Create and use sicsglobal.h and add isDuringInitialization

macro.c

@@ -68,6 +68,7 @@
 #include "ifile.h"
 #include "Dbg.h"
 #include "servlog.h"
+#include "sicsglobal.h"
 #include "stringdict.h"
 #include "exeman.h"
 #include "nxcopy.h"
@@ -323,7 +324,6 @@ Tcl_Interp *MacroInit(SicsInterp * pSics)
   assert(pSics);
 
   /* create interpreter and unknown */
-  extern const char *argv0;
   Tcl_FindExecutable(argv0);
   pInter = Tcl_CreateInterp();
   pUnknown = (struct __SicsUnknown *) malloc(sizeof(struct __SicsUnknown));