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### 8.191 `PERROR` — Print system error message

Description:
  Prints (on the C `stderr` stream) a newline-terminated error message corresponding to the last system error. This is prefixed by STRING, a colon and a space. See `perror(3)`.
Standard:
  GNU extension
Class:
  Subroutine
Syntax:
  `CALL PERROR(STRING)`
Arguments:

  STRING | A scalar of type `CHARACTER` and of the default kind.

See also:
  IERRNO