definitions of global variables in CAIVS tool shifted to caivs.c and declared...

definitions of global variables in CAIVS tool shifted to caivs.c and declared extern in header caivs.h to avoid using -fcommon option when compiling with gcc 10.

caivs/caivs.c

@@ -19,6 +19,12 @@
 
 #include <caivs.h>
 
+/* GLOBAL VARIABLES --------------------------------------------------------- */
+char _IODIR[BUFS]; /* I/O DIRECTORY              */
+FILE *_FLOG;       /* LOG FILE POINTER           */
+CTL _C;            /* NIRVANA CONTROL PARAMETERS */
+CCTL _CC;          /* CAIVS CONTROL PARAMETERS   */
+
 
 /*############################################################################*/
 

caivs/caivs.h

@@ -115,11 +115,11 @@ typedef struct /* CAIVS CONTROL PARAMETERS */
 
 #include <prototypesC.h> /* PUBLIC FUNCTIONS PROTOTYPES */
 
-/* PUBLIC VARIABLES --------------------------------------------------------- */
-char _IODIR[BUFS]; /* I/O DIRECTORY              */
-FILE *_FLOG;       /* LOG FILE POINTER           */
-CTL _C;            /* NIRVANA CONTROL PARAMETERS */
-CCTL _CC;          /* CAIVS CONTROL PARAMETERS   */
+/* GLOBAL VARIABLES --------------------------------------------------------- */
+extern char _IODIR[BUFS]; /* I/O DIRECTORY              */
+extern FILE *_FLOG;       /* LOG FILE POINTER           */
+extern CTL _C;            /* NIRVANA CONTROL PARAMETERS */
+extern CCTL _CC;          /* CAIVS CONTROL PARAMETERS   */
 /* LABELS */
 static char *lcoord[3][3]={{"x","y","z"},{"z","R","phi"},{"r","theta","phi"}},
             *lvf[3][3]={{"vx","vy","vz"},{"vz","vR","vphi"},{"vr","vtheta","vphi"}},