https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117381
kargls at comcast dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargls at comcast dot net
--- Comment #4 from kargls at comcast dot net ---
(In reply to Jordan from comment #3)
> I tested this:
>
> program main
> use, intrinsic :: iso_c_binding
> implicit none
>
> integer ::
> VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR = 1
> end program main
>
> with:
> gfortran -std=f95 -fmax-identifier-length=80 ./app/main.f90
>
> with result:
> f951: Fatal Error: Maximum supported identifier length is 63
> compilation terminated.
The option should likely by removed or the documentation improved.
It can be set to any value up to and including 63. Anything larger
will not work.
% cd gcc/gcc/fortran
% grep GFC_MAX_SYMBOL_LEN *.cc | grep + | wc -l
149
There are 149 instances of the symbol and many of those
appear in declarations of buffers such as in match.cc
/* Match an ELSE IF statement. */
match
gfc_match_elseif (void)
{
char name[GFC_MAX_SYMBOL_LEN + 1];
As a side note, the Fortran 2023 standard has a numbered constraint
F2023:C601 (R603) The maximum length of a name is 63 characters.
which means a Fortran compiler is oblige to detect and report the
issue.
As an additional side note, you don't need to create a custom vulkan.
You can create a custom gfortran with this patch.
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index dd599bc97a2..85f0597bed0 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -54,7 +54,7 @@ not after.
/* Major control parameters. */
-#define GFC_MAX_SYMBOL_LEN 63 /* Must be at least 63 for F2003. */
+#define GFC_MAX_SYMBOL_LEN 127 /* Must be at least 63 for F2003. */
#define GFC_LETTERS 26 /* Number of letters in the alphabet. */
#define MAX_SUBRECORD_LENGTH 2147483639 /* 2**31-9 */
Change 127 to whatever you want.
