In the process of building the cross-compilation toolchain a local toolchain is also created. To avoid confusion with any existing native compilation tools the "triplet" for this toolchain has the word "cross" embedded into it.
export CLFS_HOST=$(echo ${MACHTYPE} | sed "s/-[^-]*/-cross/")
echo export CLFS_HOST=\""${CLFS_HOST}\"" >> ~/.bashrc
The Endianess of system refers to how numbers are represented. See the following wiki entry for additional details: http://en.wikipedia.org/wiki/Endianness Based on the selected platform the following setting is appropriate:
export CLFS_ENDIAN=little
echo export CLFS_ENDIAN=\""${CLFS_ENDIAN}\"" >> ~/.bashrc
During the building of the cross-compile tools you will need to set a few variables that will be dependent on your particular needs. You will need to set the target triplet for the target architecture, and the CPU type. Review the configuration file, especially the "Processor type and features" section. Set the variables using the method listed below:
Table 6.1. Processor Type and Target Triplets
| Kernel | Processor | Target Triplet | CPU Type | Note |
|---|---|---|---|---|
| CONFIG_M486 | 486 Compatibles | i486-pc-linux-musl | i486 | Intel's i486 |
| Pentium, K6, 586 Compatibles | i586-pc-linux-musl | i586 | Intel Pentium without MMX | |
| CONFIG_M686 | Pentium II, Pentium III, Pentium 4 | i686-pc-linux-musl | i686 | PentiumPro instruction set |
| Athlon | i686-pc-linux-musl | athlon | AMD 32 bit Athlon | |
| Opteron | x86_64-unknown-linux-musl | k8 | AMD K8 processors with x86-64 |
export CLFS_CPU=i686
echo export CLFS_CPU=\""${CLFS_CPU}\"" >> ~/.bashrc
export CLFS_TARGET=i686-unknown-linux-musl
echo export CLFS_TARGET=\""${CLFS_TARGET}\"" >> ~/.bashrc