[Bug fortran/52884] double precision constants promoted to 16 byte by -fdefault-real-8

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52884

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jvdelisle at gcc dot gnu.org

--- Comment #3 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
May I suggest the following wording:

-fdefault-real-8
    Set the default real type to an 8 byte wide type. This option
    also affects the kind of non-double real constants like 1.0.
    This option promotes the default width of DOUBLE PRECISION
    and double real constants like 1.d0 to 16 bytes if possible.
    If -fdefault-double-8 is given along with -fdefault-real-8,
    DOUBLE PRECISION and double real constants are not promoted.
    Note, -fdefault-real-8, does not promote variables with explicit
    kind declarations.

-fdefault-double-8
    Set the DOUBLE PRECISION type to an 8 byte wide type. Do nothing
    if this is already the default. This option prevents -fdefault-real-8
    from promoting DOUBLE PRECISION and double real constants like 1.d0
    to 16 bytes.