(g77.info.gz) Fortran 90

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 Fortran 90
 ==========
 
    The GNU Fortran language includes a number of features that are part
 of Fortran 90, even when the `-ff90' option is not specified.  The
 features enabled by `-ff90' are intended to be those that, when `-ff90'
 is not specified, would have another meaning to `g77'--usually meaning
 something invalid in the GNU Fortran language.
 
    So, the purpose of `-ff90' is not to specify whether `g77' is to
 gratuitously reject Fortran 90 constructs.  The `-pedantic' option
 specified with `-fno-f90' is intended to do that, although its
 implementation is certainly incomplete at this point.
 
    When `-ff90' is specified:
 
    * The type of `REAL(EXPR)' and `AIMAG(EXPR)', where EXPR is
      `COMPLEX' type, is the same type as the real part of EXPR.
 
      For example, assuming `Z' is type `COMPLEX(KIND=2)', `REAL(Z)'
      would return a value of type `REAL(KIND=2)', not of type
      `REAL(KIND=1)', since `-ff90' is specified.
 

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(g77.info.gz) VXT Fortran

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(g77.info.gz) Pedantic Compilation