From a02f5ce8d4804c4ba333104c010f97d54a60c032 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Sun, 23 Sep 2001 09:19:42 +0000
Subject: [PATCH] (jm_LIST_MOUNTED_FILESYSTEMS): Add a compile-test instead of
 the mere test for existence of mntent.h.  The latter would get a
 false-positive on AIX 3.4 systems.

---
 m4/ls-mntd-fs.m4 | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/m4/ls-mntd-fs.m4 b/m4/ls-mntd-fs.m4
index 541ea66a3..58a9db524 100644
--- a/m4/ls-mntd-fs.m4
+++ b/m4/ls-mntd-fs.m4
@@ -60,9 +60,23 @@ if test $ac_cv_func_getmntent = yes; then
     # 4.3BSD, SunOS, HP-UX, Dynix, Irix
     AC_MSG_CHECKING([for one-argument getmntent function])
     AC_CACHE_VAL(fu_cv_sys_mounted_getmntent1,
-		 [test $ac_cv_header_mntent_h = yes \
-		   && fu_cv_sys_mounted_getmntent1=yes \
-		   || fu_cv_sys_mounted_getmntent1=no])
+		 [AC_TRY_COMPILE([
+#include <mntent.h>
+#if !defined MOUNTED
+# if defined _PATH_MOUNTED	/* GNU libc  */
+#  define MOUNTED _PATH_MOUNTED
+# endif
+# if defined MNT_MNTTAB	/* HP-UX.  */
+#  define MOUNTED MNT_MNTTAB
+# endif
+# if defined MNTTABNAME	/* Dynix.  */
+#  define MOUNTED MNTTABNAME
+# endif
+#endif
+],
+                    [ struct mntent *mnt = 0; char *table = MOUNTED; ],
+		    fu_cv_sys_mounted_getmntent1=yes,
+		    fu_cv_sys_mounted_getmntent1=no)])
     AC_MSG_RESULT($fu_cv_sys_mounted_getmntent1)
     if test $fu_cv_sys_mounted_getmntent1 = yes; then
       ac_list_mounted_fs=found
-- 
2.11.0