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MClock()
MClock: INTEGER(KIND=1) function.
Intrinsic groups: unix.
Description:
Returns the number of clock ticks since the start of the process.
Supported on systems with clock(3) (q.v.).
This intrinsic is not fully portable, such as to systems
with 32-bit INTEGER types but supporting times
wider than 32 bits.
Therefore, the values returned by this intrinsic
might be, or become, negative,
or numerically less than previous values,
during a single run of the compiled program.
See MClock8 Intrinsic, for information on a similar intrinsic that might be portable to more GNU Fortran implementations, though to fewer Fortran compilers.
If the system does not support clock(3),
-1 is returned.