__librel()

The __librel() function retrieves the XL C/C++ runtime library release level. The value returned by __librel() can be tested to determine if you can use new or extended functions that are available in a particular release. For example, snprintf(), dlopen(), and __superkill() are functions available in a particular release. Before using any of these functions, you can test the Language Environment version to make sure you are running on the release of Language Environment that supports them. For more information about the __librel() function, see __librel() — Query release level in z/OS® XL C®/C++ Runtime Library Reference.