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PARAMETER Statements
g77 doesn't allow intrinsics in PARAMETER statements.
Related to this, g77 doesn't allow non-integral
exponentiation in PARAMETER statements, such as
PARAMETER (R=2**.25).
It is unlikely g77 will ever support this feature,
as doing it properly requires complete emulation of
a target computer's floating-point facilities when
building g77 as a cross-compiler.
But, if the gcc back end is enhanced to provide
such a facility, g77 will likely use that facility
in implementing this feature soon afterwards.