Enhance ./configure tools checking.
Add check for compatible autoconf.

/trunk/configure | 95 61 34 0 ++++++++++++++++++++++++++++++++++++++++----------------------
1 file changed, 61 insertions(+), 34 deletions(-)

# Compute Alpha-specific values

CT_DoArchValues () {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_ALPHA_VARIANT}"

    # The kernel ARCH:

    CT_KERNEL_ARCH=${CT_ARCH}

}