[Fortran-Experiments] Merge to r120360

[Christopher D. Rickett]

>> gfortran compiles the following without any error/warning:
>> -----------------------
>> subroutine var  bind(c)
>> end subroutine var
>> -----------------------
>> I think this is invalid and one needs to add a "()", i.e. "subroutine
>> var ()  bind(c)". (cf. R1232 in "12.5.2.2 Subroutine subprogram").
>
> i didn't think that this was an error.  the syntax rule for subroutine-stmt 
> and constraints listed in the annex D didn't specify that the parens are 
> required if you have bind(c) (at least not that i see).  do you know of a 
> location where the standard makes the requirement?
>

you are correct; i did not read the syntax rule close enough.  the parens 
are not optional if bind(c) is given.  thanks for pointing that out.

Chris