Passing by reference

src/CMakeLists.txt

@@ -25,9 +25,9 @@ SET(rtklib_src
 
 # application header files
 SET(headers
-    ../include/gnss_utils.h
-    ../include/observations.h
-    ../include/navigation.h)
+    ../include/gnss_utils/gnss_utils.h
+    ../include/gnss_utils/observations.h
+    ../include/gnss_utils/navigation.h)
 
 # Eigen #######
 FIND_PACKAGE(Eigen3 REQUIRED)

src/gnss_utils.cpp

@@ -2,7 +2,7 @@
 
 using namespace GNSSUtils;
 
-static int getPos(Observations observations, Navigation navigation, sol_t sol)
+static int getPos(Observations & observations, Navigation & navigation, sol_t sol)
 {
   // Define observations
   std::vector<obsd_t> obs = observations.getObservations();