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-rw-r--r--m4/largefile.m44
1 files changed, 4 insertions, 0 deletions
diff --git a/m4/largefile.m4 b/m4/largefile.m4
index 40b16bc0e54..e381339c40c 100644
--- a/m4/largefile.m4
+++ b/m4/largefile.m4
@@ -1,4 +1,5 @@
# Enable large files on systems where this is not the default.
+# Enable support for files on Linux file systems with 64-bit inode numbers.
# Copyright 1992-1996, 1998-2020 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
@@ -73,6 +74,9 @@ rm -rf conftest*[]dnl
# one must use special compiler options to get large-file access to work.
# For more details about this brain damage please see:
# http://www.unix.org/version2/whatsnew/lfs20mar.html
+# Additionally, on Linux file systems with 64-bit inodes a file that happens
+# to have a 64-bit inode number cannot be accessed by 32-bit applications on
+# Linux x86/x86_64. This can occur with file systems such as XFS and NFS.
AC_DEFUN([AC_SYS_LARGEFILE],
[AC_ARG_ENABLE(largefile,
[ --disable-largefile omit support for large files])