-PATH="$abs_top_srcdir/build-aux":$PATH
-export PATH
-
-if ( diff --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
- compare() { diff -u "$@"; }
-elif ( cmp --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
- compare() { cmp -s "$@"; }
-else
- compare() { cmp "$@"; }
-fi