Using 32-bit applications on Arch64

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64-Bit-Processors like Athlon 64 are able to execute 32- and 64-Bit-programms ar the same time. Unfortunately the x86_64-version of Arch (Arch64) does not provide any 32-Bit-libs by default.

Currently I am working on an easy solution to solve this. It does not use a cross-compiler nor a chroot-environment. I just make use of the arch32-packages which are allready there.

Note: All libs will be installed under /opt/lib32. Arch64 should not be affected by this. In the case of any problems use pacman -R lib32 to remove all libs.

Atenttion: Never try to install all libs with pacman -S lib32. And do not install any arch32-package.


All 32-bit-packages can be found in the [community]-repository. The packages are kept in sync to the ones from arch32. Use them at your own risk.


You will allways need to install lib32-glibc in order to execute 32-bit-programms. It might be necessary to fake the output of uname. Use the package linux32 for this.

Some c++-programms also need lib32-libstdc++5.


Programms using OpenGL need one of the following libs which fits to your graphicscard:

  • nVidia: lib32-nvidia-utils
  • ATI: lib32-ati-fglrx-utils
  • DRI: (all opensource-drivers like those for Intel-chips) lib32-libgl-dri


Programms using QT should run at once after installing lib32-qt.

Alsa & OpenAL

For Alsa and OpenAL-Support you have to install lib32-alsa-lib and lib32-openal.

Tested Applications

  • Doom3, Enemy-Territory, Unreal Tournament
    • lib32-nvidia-beta-utils, lib32-openal, lib32-alsa-lib, lib32-libstdc++5
  • Opera
    • lib32-qt
  • Google Earth
    • lib32-qt and a OpenGL-driver (see above)
  • Skype
    • lib32-qt, ib32-alsa-lib