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What is Multiarch?
Multiarch is the term being used to refer to the capability of a system to install and run applications of multiple different binary targets on the same system. For example running a i386-linux-gnu application on an amd64-linux-gnu system.
What is multilib in Linux?
Multilib is one of the solutions allowing users to run applications built for various application binary interfaces (ABIs) of the same architecture. The most common use of multilib is to run 32-bit applications on amd64. The multilib systems use separate library directories for non-native ABIs.
What is multilib GCC?
gcc-multilib is useful for cross-compiling, that is, compiling a program to run on a different processor architecture. For example, you would need gcc-multilib if you are running on 64-bit Ubuntu and want to compile a program to run on 32-bit Ubuntu (or on ARM etc. you get the idea).
Is AMD x86 64?
AMD64 is a 64-bit processor architecture that was developed by Advanced Micro Devices (AMD) to add 64-bit computing capabilities to the x86 architecture.
What is the difference between i386 and AMD64?
The difference between amd64 and i386 is that amd64 is 64-bit while i386 is 32-bit. This is the width (in bits) of registers available in the core.
How do you use Multilib?
These are the three main steps to enable multilib on Arch Linux:
- Enable multilib in the pacman config by uncommenting these two lines in pacman.conf: nano /etc/pacman.conf.
- Upgrade your system: sudo pacman -Syyu.
- Show 32-bit packages in the multilib repository: pacman -Sl | grep -i lib32.
What can multiarch do for multiple architectures?
Multiarch lets you install library packages from multiple architectures on the same machine. This is useful in various ways, but the most common is installing both 64 and 32-bit software on the same machine and having dependencies correctly resolved automatically.
Where does a shared library go in multiarch?
The latter is the case at least for executable files, shared libraries, static libraries and object files, and to some extent maybe header files. This means that in a multiarch world, such files must move to different locations in the file system than they are now.
Why does GNU toolchain support the multilib mechanism?
In addition to the base directory paths refered to above, the GNU toolchain supports the so-called “multilib” mechanism. This is intended to provide support for multiple incompatible ABIs on a single platform. This is implemented by the GCC back-end having hard-coded information about which compiler option causes an incompatible ABI change]
What do you need to know about multiarch in Debian?
User-oriented info on how to use multiarch: configuration, installation, cross-building. A maintainer-oriented document detailing how you can convert your library package over for multiarch paths. Bootstrapping The process/ordering/timeline for getting Debian unstable multiarched.