+# Check whether --enable-apop or --disable-apop was given.
+if test "${enable_apop+set}" = set; then
+ enableval="$enable_apop"
+ :
+fi
+
+if test x"$enable_apop" = x"yes"; then
+ cat >> confdefs.h <<\EOF
+#define APOP 1
+EOF
+ APOPLIB=md5.o
+ enable_pop=yes
+fi
+