Added static function to get fix

Findgnss_utils.cmake

 #edit the following line to add the librarie's header files
-FIND_PATH(gnss_utils_INCLUDE_DIR gnss_utils.h /usr/include/iridrivers /usr/local/lib)
+FIND_PATH(gnss_utils_INCLUDE_DIR observations.h navigation.h /usr/include/iridrivers /usr/local/lib)
 
 FIND_LIBRARY(gnss_utils_LIBRARY
     NAMES gnss_utils

src/CMakeLists.txt

@@ -4,7 +4,7 @@ set(rtklib_src_dir ${rtklib_dir}/src)
 
 # driver source files
 SET(sources
-    gnss_utils.cpp
+    getPos.cpp
     observations.cpp
     navigation.cpp)
 

src/getPos.cpp

-#include "../include/gnss_utils.h"
+#include "../include/getPos.h"
 
 using namespace GNSSUtils;