[glibc/arm/morello/main] libio: adjust _IO_FILE / _IO_FILE_complete for 128 bit pointers

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cea2af3fd58088fb3d374f9817ff7c9f31e4cb29

commit cea2af3fd58088fb3d374f9817ff7c9f31e4cb29
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Mon Jul 26 16:31:38 2021 -0300

    libio: adjust _IO_FILE / _IO_FILE_complete for 128 bit pointers
    
    The size of the reserved space has to be adjusted because it underflows
    with 16 byte pointers.  With the new value there should be enough space
    for 2 more pointers in the struct on CHERI targets.

Diff:
---
 libio/bits/types/struct_FILE.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libio/bits/types/struct_FILE.h b/libio/bits/types/struct_FILE.h
index 1eb429888c..f73d051c0e 100644
--- a/libio/bits/types/struct_FILE.h
+++ b/libio/bits/types/struct_FILE.h
@@ -95,7 +95,9 @@ struct _IO_FILE_complete
   size_t __pad5;
   int _mode;
   /* Make sure we don't get into trouble again.  */
-  char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
+  char _unused2[sizeof (void *) == 4 * sizeof (int)
+		? 9 * sizeof (int)
+		: 15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
 };
 
 /* These macros are used by bits/stdio.h and internal headers.  */