows after you fixed #540782, so thanks for that.) Best, Ximin -- GPG: ed25519/56034877E1F87C35 https://github.com/infinity0/pubkeys.git
