| dnl AX_COPY_IF_CHANGE(source, dest) | |
| dnl copy source to dest if they don't compare equally or if dest doesn't exist | |
| AC_DEFUN([AX_COPY_IF_CHANGE], [ | |
| if test -r $2; then | |
| if cmp $1 $2 > /dev/null; then | |
| echo $2 is unchanged | |
| else | |
| cp -f $1 $2 | |
| fi | |
| else | |
| cp -f $1 $2 | |
| fi | |
| ]) |