4.3. Build Variables

Setting Host and Target

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. If you do not know what triplet or CPU type you want, you can use the table as a reference. Set the command using the method listed below:

export CLFS_HOST=$(echo ${MACHTYPE} | sed "s/-[^-]*/-cross/")
export CLFS_TARGET=[target triplet]
export CLFS_CPU=[cpu type]

Table 4.1. Processor Type and Target Triplets

Processor	Target Triplet	CPU Type	Note
486 Compatibles	i486-linux-musl	i486	Intel’s i486
Pentium, K6, 586 Compatibles	i586-linux-musl	i586	Intel Pentium without MMX
Pentium II, Pentium III, Pentium 4	i686-linux-musl	i686	PentiumPro instruction set
Athlon	i686-linux-musl	athlon	AMD 32 bit Athlon
Opteron	x86_64-linux-musl	k8	AMD K8 processors with x86-64

Now set the architecture of the CPU:

export CLFS_ARCH="x86"

Now we will add this to ~/.bashrc, just in case you have to exit and restart building later:

echo export CLFS_HOST=\""${CLFS_HOST}\"" >> ~/.bashrc
echo export CLFS_TARGET=\""${CLFS_TARGET}\"" >> ~/.bashrc
echo export CLFS_ARCH=\""${CLFS_ARCH}\"" >> ~/.bashrc
echo export CLFS_CPU=\""${CLFS_CPU}\"" >> ~/.bashrc