Used to define the prototypes for functions or variables that are to be exported from a shared library.
Syntax
#include <prtypes.h> PR_EXTERN(type)prototype
Description
PR_EXTERN is used to define externally visible routines and globals. For syntax details for each platform, see prtypes.h. The macro includes the proper specifications to declare the target extern and set up other required linkages.
Warning: Some platforms do not allow the use of the underscore character (_) as the first character of an exported symbol.