Hi,
The following patch is an update of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52884#c3,
I am planning to commit with a suitable ChangeLog if there is no objection.
Tested on darwin.
TIA
Dominique
--- ../_clean/gcc/fortran/invoke.texi 2019-01-19 22:48:32.000000000 +0100
+++ gcc/fortran/invoke.texi 2019-01-27 15:06:11.000000000 +0100
@@ -416,36 +416,45 @@ kind declaration.
@item -fdefault-real-8
@opindex @code{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 @code{1.0}, and does promote
-the default width of @code{DOUBLE PRECISION} to 16 bytes if possible, unless
-@code{-fdefault-double-8} is given, too. Unlike @option{-freal-4-real-8},
-it does not promote variables with explicit kind declaration.
+Set the default real type to an 8 byte wide type. This option also affects
+the kind of non-double real constants like @code{1.0}. This option promotes
+the default width of @code{DOUBLE PRECISION} and double real constants
+like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
+is given along with @code{fdefault-real-8}, @code{DOUBLE PRECISION}
+and double real constants are not promoted. Unlike @option{-freal-4-real-8},
+@code{fdefault-real-8} does not promote variables with explicit kind
+declarations.
@item -fdefault-real-10
@opindex @code{fdefault-real-10}
-Set the default real type to a 10 byte wide type. This option also affects
-the kind of non-double real constants like @code{1.0}, and does promote
-the default width of @code{DOUBLE PRECISION} to 16 bytes if possible, unless
-@code{-fdefault-double-8} is given. Unlike @option{-freal-4-real-10},
-it does not promote variables with explicit kind declaration.
+Set the default real type to an 10 byte wide type. This option also affects
+the kind of non-double real constants like @code{1.0}. This option promotes
+the default width of @code{DOUBLE PRECISION} and double real constants
+like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
+is given along with @code{fdefault-real-10}, @code{DOUBLE PRECISION}
+and double real constants are not promoted. Unlike @option{-freal-4-real-10},
+@code{fdefault-real-10} does not promote variables with explicit kind
+declarations.
@item -fdefault-real-16
@opindex @code{fdefault-real-16}
-Set the default real type to a 16 byte wide type. This option also affects
-the kind of non-double real constants like @code{1.0}, and does promote
-the default width of @code{DOUBLE PRECISION} to 16 bytes if possible, unless
-@code{-fdefault-double-8} is given. Unlike @option{-freal-4-real-16},
-it does not promote variables with explicit kind declaration.
+Set the default real type to an 16 byte wide type. This option also affects
+the kind of non-double real constants like @code{1.0}. This option promotes
+the default width of @code{DOUBLE PRECISION} and double real constants
+like @code{1.d0} to 16 bytes if possible. If @code{-fdefault-double-8}
+is given along with @code{fdefault-real-16}, @code{DOUBLE PRECISION}
+and double real constants are not promoted. Unlike @option{-freal-4-real-16},
+@code{fdefault-real-16} does not promote variables with explicit kind
+declarations.
@item -fdefault-double-8
@opindex @code{fdefault-double-8}
-Set the @code{DOUBLE PRECISION} type to an 8 byte wide type. Do nothing if
this
-is already the default. If @option{-fdefault-real-8} is given,
-@code{DOUBLE PRECISION} would instead be promoted to 16 bytes if possible, and
-@option{-fdefault-double-8} can be used to prevent this. The kind of real
-constants like @code{1.d0} will not be changed by @option{-fdefault-real-8}
-though, so also @option{-fdefault-double-8} does not affect it.
+Set the @code{DOUBLE PRECISION} type and double real constants
+like @code{1.d0} to an 8 byte wide type. Do nothing if this
+is already the default. This option prevents @option{-fdefault-real-8},
+@option{-fdefault-real-10}, and @option{-fdefault-real-16},
+from promoting @code{DOUBLE PRECISION} and double real constants like
+@code{1.d0} to 16 bytes.
@item -finteger-4-integer-8
@opindex @code{finteger-4-integer-8}
