fix for OS where avahi is not present

Change-Id: Ib3e21b786821baa7c3c47755de5125e1de566c39

sd/CppunitTest_sd_uimpress.mk

@@ -72,13 +72,21 @@ $(eval $(call gb_CppunitTest_use_system_darwin_frameworks,sd_uimpress,\
 endif
 
 ifeq ($(OS), LINUX)
-$(eval $(call gb_CppunitTest_use_externals,sd_uimpress,\
-	boost_headers \
-        gtk \
-        dbus \
-        avahi \
+ifeq ($(ENABLE_AVAHI),TRUE)
+$(eval $(call gb_Library_use_externals,sd,\
+    boost_headers \
+    gtk \
+    dbus \
+    avahi \
 ))
 else
+$(eval $(call gb_Library_use_externals,sd,\
+    boost_headers \
+    gtk \
+    dbus \
+))
+endif
+else
 $(eval $(call gb_CppunitTest_use_externals,sd_uimpress,\
 	boost_headers \
         gtk \

sd/Library_sd.mk

@@ -95,6 +95,7 @@ $(eval $(call gb_Library_use_libraries,sd,\
 ))
 
 ifeq ($(OS), LINUX)
+ifeq ($(ENABLE_AVAHI),TRUE)
 $(eval $(call gb_Library_use_externals,sd,\
 	boost_headers \
 	libxml2 \
@@ -108,6 +109,13 @@ $(eval $(call gb_Library_use_externals,sd,\
 	dbus \
 ))
 endif
+else
+$(eval $(call gb_Library_use_externals,sd,\
+	boost_headers \
+	libxml2 \
+	dbus \
+))
+endif
 
 ifeq ($(OS),WNT)
 $(eval $(call gb_Library_use_system_win32_libs,sd,\

sd/source/ui/remotecontrol/DiscoveryService.cxx

@@ -10,7 +10,6 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 #include <algorithm>
 #include <vector>
 #include <iostream>
@@ -29,6 +28,7 @@
   #include <ws2tcpip.h>
   typedef int socklen_t;
 #else
+  #include <unistd.h>
   #include <sys/types.h>
   #include <sys/socket.h>
   #include <netinet/in.h>
@@ -58,12 +58,14 @@ DiscoveryService::DiscoveryService()
     zService = new OSXNetworkService();
 #endif
 #ifdef LINUX
+    #ifdef ENABLE_AVAHI
     // Avahi for Linux
     char hostname[1024];
     hostname[1023] = '\0';
     gethostname(hostname, 1023);
 
     zService = new AvahiNetworkService(hostname);
+    #endif
 #endif
 
     zService->setup();