Push the calculation of the tuple's kernel part down to kernel's build scripts:
- update the kernel script's API with the function CT_DiKernelTupleValues
- update doc accordingly (also with the architecture change, missing in the previous commit)
- small clean-up in the main script, remove useless test

/trunk/scripts/build/kernel/bare-metal.sh | 5 5 0 0 +++++
/trunk/scripts/build/kernel/linux.sh | 5 5 0 0 +++++
/trunk/scripts/crosstool.sh | 31 13 18 0 +++++++++++++------------------
/trunk/scripts/functions | 15 8 7 0 ++++++++-------
/trunk/docs/overview.txt | 13 9 4 0 +++++++++----
5 files changed, 40 insertions(+), 29 deletions(-)

# Compute powerpc-specific values

CT_DoArchTupleValues () {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}"

    # The kernel ARCH:

    CT_KERNEL_ARCH=powerpc

    # Add spe in the tuplet if needed

    case "${CT_LIBC},${CT_ARCH_POWERPC_SPE}" in

        glibc,|eglibc,)   CT_TARGET_SYS=gnu;;

        glibc,y|eglibc,y) CT_TARGET_SYS=gnuspe;;

    esac

    # Add extra flags for SPE if needed

    if [ "${CT_ARCH_POWERPC_SPE}" = "y" ]; then

        CT_ARCH_TARGET_CFLAGS="-mabi=spe -mspe"

        CT_ARCH_CC_CORE_EXTRA_CONFIG="--enable-e500_double"

        CT_ARCH_CC_EXTRA_CONFIG="--enable-e500_double"

    fi

}