Returns the last system error number, as given by the C errno
variable.
GNU extension
Function
RESULT = IERRNO()
None
The return value is of type INTEGER
and of the default integer kind.
© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gfortran/IERRNO.html