Function storage class specifiers

For a function, the storage class specifier determines the linkage of the function. By default, function definitions have external linkage, and can be called by functions defined in other files. C only An exception is inline functions, which are treated by default as having internal linkage; see Linkage of inline functions for more information.

A storage class specifier may be used in both function declarations and definitions. The only storage class options for functions are: