1 dnl AX_COPY_IF_CHANGE(source, dest) 2 dnl copy source to dest if they don't compare equally or if dest doesn't exist 3 AC_DEFUN([AX_COPY_IF_CHANGE], [ 4 if test -r $2; then 5 if cmp $1 $2 > /dev/null; then 6 echo $2 is unchanged 7 else 8 cp -f $1 $2 9 fi 10 else 11 cp -f $1 $2 12 fi 13 ]) 14
