Difference between revisions of "Cross compilation"
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Put simply, a compiler takes source code as input and produces a binary executable as output. Cross compilation refers to the case where the binary code produced is designed to execute on a different machine architecture than the host system. | Put simply, a compiler takes source code as input and produces a binary executable as output. Cross compilation refers to the case where the binary code produced is designed to execute on a different machine architecture than the host system. | ||
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*The build process can be run as a non-root user on the host unix system, preventing damage to the host system if the toolchain misbehaves | *The build process can be run as a non-root user on the host unix system, preventing damage to the host system if the toolchain misbehaves | ||
| − | + | == Host enviroment == | |
| − | *[[ | + | *[[Enviroment variables affecting cross toolchains]] |
| − | + | *a version of ''gcc'' and ''binutils'' that supports cross compilation is required in the ''host'' enviroment | |
| − | + | *headers to link against are required | |
| − | + | *libraries are required to be present that are compatible with the ''target'' system. | |
| − | |||
| − | + | == See also == | |
*[http://buildroot.uclibc.org buildroot] | *[http://buildroot.uclibc.org buildroot] | ||
| + | *Wikipedia: [[w:Cross-compiling|Cross-compiling]] | ||
*http://www.airs.com/ian/configure/configure_5.html | *http://www.airs.com/ian/configure/configure_5.html | ||
*[http://kegel.com/crosstool/crosstool-0.42/buildlogs/ gcc toolchain cross compilation matrix] | *[http://kegel.com/crosstool/crosstool-0.42/buildlogs/ gcc toolchain cross compilation matrix] | ||
*[[Wikipedia:Eat one's own dog food|Eating one's own dog food]] | *[[Wikipedia:Eat one's own dog food|Eating one's own dog food]] | ||
| + | [[Category:Peerix]][[Category:Linux]] | ||
Latest revision as of 09:23, 17 January 2009
Put simply, a compiler takes source code as input and produces a binary executable as output. Cross compilation refers to the case where the binary code produced is designed to execute on a different machine architecture than the host system.
For example: Using a C compiler on a PPC system to produce code to run on an Intel.
A cross-compilation environment (refered to as the toolchain) provides a number of advantages, even when the host and target architectures are the same.
- Strict control of the version on cc, libc and binutils used
- The build process can be run as a non-root user on the host unix system, preventing damage to the host system if the toolchain misbehaves
Host enviroment
- Enviroment variables affecting cross toolchains
- a version of gcc and binutils that supports cross compilation is required in the host enviroment
- headers to link against are required
- libraries are required to be present that are compatible with the target system.
