Fix compilation warning/errors for OpenWrt

In lib-resultreader and Positioner.

libowlps-resultreader/libowlps-resultreader.c

@@ -41,6 +41,9 @@
  */
 
 
+#define _GNU_SOURCE // for strndup()
+
+
 #include "owlps-resultreader.h"
 
 #include <string.h>

owlps-positioner/Makefile

@@ -17,7 +17,7 @@ TESTSCXXFLAGS = -I$(TESTS_DIR) -I$(SRC_DIR) -I.
 
 ## Additional libraries ##
 
-LDFLAGS += -lstdc++ -lm -lboost_program_options -lowlps
+LDFLAGS += -lstdc++ -lm -lboost_program_options -pthread -lowlps
 OS := $(shell uname)
 ifeq "$(OS)" "Linux"
 	LDFLAGS += -lrt

owlps-positioner/src/posutil.hh

@@ -46,6 +46,7 @@ class Measurement ;
 
 #include <boost/tr1/unordered_map.hpp>
 #include <boost/algorithm/string/case_conv.hpp>
+#include <stdint.h> // <cstdint> is not C++ 98 compliant
 
 /// Utilitary class
 class PosUtil