extern Hear it!

extern Definition

ex·tern (eks′tʉrn′)

noun

a person connected with, but not living in, an institution, as a nonresident doctor in a hospital

Etymology: Fr externe < L externus: see external

extern Usage Examples

Converse of object

  • use: Other storage class specifiers You will see static and extern used commonly.

Modifies a noun

  • errno: The POSIX standard says " ... which is defined as extern int errno; " An implementation specification.
  • int: The POSIX standard says " ... which is defined as extern int errno; " An implementation specification.
  • declaration: The actual variable must only be defined once in the whole program -- you can have as many extern declarations as needed.
  • keyword: You can explicitly state that an identifier has external linkage by defining it with the extern keyword.
  • variable: Note that, as in character I/O drivers, extern variables are assigned values in the master file when configuring drivers or modules.