Fix multiple definitions

vic/drivers/cesm/src/vic_cesm_start.c

@@ -4,6 +4,7 @@
  * These routine handles the startup tasks for the CESM driver.
  *****************************************************************************/
 
+#define _MAIN_
 #include <ctype.h>  // Do we need this line?
 #include <vic_driver_cesm.h>
 

vic/drivers/classic/src/vic_classic.c

@@ -4,6 +4,7 @@
  * Classic driver of the VIC model
  *****************************************************************************/
 
+#define _MAIN_
 #include <vic_driver_classic.h>
 
 // global variables

vic/drivers/image/src/vic_image.c

@@ -4,6 +4,7 @@
  * Stand-alone image mode driver of the VIC model
  *****************************************************************************/
 
+#define _MAIN_
 #include <vic_driver_image.h>
 #include <rout.h>   // Routing routine (extension)
 

vic/drivers/python/src/globals.c

@@ -5,6 +5,7 @@
  * level.
  *****************************************************************************/
 
+#define _MAIN_
 #include <vic_driver_python.h>
 
 // global variables

vic/vic_run/include/vic_def.h

@@ -69,11 +69,17 @@
 #define min(a, b) (a < b) ? a : b
 #define max(a, b) (a > b) ? a : b
 
+#ifdef _MAIN_
+#define GLOBAL
+#else
+#define GLOBAL extern
+#endif
+
 extern size_t NR;       /**< array index for force struct that indicates
                              the model step avarage or sum */
 extern size_t NF;       /**< array index loop counter limit for force
                              struct that indicates the SNOW_STEP values */
-char          vic_run_ref_str[MAXSTRING];
+GLOBAL char          vic_run_ref_str[MAXSTRING];
 
 /******************************************************************************
  * @brief   Snow Density parametrizations

vic/vic_run/include/vic_log.h

@@ -58,7 +58,13 @@
 #define LOG_LVL 25
 #endif
 
-FILE *LOG_DEST;
+#ifdef _MAIN_
+#define GLOBAL
+#else
+#define GLOBAL extern
+#endif
+
+GLOBAL FILE *LOG_DEST;
 
 void finalize_logging(void);
 void get_logname(const char *path, int id, char *filename);

vic/vic_run/include/vic_run.h

@@ -9,6 +9,12 @@
 
 #include <vic_def.h>
 
+#ifdef _MAIN_
+#define GLOBAL
+#else
+#define GLOBAL extern
+#endif
+
 void advect_carbon_storage(double, double, lake_var_struct *,
                            cell_data_struct *);
 void advect_snow_storage(double, double, double, snow_data_struct *);
@@ -154,7 +160,7 @@ double func_atmos_energy_bal(double, va_list);
 double func_atmos_moist_bal(double, va_list);
 double func_canopy_energy_bal(double, va_list);
 double func_surf_energy_bal(double, va_list);
-double (*funcd)(double z, double es, double Wind, double AirDens, double ZO,
+GLOBAL double (*funcd)(double z, double es, double Wind, double AirDens, double ZO,
                 double EactAir, double F, double hsalt, double phi_r,
                 double ushear,
                 double Zrh);