Fortran: Documentation update on -fdefault-real-8 and family

	PR fortran/122957

gcc/fortran/ChangeLog:

	* invoke.texi: Add note that these features are incompatible
	with user defined derived type I/O. (DTIO)

diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index 0f92f325a701ac38cf2c6311605c41d6918747b3..549c45032fdc344f6d5407b39b2cb4a0120d006d 100644 (file)
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -592,6 +592,8 @@ BOZ literal constant conversion, and I/O and calls to intrinsic procedures
 when passing a value to the @code{kind=} dummy argument.  Inspection of the
 intermediate representation of the translated Fortran code, produced by
 @option{-fdump-fortran-original} or @option{-fdump-tree-original}, is suggested.
+NOTE: These options are incompatible with user defined derived
+type I/O (DTIO).
 
 @opindex std=@var{std}
 @item -std=@var{std}