[patch, libfortran] Fix PR 123446, broken bootstrap

[Hans-Peter Nilsson]

> Date: Thu, 8 Jan 2026 08:06:55 +0100
> From: Thomas Koenig <tkoenig@netcologne.de>
> 
> 

> I just realized that it is possible to run a check by #undef - ing
>   __GTHREADS_CXX0X in async.h.  Doing so promptly found another
> syntax error, which this version of the patch fixes.

But to what version should that patch be applied?
It has near the top:

+++ b/gcc/fortran/libgfortran.h
@@ -143,6 +143,7 @@ typedef enum
   LIBERROR_INQUIRE_INTERNAL_UNIT, /* Must be different from STAT_STOPPED_IMAGE.  */
   LIBERROR_BAD_WAIT_ID,
   LIBERROR_NO_MEMORY,
+  LIBERROR_RECURSIVE_IO,
   LIBERROR_LAST			/* Not a real error, the last error # + 1.  */
 }
 libgfortran_error_codes;

But that's already in r16-6515-ge32c3fb4311bca, so what do I
do with your newer patch?  Apply to r16-6514?

brgds, H-P