[Client] Compile-time option ENABLE_RECEIVE_POSITION

Enables or disables the -l option at compile-time.

owlps-client/Makefile

@@ -39,15 +39,18 @@ XCFLAGS = $(CFLAGS) $(DEPFLAGS) $(WARN) $(HEADERS)
 PICFLAG = -fPIC
 OWLPSFLAGS = -D OWLPS_VERSION=\"$(OWLPS_VERSION)\"
 OWLPSFLAGS += -D DEBUG
-LIBS = -L$(LIBOWLPS_DIR) -lowlps \
-	-L$(LIBOWLPSCLIENT_DIR) -lowlps-client \
+OWLPSFLAGS += -D ENABLE_RECEIVE_POSITION \
 	-L$(LIBOWLPSRESULTREADER_DIR) -lowlps-resultreader
+LIBS = -L$(LIBOWLPS_DIR) -lowlps \
+	-L$(LIBOWLPSCLIENT_DIR) -lowlps-client
 
 OS := $(shell uname)
 ifeq ("$(OS)", "Linux")
 	LIBS += -lrt
 endif
 
+LDFLAGS = $(LIBS) $(OWLPSFLAGS)
+
 STATIC_LIBS =
 
 
@@ -63,7 +66,7 @@ all : dynamic static
 %: %.c
 
 %: %.o
-	$(CC) $(LDFLAGS) $(STRIPFLAGS) $(XCFLAGS) -o $@ $^ $(LIBS)
+	$(CC) $(STRIPFLAGS) $(XCFLAGS) -o $@ $^ $(LDFLAGS)
 %.static: %.o
 	$(CC) $(STRIPFLAGS) $(XCFLAGS) -o $@ $^ \
 		$(LDFLAGS) $(LIBS) $(STATIC_LIBS) -static

owlps-client/owlps-client.c

@@ -3,7 +3,10 @@
  */
 
 #include <owlps-client.h>
-#include <owlps-resultreader.h>
+
+#ifdef ENABLE_RECEIVE_POSITION
+# include <owlps-resultreader.h>
+#endif // ENABLE_RECEIVE_POSITION
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -42,7 +45,9 @@ void print_configuration(void) ;
 void create_socket(void) ;
 void make_packet(void) ;
 void send_request(void) ;
+#ifdef ENABLE_RECEIVE_POSITION
 int receive_position(void) ;
+#endif // ENABLE_RECEIVE_POSITION
 void print_usage(void) ;
 void print_version(void) ;
 
@@ -122,8 +127,10 @@ int main(int argc, char *argv[])
 
   close(sockfd) ;
 
+#ifdef ENABLE_RECEIVE_POSITION
   if (options.listening_port > 0)
     ret = receive_position() ;
+#endif // ENABLE_RECEIVE_POSITION
 
   return ret ;
 }
@@ -187,6 +194,7 @@ void parse_main_options(int argc, char **argv)
           strncpy(options.dest_ip, optarg, INET_ADDRSTRLEN) ;
           break ;
         case 'l' :
+#ifdef ENABLE_RECEIVE_POSITION
           /* Facultative getopt options do not handle separated values
            * (like -l <port>), so we have to test separately.
            */
@@ -207,6 +215,11 @@ void parse_main_options(int argc, char **argv)
                   ++optind ;
                 }
             }
+#else // ENABLE_RECEIVE_POSITION
+          fprintf(stderr, "Warning! The program was compiled without"
+                  " enabling the -l option (receive the position from"
+                  " the positioning server).\n") ;
+#endif // ENABLE_RECEIVE_POSITION
           break ;
         case 'n' :
           options.nb_pkt = strtoul(optarg, NULL, 0) ;
@@ -477,6 +490,7 @@ void make_packet()
 
 
 
+#ifdef ENABLE_RECEIVE_POSITION
 /*
  * Receives a position computed by the infrastructure.
  * Note that it is currently not guaranteed that the received result
@@ -503,6 +517,7 @@ int receive_position()
 
   return 0 ;
 }
+#endif // ENABLE_RECEIVE_POSITION
 
 
 
@@ -550,8 +565,8 @@ void print_usage()
          "\t-D\t\tDaemon mode. Useful only in flood mode.\n"
          "\t-l [port]\tWait for the computed position and display it."
          " The Optional argument <port> allows to specify the listening"
-         " port (default: %d).\n"
-         ,
+         " port (default: %d). Available only if the program was"
+         " compiled with the option ENABLE_RECEIVE_POSITION.\n",
          program_name,
          program_name,
          OWL_DEFAULT_REQUEST_PORT,
@@ -569,11 +584,19 @@ void print_version()
 {
   printf("This is OwlPS Client, part of the Open Wireless"
          " Positioning System project.\n"
-         "Version: %s.\n",
+         "Version: %s.\n"
+         "Compilation-time options:\n"
+         "\tOption -l: %s.\n",
 #ifdef OWLPS_VERSION
          OWLPS_VERSION
 #else // OWLPS_VERSION
          "unknown version"
 #endif // OWLPS_VERSION
+         ,
+#ifdef ENABLE_RECEIVE_POSITION
+         "YES"
+#else // ENABLE_RECEIVE_POSITION
+         "NO"
+#endif // ENABLE_RECEIVE_POSITION
          ) ;
 }