https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117381
--- Comment #5 from anlauf at gcc dot gnu.org ---
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
