MultiLib
On some architectures, a single toolchain supports several architectures. The most common example is x86_64-linux-gnu -m32 emitting code for i686-linux-gnu. Typically, this functionality is made available via the gcc-multilib package. For more information about multi-architecture systems, see CategoryMultiarch.
Removing gcc-multilib
As cross toolchain support improves, multilib support is supposed to be phased out. When one would use -m32 earlier, one should now use i686-linux-gnu-gcc as compiler.
Removal status
aflplusplus 
elfutils: supposedly used for testing, but really unused - fasm
- fis-gtm
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gcc-11: Use will be removed when it is no longer built. - gcc-12: Use will be removed when it is no longer built.
- gcc-13: Use will be removed when it is no longer built.
- gcc-14: Use will be removed when it is no longer built.
- gcc-15: Use will be removed when it is no longer built.
- gcc-snapshot: Use will be removed when it is no longer built.
- gnu-efi: difficult. We'd need gcc-i686-gnu, but it's not built, cause it's not a port.
- grub2: difficult. We'd need gcc-i686-gnu`, but that's not built, cause it's not a port.
- ispc
- libnss-extrausers
- linux
- llvm-toolchain-14
- llvm-toolchain-17
- llvm-toolchain-18
- llvm-toolchain-19
- llvm-toolchain-20
- llvm-toolchain-snapshot
- memtest86+
- multiboot
- ncurses: Builds a shared library that links libc.
- oaklisp
- readline: Builds a shared library that links libc.
- rr: difficult. Uses CMake to build both a 64bit library and a 32bit library. Manually fiddles -m32, but has no option to replace the 32bit compiler. Doing two passes fails, because the 32bit build pass would then need libcapnp-dev:i386 but we cannot have cross-arch dependencies.
- sbsigntool
- smlnj
- snapd
- strace
- syslinux: unused dependency
- user-mode-linux
- valgrind
- virtualbox
- wraplinux: can use i686-linux-gnu-gcc
- x86info: unused dependency
- xen
- xserver-xorg-video-geode: should stop building on amd64, use xserver-xorg-video-geode:i386 via multilib instead
- zlib: Builds a shared library that links libc.
Icons:
- TODO
- defer
- WIP
done