Sharing global variables

While not recommended, you can share global variables declared in your program with a C module.

In order to share the global variables declared in your program, you must:

1. Generate the .c and .h interface files by using fglcomp -G with the module defining the global variables:

   GLOBALS
   DEFINE g_name CHAR(100)
   END GLOBALS

   fglcomp -G myglobals.4gl

   This will produce two files named myglobals.h and myglobals.c.

2. In the C module, include the generated header file and use the global variables directly:

   #include <string.h>
   #include "f2c/fglExt.h"
   #include "myglobals.h"
   
   int myfunc1(int c)
   {
      strcpy(g_name, "new name");
      return 0;
   }

3. When creating the C-Extension library, compile and link with the myglobals.c generated file.