configure: rework setting of privops macros

Prepare a list of required privileged operations first and from that
define the PRIVOPS macros. This will reduce the amount of code that will
be needed when the privileged helper is used on other platforms.

configure

@@ -202,6 +202,7 @@ try_libcap=-1
 try_clockctl=0
 feat_scfilter=0
 try_seccomp=-1
+priv_ops=""
 readline_lib=""
 readline_inc=""
 ncurses_lib=""
@@ -393,12 +394,8 @@ case $OPERATINGSYSTEM in
         EXTRA_CLI_LIBS="-lresolv"
         add_def MACOSX
         if [ $feat_droproot = "1" ]; then
-          EXTRA_OBJECTS="$EXTRA_OBJECTS privops.o"
-          add_def PRIVOPS_ADJUSTTIME
-          add_def PRIVOPS_SETTIME
-          add_def PRIVOPS_BINDSOCKET
-          add_def PRIVOPS_HELPER
           add_def FEAT_PRIVDROP
+          priv_ops="ADJUSTTIME SETTIME BINDSOCKET"
         fi
         echo "Configuring for MacOS X (" $SYSTEM "MacOS X version" $VERSION ")"
     ;;
@@ -627,6 +624,14 @@ then
   EXTRA_LIBS="$EXTRA_LIBS -lseccomp"
 fi
 
+if [ "x$priv_ops" != "x" ]; then
+  EXTRA_OBJECTS="$EXTRA_OBJECTS privops.o"
+  add_def PRIVOPS_HELPER
+  for o in $priv_ops; do
+    add_def PRIVOPS_$o
+  done
+fi
+
 if [ $feat_rtc = "1" ] && [ $try_rtc = "1" ] && \
   test_code '<linux/rtc.h>' 'sys/ioctl.h linux/rtc.h' '' '' \
     'ioctl(1, RTC_UIE_ON&RTC_UIE_OFF&RTC_RD_TIME&RTC_SET_TIME, 0&RTC_UF);'