https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117381
--- Comment #7 from kargls at comcast dot net ---
(In reply to anlauf from comment #5)
> While Nvidia and flang seem to allow the sample code, even the latest
> Intel ifx 2025.0 rejects it:
>
> pr117381.f90(5): error #6439: This symbol has too many characters.
> [VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERAT]
> integer ::
> VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR = 1
> -------------^
> compilation aborted for pr117381.f90 (code 1)
>
>
> With the following patch we could adjust the documentation:
>
> diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
> index ff4040732d8..b25976c7026 100644
> --- a/gcc/fortran/invoke.texi
> +++ b/gcc/fortran/invoke.texi
> @@ -407,8 +407,9 @@ lines in the source file. The default value is 132.
>
> @opindex fmax-identifier-length=@var{n}
> @item -fmax-identifier-length=@var{n}
> -Specify the maximum allowed identifier length. Typical values are
> -31 (Fortran 95) and 63 (Fortran 2003 and later).
> +Specify the maximum allowed identifier length. Standard values are
> +31 (Fortran 95) and 63 (Fortran 2003 and later). Values larger than
> +63 are not supported.
>
> @opindex fimplicit-none
> @item -fimplicit-none
I was making a similar change, then discovered that one can
use -fmax-identifier-length=0. I gets a lot of errors. :-).
I have a patch building at the moment that checks that the
specified value is not less than 6, which is the old Fortran
77 limit.
