bootstrap/7132: IEEE_COMPLEX_DIVIDE defined on VAX target

[toon@gcc.gnu.org]

Synopsis: IEEE_COMPLEX_DIVIDE defined on VAX target

Responsible-Changed-From-To: unassigned->toon
Responsible-Changed-By: toon
Responsible-Changed-When: Wed Jun 26 12:57:57 2002
Responsible-Changed-Why:
    Fortran Maintainer
State-Changed-From-To: open->feedback
State-Changed-By: toon
State-Changed-When: Wed Jun 26 12:57:57 2002
State-Changed-Why:
    IEEE_COMPLEX_DIVIDE causes the COMPLEX and DOUBLE COMPLEX
    divide routines in libf2c to honor the *hardware* treatment
    of x/0.0 with x != 0.0.  This is the obvious choice when
    running on IEEE-754 compliant hardware, but might be a
    good choice on VAX too.
    
    Please advice.
    
    Note that complex division is generally expanded inline
    by the Fortran front-end, unless -Os is given as a
    command line option.

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