---
m4/fdatasync.m4 | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/m4/fdatasync.m4 b/m4/fdatasync.m4
index 9ee3294621..083537aa9c 100644
--- a/m4/fdatasync.m4
+++ b/m4/fdatasync.m4
@@ -1,4 +1,4 @@
-# fdatasync.m4 serial 5
+# fdatasync.m4 serial 6
dnl Copyright (C) 2008-2022 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -25,7 +25,8 @@ AC_DEFUN([gl_FUNC_FDATASYNC],
case "$host_os" in
solaris*)
dnl Solaris <= 2.6 has fdatasync() in libposix4.
- dnl Solaris 7..10 has it in librt.
+ dnl Solaris 7..9 has it in librt.
+ dnl Solaris 10 sometimes has it in librt <https://bugs.gnu.org/21059>.
gl_saved_libs=$LIBS
AC_SEARCH_LIBS([fdatasync], [rt posix4],
[test "$ac_cv_search_fdatasync" = "none required" ||
--
2.25.1
