Fix compilation on FreeBSD

CMakeLists.txt

@@ -24,6 +24,11 @@ set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
 
 include_directories(.)
+if(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+  include_directories(/usr/local/include)
+  link_directories(/usr/local/lib)
+endif()
+
 if(APPLE)
   include_directories(
     /opt/local/include 

web/httpserver.h

@@ -25,7 +25,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <cstdint>
 
 #include <arpa/inet.h>
+#include <sys/socket.h>
 #include <sys/un.h>
+#include <netinet/in.h>
 
 class HttpServer
 {

zeroconf/networkhotplugnotifier.cpp

@@ -28,14 +28,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <netinet/in.h>
 #if __FreeBSD__
 #include <netlink/netlink.h>
-#include <netlink/rtnetlink.h>
+#include <netlink/netlink_route.h>
 #else
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #endif
 #include <net/if.h>
 #endif // !__APPLE__
 
+#include <string.h>
+
 struct NetworkHotplugNotifier::Private
 {
   std::thread mThread;
@@ -48,7 +50,8 @@ struct NetworkHotplugNotifier::Private
 #if !__APPLE__
     int fds[2];
     if (::pipe(fds) < 0) {
-        std::cerr << "Could not create socket pair " << errno << std::endl;
+        std::cerr << "Could not create socket pair " 
+                  << ::strerror(errno) << std::endl;
         return;
     }
     mPipeReadFd = fds[0];
@@ -73,7 +76,8 @@ struct NetworkHotplugNotifier::Private
 #if !__APPLE__
     int sock = ::socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
     if (sock < 0) {
-      std::cerr << "Could not create netlink socket: " << errno << std::endl;
+      std::cerr << "Could not create netlink socket: "
+                << ::strerror(errno) << std::endl;
       return;
     }