During the building of the cross-compile tools you will need to set a
few variables that will be dependent on your particular needs. The
first variable will be the triplet of the host machine, which will be
put into the CLFS_HOST
variable. To
account for the possibility that the host and target are the same
arch, as cross-compiling won't work when host and target are the
same, part of the triplet needs to be changed slightly - in our case,
we will change part of the triplet to "cross". Set CLFS_HOST
using the following command:
export CLFS_HOST=$(echo ${MACHTYPE} | sed -e 's/-[^-]*/-cross/')
Now you will need to set the triplet for the target architecture. Set the target variable using the following command:
export CLFS_TARGET="sparc64-unknown-linux-gnu"
We will need to setup target specific flags for the compiler and linkers. You can choose the appropriate BUILD64 and GCCTARGET from the table at the bottom of the page.
export BUILD64="[BUILD64 entries]
" export GCCTARGET="[GCCTARGET entries]
"
Now add the host and target variables, and compiler and linker flags,
to ~/.bashrc
, just in case you have to
exit and restart building later:
cat >> ~/.bashrc << EOF export CLFS_HOST="${CLFS_HOST}" export CLFS_TARGET="${CLFS_TARGET}" export BUILD64="${BUILD64}" export GCCTARGET="${GCCTARGET}" EOF
The following table gives the entries for different Sparc 64 capable processors. Pick the processor that matches your system. Note: GCC settings are only needed in the early sections of the book, and will not be used in the final-system builds.
Table 4.1. List of architectures, target triplets, and recommended book
Processor | BUILD64 | GCCTARGET |
---|---|---|
Ultrasparc and Ultrasparc2 | -m64 -mcpu=ultrasparc -mtune=ultrasparc | -mcpu=ultrasparc -mtune=ultrasparc |
Ultrasparc3 | -m64 -mcpu=ultrasparc3 -mtune=ultrasparc3 | -mcpu=ultrasparc3 -mtune=ultrasparc3 |