commit cdb0800022110bc68a033944f09e501be5bd72d7
Author: Tulio Magno Quites Machado Filho <tuliom@redhat.com>
Date:   Thu Jan 30 15:51:01 2025 -0300

    libio: Replace __LP64__ with __WORDSIZE
    
    __LP64__ is a GCC extension and shouldn't be used in an installed
    header.
    
    Fixes: 596a61cf6b (libio: Start to return errors when flushing fwrite's buffer [BZ #29459], 2025-01-28)
    Reported-by: Florian Weimer <fweimer@redhat.com>
    Reviewed-by: Arjun Shankar <arjun@redhat.com>

diff --git a/libio/bits/types/struct_FILE.h b/libio/bits/types/struct_FILE.h
index 7292334a28ad3f79..59f316f8a03d9498 100644
--- a/libio/bits/types/struct_FILE.h
+++ b/libio/bits/types/struct_FILE.h
@@ -32,6 +32,7 @@
 #endif
 
 #include <bits/types.h>
+#include <bits/wordsize.h>
 
 struct _IO_FILE;
 struct _IO_marker;
@@ -102,11 +103,11 @@ struct _IO_FILE_complete
   void *_freeres_buf;
   size_t __pad5;
   int _mode;
-#ifdef __LP64__
+#if __WORDSIZE == 64
   int _unused3;
 #endif
   __uint64_t _total_written;
-#ifndef __LP64__
+#if __WORDSIZE == 32
   int _unused3;
 #endif
   /* Make sure we don't get into trouble again.  */