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)
.
GNU extension
Subroutine
CALL PERROR(STRING)
STRING | A scalar of type CHARACTER and of the default kind. |
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gfortran/PERROR.html