(g77.info.gz) Ugly Integer Conversions

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 Ugly Integer Conversions
 ------------------------
 
    The constructs enabled via `-fugly-logint' are:
 
    * Automatic conversion between `INTEGER' and `LOGICAL' as dictated by
      context (typically implies nonportable dependencies on how a
      particular implementation encodes `.TRUE.' and `.FALSE.').
 
    * Use of a `LOGICAL' variable in `ASSIGN' and assigned-`GOTO'
      statements.
 
    The above constructs are disabled by default because use of them
 tends to lead to non-portable code.  Even existing Fortran code that
 uses that often turns out to be non-portable, if not outright buggy.
 
    Some of this is due to differences among implementations as far as
 how `.TRUE.' and `.FALSE.' are encoded as `INTEGER' values--Fortran
 code that assumes a particular coding is likely to use one of the above
 constructs, and is also likely to not work correctly on implementations
 using different encodings.
 
     Equivalence Versus Equality, for more information.
 

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