smart-autogen.sh

#!/bin/sh

srcdir=${srcdir:-.}
set -ux

AUTOGEN_INPUT_CHECKSUM=`cat $srcdir/configure.ac $srcdir/aclocal.m4 | md5sum | cut -b 1-32`

CHECKSUM_FILE=autogen.checksum

if test `cat $CHECKSUM_FILE`"" = "$AUTOGEN_INPUT_CHECKSUM"; then
  exit 0
fi

( set +ux; echo Invoking autogen.sh...; ${srcdir}/autogen.sh "$@" ) || exit 1
printf "%s" $AUTOGEN_INPUT_CHECKSUM > $CHECKSUM_FILE