Make better use of Autoconf.

* m4/environ.m4: Use AC_CACHE_CHECK where possible.
* m4/manywarnings.m4: Likewise.
* m4/manywarnings-c++.m4: Likewise.
* m4/socklen.m4: Likewise.
* m4/sockpfaf.m4: Likewise.
* m4/stdarg.m4: Likewise.
* m4/visibility.m4: Likewise.
* m4/fsusage.m4: Use AC_CACHE_CHECK where possible. Modernize
indentation.
* m4/ls-mntd-fs.m4: Likewise.

9 files changed, 571 insertions, 570 deletions

diff --git a/m4/environ.m4 b/m4/environ.m4
index 68b67eaca4..acee5364b7 100644
--- a/m4/environ.m4
+++ b/m4/environ.m4
@@ -1,4 +1,4 @@
-# environ.m4 serial 6
+# environ.m4 serial 7
 dnl Copyright (C) 2001-2004, 2006-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -29,16 +29,14 @@ AC_DEFUN_ONCE([gl_ENVIRON],
 AC_DEFUN([gt_CHECK_VAR_DECL],
 [
   define([gt_cv_var], [gt_cv_var_]$2[_declaration])
-  AC_MSG_CHECKING([if $2 is properly declared])
-  AC_CACHE_VAL([gt_cv_var], [
-    AC_COMPILE_IFELSE(
-      [AC_LANG_PROGRAM(
-         [[$1
-           extern struct { int foo; } $2;]],
-         [[$2.foo = 1;]])],
-      [gt_cv_var=no],
-      [gt_cv_var=yes])])
-  AC_MSG_RESULT([$gt_cv_var])
+  AC_CACHE_CHECK([if $2 is properly declared], [gt_cv_var],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[$1
+            extern struct { int foo; } $2;]],
+          [[$2.foo = 1;]])],
+       [gt_cv_var=no],
+       [gt_cv_var=yes])])
   if test $gt_cv_var = yes; then
     AC_DEFINE([HAVE_]m4_translit($2, [a-z], [A-Z])[_DECL], 1,
               [Define if you have the declaration of $2.])
diff --git a/m4/fsusage.m4 b/m4/fsusage.m4
index f9dfbcb7a0..aab4024a97 100644
--- a/m4/fsusage.m4
+++ b/m4/fsusage.m4
@@ -1,4 +1,4 @@
-# serial 32
+# serial 33
 # Obtaining file system usage information.
 
 # Copyright (C) 1997-1998, 2000-2001, 2003-2018 Free Software Foundation, Inc.
@@ -29,27 +29,30 @@ AC_DEFUN([gl_FSUSAGE],
 
 AC_DEFUN([gl_FILE_SYSTEM_USAGE],
 [
-dnl Enable large-file support. This has the effect of changing the size
-dnl of field f_blocks in 'struct statvfs' from 32 bit to 64 bit on
-dnl glibc/Hurd, HP-UX 11, Solaris (32-bit mode). It also changes the size
-dnl of field f_blocks in 'struct statfs' from 32 bit to 64 bit on
-dnl Mac OS X >= 10.5 (32-bit mode).
-AC_REQUIRE([AC_SYS_LARGEFILE])
+  dnl Enable large-file support. This has the effect of changing the size
+  dnl of field f_blocks in 'struct statvfs' from 32 bit to 64 bit on
+  dnl glibc/Hurd, HP-UX 11, Solaris (32-bit mode). It also changes the size
+  dnl of field f_blocks in 'struct statfs' from 32 bit to 64 bit on
+  dnl Mac OS X >= 10.5 (32-bit mode).
+  AC_REQUIRE([AC_SYS_LARGEFILE])
 
-AC_MSG_CHECKING([how to get file system space usage])
-ac_fsusage_space=no
+  AC_MSG_CHECKING([how to get file system space usage])
+  ac_fsusage_space=no
 
-# Perform only the link test since it seems there are no variants of the
-# statvfs function.  This check is more than just AC_CHECK_FUNCS([statvfs])
-# because that got a false positive on SCO OSR5.  Adding the declaration
-# of a 'struct statvfs' causes this test to fail (as it should) on such
-# systems.  That system is reported to work fine with STAT_STATFS4 which
-# is what it gets when this test fails.
-if test $ac_fsusage_space = no; then
-  # glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
-  # OpenBSD >= 4.4, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, BeOS.
-  AC_CACHE_CHECK([for statvfs function (SVR4)], [fu_cv_sys_stat_statvfs],
-                 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
+  # Perform only the link test since it seems there are no variants of the
+  # statvfs function.  This check is more than just AC_CHECK_FUNCS([statvfs])
+  # because that got a false positive on SCO OSR5.  Adding the declaration
+  # of a 'struct statvfs' causes this test to fail (as it should) on such
+  # systems.  That system is reported to work fine with STAT_STATFS4 which
+  # is what it gets when this test fails.
+  if test $ac_fsusage_space = no; then
+    # glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
+    # OpenBSD >= 4.4, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, BeOS.
+    AC_CACHE_CHECK([for statvfs function (SVR4)],
+      [fu_cv_sys_stat_statvfs],
+      [AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
+#include <sys/types.h>
 #ifdef __osf__
 "Do not use Tru64's statvfs implementation"
 #endif
@@ -68,45 +71,47 @@ struct statvfs fsd;
 int check_f_blocks_size[sizeof fsd.f_blocks * CHAR_BIT <= 32 ? -1 : 1];
 #endif
 ]],
-                                    [[statvfs (0, &fsd);]])],
-                                 [fu_cv_sys_stat_statvfs=yes],
-                                 [fu_cv_sys_stat_statvfs=no])])
-  if test $fu_cv_sys_stat_statvfs = yes; then
-    ac_fsusage_space=yes
-    # AIX >= 5.2 has statvfs64 that has a wider f_blocks field than statvfs.
-    # glibc, HP-UX, IRIX, Solaris have statvfs64 as well, but on these systems
-    # statvfs with large-file support is already equivalent to statvfs64.
-    AC_CACHE_CHECK([whether to use statvfs64],
-      [fu_cv_sys_stat_statvfs64],
-      [AC_LINK_IFELSE(
-         [AC_LANG_PROGRAM(
-            [[#include <sys/types.h>
-              #include <sys/statvfs.h>
-              struct statvfs64 fsd;
-              int check_f_blocks_larger_in_statvfs64
-                [sizeof (((struct statvfs64 *) 0)->f_blocks)
-                 > sizeof (((struct statvfs *) 0)->f_blocks)
-                 ? 1 : -1];
-            ]],
-            [[statvfs64 (0, &fsd);]])],
-         [fu_cv_sys_stat_statvfs64=yes],
-         [fu_cv_sys_stat_statvfs64=no])
+            [[statvfs (0, &fsd);]])],
+         [fu_cv_sys_stat_statvfs=yes],
+         [fu_cv_sys_stat_statvfs=no])
       ])
-    if test $fu_cv_sys_stat_statvfs64 = yes; then
-      AC_DEFINE([STAT_STATVFS64], [1],
-                [  Define if statvfs64 should be preferred over statvfs.])
-    else
-      AC_DEFINE([STAT_STATVFS], [1],
-                [  Define if there is a function named statvfs.  (SVR4)])
+    if test $fu_cv_sys_stat_statvfs = yes; then
+      ac_fsusage_space=yes
+      # AIX >= 5.2 has statvfs64 that has a wider f_blocks field than statvfs.
+      # glibc, HP-UX, IRIX, Solaris have statvfs64 as well, but on these systems
+      # statvfs with large-file support is already equivalent to statvfs64.
+      AC_CACHE_CHECK([whether to use statvfs64],
+        [fu_cv_sys_stat_statvfs64],
+        [AC_LINK_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <sys/types.h>
+                #include <sys/statvfs.h>
+                struct statvfs64 fsd;
+                int check_f_blocks_larger_in_statvfs64
+                  [sizeof (((struct statvfs64 *) 0)->f_blocks)
+                   > sizeof (((struct statvfs *) 0)->f_blocks)
+                   ? 1 : -1];
+              ]],
+              [[statvfs64 (0, &fsd);]])],
+           [fu_cv_sys_stat_statvfs64=yes],
+           [fu_cv_sys_stat_statvfs64=no])
+        ])
+      if test $fu_cv_sys_stat_statvfs64 = yes; then
+        AC_DEFINE([STAT_STATVFS64], [1],
+          [Define if statvfs64 should be preferred over statvfs.])
+      else
+        AC_DEFINE([STAT_STATVFS], [1],
+          [Define if there is a function named statvfs.  (SVR4)])
+      fi
     fi
   fi
-fi
 
-# Check for this unconditionally so we have a
-# good fallback on glibc/Linux > 2.6 < 2.6.36
-AC_MSG_CHECKING([for two-argument statfs with statfs.f_frsize member])
-AC_CACHE_VAL([fu_cv_sys_stat_statfs2_frsize],
-[AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  # Check for this unconditionally so we have a
+  # good fallback on glibc/Linux > 2.6 < 2.6.36
+  AC_CACHE_CHECK([for two-argument statfs with statfs.f_frsize member],
+    [fu_cv_sys_stat_statfs2_frsize],
+    [AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
@@ -119,26 +124,26 @@ AC_CACHE_VAL([fu_cv_sys_stat_statfs2_frsize],
   int
   main ()
   {
-  struct statfs fsd;
-  fsd.f_frsize = 0;
-  return statfs (".", &fsd) != 0;
+    struct statfs fsd;
+    fsd.f_frsize = 0;
+    return statfs (".", &fsd) != 0;
   }]])],
-  [fu_cv_sys_stat_statfs2_frsize=yes],
-  [fu_cv_sys_stat_statfs2_frsize=no],
-  [fu_cv_sys_stat_statfs2_frsize=no])])
-AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_frsize])
-if test $fu_cv_sys_stat_statfs2_frsize = yes; then
+       [fu_cv_sys_stat_statfs2_frsize=yes],
+       [fu_cv_sys_stat_statfs2_frsize=no],
+       [fu_cv_sys_stat_statfs2_frsize=no])
+    ])
+  if test $fu_cv_sys_stat_statfs2_frsize = yes; then
     ac_fsusage_space=yes
     AC_DEFINE([STAT_STATFS2_FRSIZE], [1],
-[  Define if statfs takes 2 args and struct statfs has a field named f_frsize.
-   (glibc/Linux > 2.6)])
-fi
+      [Define if statfs takes 2 args and struct statfs has a field named f_frsize.
+       (glibc/Linux > 2.6)])
+  fi
 
-if test $ac_fsusage_space = no; then
-  # DEC Alpha running OSF/1
-  AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
-  AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1],
-  [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  if test $ac_fsusage_space = no; then
+    # DEC Alpha running OSF/1
+    AC_CACHE_CHECK([for 3-argument statfs function (DEC OSF/1)],
+      [fu_cv_sys_stat_statfs3_osf1],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/mount.h>
@@ -149,28 +154,27 @@ if test $ac_fsusage_space = no; then
     fsd.f_fsize = 0;
     return statfs (".", &fsd, sizeof (struct statfs)) != 0;
   }]])],
-    [fu_cv_sys_stat_statfs3_osf1=yes],
-    [fu_cv_sys_stat_statfs3_osf1=no],
-    [fu_cv_sys_stat_statfs3_osf1=no])])
-  AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1])
-  if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
-    ac_fsusage_space=yes
-    AC_DEFINE([STAT_STATFS3_OSF1], [1],
-              [   Define if  statfs takes 3 args.  (DEC Alpha running OSF/1)])
+         [fu_cv_sys_stat_statfs3_osf1=yes],
+         [fu_cv_sys_stat_statfs3_osf1=no],
+         [fu_cv_sys_stat_statfs3_osf1=no])
+      ])
+    if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS3_OSF1], [1],
+        [Define if statfs takes 3 args.  (DEC Alpha running OSF/1)])
+    fi
   fi
-fi
 
-if test $ac_fsusage_space = no; then
-  # glibc/Linux, Mac OS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
-  # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
-  # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
-  # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
-  # <sys/vfs.h>.)
-  # (On Solaris, statfs has 4 arguments.)
-  AC_MSG_CHECKING([for two-argument statfs with statfs.f_bsize dnl
-member (AIX, 4.3BSD)])
-  AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize],
-  [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  if test $ac_fsusage_space = no; then
+    # glibc/Linux, Mac OS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
+    # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
+    # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
+    # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
+    # <sys/vfs.h>.)
+    # (On Solaris, statfs has 4 arguments.)
+    AC_CACHE_CHECK([for two-argument statfs with statfs.f_bsize member (AIX, 4.3BSD)],
+      [fu_cv_sys_stat_statfs2_bsize],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
@@ -183,57 +187,56 @@ member (AIX, 4.3BSD)])
   int
   main ()
   {
-  struct statfs fsd;
-  fsd.f_bsize = 0;
-  return statfs (".", &fsd) != 0;
+    struct statfs fsd;
+    fsd.f_bsize = 0;
+    return statfs (".", &fsd) != 0;
   }]])],
-    [fu_cv_sys_stat_statfs2_bsize=yes],
-    [fu_cv_sys_stat_statfs2_bsize=no],
-    [fu_cv_sys_stat_statfs2_bsize=no])])
-  AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize])
-  if test $fu_cv_sys_stat_statfs2_bsize = yes; then
-    ac_fsusage_space=yes
-    AC_DEFINE([STAT_STATFS2_BSIZE], [1],
-[  Define if statfs takes 2 args and struct statfs has a field named f_bsize.
-   (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
+         [fu_cv_sys_stat_statfs2_bsize=yes],
+         [fu_cv_sys_stat_statfs2_bsize=no],
+         [fu_cv_sys_stat_statfs2_bsize=no])
+      ])
+    if test $fu_cv_sys_stat_statfs2_bsize = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS2_BSIZE], [1],
+        [Define if statfs takes 2 args and struct statfs has a field named f_bsize.
+         (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
+    fi
   fi
-fi
 
-if test $ac_fsusage_space = no; then
-  # SVR3
-  # (Solaris already handled above.)
-  AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
-  AC_CACHE_VAL([fu_cv_sys_stat_statfs4],
-  [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  if test $ac_fsusage_space = no; then
+    # SVR3
+    # (Solaris already handled above.)
+    AC_CACHE_CHECK([for four-argument statfs (AIX-3.2.5, SVR3)],
+      [fu_cv_sys_stat_statfs4],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <sys/statfs.h>
   int
   main ()
   {
-  struct statfs fsd;
-  return statfs (".", &fsd, sizeof fsd, 0) != 0;
+    struct statfs fsd;
+    return statfs (".", &fsd, sizeof fsd, 0) != 0;
   }]])],
-    [fu_cv_sys_stat_statfs4=yes],
-    [fu_cv_sys_stat_statfs4=no],
-    [fu_cv_sys_stat_statfs4=no])])
-  AC_MSG_RESULT([$fu_cv_sys_stat_statfs4])
-  if test $fu_cv_sys_stat_statfs4 = yes; then
-    ac_fsusage_space=yes
-    AC_DEFINE([STAT_STATFS4], [1],
-      [  Define if statfs takes 4 args.  (SVR3, Dynix, old Irix, old AIX, Dolphin)])
+         [fu_cv_sys_stat_statfs4=yes],
+         [fu_cv_sys_stat_statfs4=no],
+         [fu_cv_sys_stat_statfs4=no])
+      ])
+    if test $fu_cv_sys_stat_statfs4 = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS4], [1],
+        [Define if statfs takes 4 args.  (SVR3, Dynix, old Irix, old AIX, Dolphin)])
+    fi
   fi
-fi
 
-if test $ac_fsusage_space = no; then
-  # 4.4BSD and older NetBSD
-  # (OSF/1 already handled above.)
-  # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
-  # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
-  # <sys/mount.h>.)
-  AC_MSG_CHECKING([for two-argument statfs with statfs.f_fsize dnl
-member (4.4BSD and NetBSD)])
-  AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize],
-  [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  if test $ac_fsusage_space = no; then
+    # 4.4BSD and older NetBSD
+    # (OSF/1 already handled above.)
+    # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
+    # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
+    # <sys/mount.h>.)
+    AC_CACHE_CHECK([for two-argument statfs with statfs.f_fsize member (4.4BSD and NetBSD)],
+      [fu_cv_sys_stat_statfs2_fsize],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -244,27 +247,27 @@ member (4.4BSD and NetBSD)])
   int
   main ()
   {
-  struct statfs fsd;
-  fsd.f_fsize = 0;
-  return statfs (".", &fsd) != 0;
+    struct statfs fsd;
+    fsd.f_fsize = 0;
+    return statfs (".", &fsd) != 0;
   }]])],
-    [fu_cv_sys_stat_statfs2_fsize=yes],
-    [fu_cv_sys_stat_statfs2_fsize=no],
-    [fu_cv_sys_stat_statfs2_fsize=no])])
-  AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize])
-  if test $fu_cv_sys_stat_statfs2_fsize = yes; then
-    ac_fsusage_space=yes
-    AC_DEFINE([STAT_STATFS2_FSIZE], [1],
-[  Define if statfs takes 2 args and struct statfs has a field named f_fsize.
-   (4.4BSD, NetBSD)])
+         [fu_cv_sys_stat_statfs2_fsize=yes],
+         [fu_cv_sys_stat_statfs2_fsize=no],
+         [fu_cv_sys_stat_statfs2_fsize=no])
+      ])
+    if test $fu_cv_sys_stat_statfs2_fsize = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS2_FSIZE], [1],
+        [Define if statfs takes 2 args and struct statfs has a field named f_fsize.
+         (4.4BSD, NetBSD)])
+    fi
   fi
-fi
 
-if test $ac_fsusage_space = no; then
-  # Ultrix
-  AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
-  AC_CACHE_VAL([fu_cv_sys_stat_fs_data],
-  [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+  if test $ac_fsusage_space = no; then
+    # Ultrix
+    AC_CACHE_CHECK([for two-argument statfs with struct fs_data (Ultrix)],
+      [fu_cv_sys_stat_fs_data],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -278,24 +281,24 @@ if test $ac_fsusage_space = no; then
   int
   main ()
   {
-  struct fs_data fsd;
-  /* Ultrix's statfs returns 1 for success,
-     0 for not mounted, -1 for failure.  */
-  return statfs (".", &fsd) != 1;
+    struct fs_data fsd;
+    /* Ultrix's statfs returns 1 for success,
+       0 for not mounted, -1 for failure.  */
+    return statfs (".", &fsd) != 1;
   }]])],
-    [fu_cv_sys_stat_fs_data=yes],
-    [fu_cv_sys_stat_fs_data=no],
-    [fu_cv_sys_stat_fs_data=no])])
-  AC_MSG_RESULT([$fu_cv_sys_stat_fs_data])
-  if test $fu_cv_sys_stat_fs_data = yes; then
-    ac_fsusage_space=yes
-    AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
-[  Define if statfs takes 2 args and the second argument has
-   type struct fs_data.  (Ultrix)])
+         [fu_cv_sys_stat_fs_data=yes],
+         [fu_cv_sys_stat_fs_data=no],
+         [fu_cv_sys_stat_fs_data=no])
+      ])
+    if test $fu_cv_sys_stat_fs_data = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
+        [Define if statfs takes 2 args and the second argument has
+         type struct fs_data.  (Ultrix)])
+    fi
   fi
-fi
 
-AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
+  AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
 
 ])
 
@@ -305,18 +308,22 @@ AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
 # enable the work-around code in fsusage.c.
 AC_DEFUN([gl_STATFS_TRUNCATES],
 [
-  AC_MSG_CHECKING([for statfs that truncates block counts])
-  AC_CACHE_VAL([fu_cv_sys_truncating_statfs],
-  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+  AC_CACHE_CHECK([for statfs that truncates block counts],
+    [fu_cv_sys_truncating_statfs],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([[
 #if !defined(sun) && !defined(__sun)
 choke -- this is a workaround for a Sun-specific problem
 #endif
 #include <sys/types.h>
-#include <sys/vfs.h>]],
-      [[struct statfs t; long c = *(t.f_spare);
-        if (c) return 0;]])],
-    [fu_cv_sys_truncating_statfs=yes],
-    [fu_cv_sys_truncating_statfs=no])])
+#include <sys/vfs.h>
+         ]],
+         [[struct statfs t; long c = *(t.f_spare);
+           if (c) return 0;
+         ]])],
+       [fu_cv_sys_truncating_statfs=yes],
+       [fu_cv_sys_truncating_statfs=no])
+    ])
   if test $fu_cv_sys_truncating_statfs = yes; then
     AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
       [Define if the block counts reported by statfs may be truncated to 2GB
@@ -324,7 +331,6 @@ choke -- this is a workaround for a Sun-specific problem
        (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
        SunOS 4.1.1 seems not to be affected.)])
   fi
-  AC_MSG_RESULT([$fu_cv_sys_truncating_statfs])
 ])
 
 
diff --git a/m4/ls-mntd-fs.m4 b/m4/ls-mntd-fs.m4
index 6e8d30889a..6a03fe3a4a 100644
--- a/m4/ls-mntd-fs.m4
+++ b/m4/ls-mntd-fs.m4
@@ -1,4 +1,4 @@
-# serial 33
+# serial 34
 # How to list mounted file systems.
 
 # Copyright (C) 1998-2004, 2006, 2009-2018 Free Software Foundation, Inc.
@@ -17,31 +17,33 @@ dnl
 # through Autoconf 2.59.  We can remove this once we assume Autoconf 2.60
 # or later.
 AC_DEFUN([AC_FUNC_GETMNTENT],
-[# getmntent is in the standard C library on UNICOS, in -lsun on Irix 4,
-# -lseq on Dynix/PTX, -lgen on Unixware.
-AC_SEARCH_LIBS([getmntent], [sun seq gen])
-AC_CHECK_FUNCS([getmntent])
+[
+  # getmntent is in the standard C library on UNICOS, in -lsun on Irix 4,
+  # -lseq on Dynix/PTX, -lgen on Unixware.
+  AC_SEARCH_LIBS([getmntent], [sun seq gen])
+  AC_CHECK_FUNCS([getmntent])
 ])
 
 # gl_LIST_MOUNTED_FILE_SYSTEMS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
 AC_DEFUN([gl_LIST_MOUNTED_FILE_SYSTEMS],
-  [
-AC_REQUIRE([AC_CANONICAL_HOST])
-AC_CHECK_FUNCS([listmntent getmntinfo])
-AC_CHECK_HEADERS_ONCE([sys/param.h sys/statvfs.h])
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([listmntent getmntinfo])
+  AC_CHECK_HEADERS_ONCE([sys/param.h sys/statvfs.h])
 
-# We must include grp.h before ucred.h on OSF V4.0, since ucred.h uses
-# NGROUPS (as the array dimension for a struct member) without a definition.
-AC_CHECK_HEADERS([sys/ucred.h], [], [], [#include <grp.h>])
+  # We must include grp.h before ucred.h on OSF V4.0, since ucred.h uses
+  # NGROUPS (as the array dimension for a struct member) without a definition.
+  AC_CHECK_HEADERS([sys/ucred.h], [], [], [#include <grp.h>])
 
-AC_CHECK_HEADERS([sys/mount.h], [], [],
-  [AC_INCLUDES_DEFAULT
-   [#if HAVE_SYS_PARAM_H
-     #include <sys/param.h>
-    #endif]])
+  AC_CHECK_HEADERS([sys/mount.h], [], [],
+    [AC_INCLUDES_DEFAULT
+     [#if HAVE_SYS_PARAM_H
+       #include <sys/param.h>
+      #endif
+    ]])
 
-AC_CHECK_HEADERS([mntent.h sys/fs_types.h])
-    getfsstat_includes="\
+  AC_CHECK_HEADERS([mntent.h sys/fs_types.h])
+  getfsstat_includes="\
 $ac_includes_default
 #if HAVE_SYS_PARAM_H
 # include <sys/param.h> /* needed by powerpc-apple-darwin1.3.7 */
@@ -57,74 +59,72 @@ $ac_includes_default
 # include <sys/fs_types.h> /* needed by powerpc-apple-darwin1.3.7 */
 #endif
 "
-AC_CHECK_MEMBERS([struct fsstat.f_fstypename],,,[$getfsstat_includes])
+  AC_CHECK_MEMBERS([struct fsstat.f_fstypename],,,[$getfsstat_includes])
 
-# Determine how to get the list of mounted file systems.
-ac_list_mounted_fs=
+  # Determine how to get the list of mounted file systems.
+  ac_list_mounted_fs=
 
-# If the getmntent function is available but not in the standard library,
-# make sure LIBS contains the appropriate -l option.
-AC_FUNC_GETMNTENT
+  # If the getmntent function is available but not in the standard library,
+  # make sure LIBS contains the appropriate -l option.
+  AC_FUNC_GETMNTENT
 
-# This test must precede the ones for getmntent because Unicos-9 is
-# reported to have the getmntent function, but its support is incompatible
-# with other getmntent implementations.
+  # This test must precede the ones for getmntent because Unicos-9 is
+  # reported to have the getmntent function, but its support is incompatible
+  # with other getmntent implementations.
 
-# NOTE: Normally, I wouldn't use a check for system type as I've done for
-# 'CRAY' below since that goes against the whole autoconf philosophy.  But
-# I think there is too great a chance that some non-Cray system has a
-# function named listmntent to risk the false positive.
+  # NOTE: Normally, I wouldn't use a check for system type as I've done for
+  # 'CRAY' below since that goes against the whole autoconf philosophy.  But
+  # I think there is too great a chance that some non-Cray system has a
+  # function named listmntent to risk the false positive.
 
-if test -z "$ac_list_mounted_fs"; then
-  # (obsolete) Cray UNICOS 9
-  AC_MSG_CHECKING([for listmntent of Cray/Unicos-9])
-  AC_CACHE_VAL([fu_cv_sys_mounted_cray_listmntent],
-    [fu_cv_sys_mounted_cray_listmntent=no
-      AC_EGREP_CPP([yes],
-        [#ifdef _CRAY
+  if test -z "$ac_list_mounted_fs"; then
+    # (obsolete) Cray UNICOS 9
+    AC_CACHE_CHECK([for listmntent of Cray/Unicos-9],
+      [fu_cv_sys_mounted_cray_listmntent],
+      [fu_cv_sys_mounted_cray_listmntent=no
+        AC_EGREP_CPP([yes],
+          [#ifdef _CRAY
 yes
 #endif
-        ], [test $ac_cv_func_listmntent = yes \
-            && fu_cv_sys_mounted_cray_listmntent=yes]
-      )
-    ]
-  )
-  AC_MSG_RESULT([$fu_cv_sys_mounted_cray_listmntent])
-  if test $fu_cv_sys_mounted_cray_listmntent = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_LISTMNTENT], [1],
-      [Define if there is a function named listmntent that can be used to
-       list all mounted file systems.  (UNICOS)])
+          ], [test $ac_cv_func_listmntent = yes \
+              && fu_cv_sys_mounted_cray_listmntent=yes]
+        )
+      ])
+    if test $fu_cv_sys_mounted_cray_listmntent = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_LISTMNTENT], [1],
+        [Define if there is a function named listmntent that can be used to
+         list all mounted file systems.  (UNICOS)])
+    fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # AIX.
-  AC_MSG_CHECKING([for mntctl function and struct vmount])
-  AC_CACHE_VAL([fu_cv_sys_mounted_vmount],
-  [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <fshelp.h>]])],
-    [fu_cv_sys_mounted_vmount=yes],
-    [fu_cv_sys_mounted_vmount=no])])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_vmount])
-  if test $fu_cv_sys_mounted_vmount = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_VMOUNT], [1],
+  if test -z "$ac_list_mounted_fs"; then
+    # AIX.
+    AC_CACHE_CHECK([for mntctl function and struct vmount],
+      [fu_cv_sys_mounted_vmount],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <fshelp.h>]])],
+         [fu_cv_sys_mounted_vmount=yes],
+         [fu_cv_sys_mounted_vmount=no])])
+    if test $fu_cv_sys_mounted_vmount = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_VMOUNT], [1],
         [Define if there is a function named mntctl that can be used to read
          the list of mounted file systems, and there is a system header file
          that declares 'struct vmount'.  (AIX)])
+    fi
   fi
-fi
 
-if test $ac_cv_func_getmntent = yes; then
+  if test $ac_cv_func_getmntent = yes; then
 
-  # This system has the getmntent function.
-  # Determine whether it's the one-argument variant or the two-argument one.
+    # This system has the getmntent function.
+    # Determine whether it's the one-argument variant or the two-argument one.
 
-  if test -z "$ac_list_mounted_fs"; then
-    # glibc, HP-UX, IRIX, Cygwin, Android, also (obsolete) 4.3BSD, SunOS, Dynix.
-    AC_MSG_CHECKING([for one-argument getmntent function])
-    AC_CACHE_VAL([fu_cv_sys_mounted_getmntent1],
-                 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+    if test -z "$ac_list_mounted_fs"; then
+      # glibc, HP-UX, IRIX, Cygwin, Android, also (obsolete) 4.3BSD, SunOS, Dynix.
+      AC_CACHE_CHECK([for one-argument getmntent function],
+        [fu_cv_sys_mounted_getmntent1],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
 /* SunOS 4.1.x /usr/include/mntent.h needs this for FILE */
 #include <stdio.h>
 
@@ -141,105 +141,108 @@ if test $ac_cv_func_getmntent = yes; then
 # endif
 #endif
 ]],
-                      [[ struct mntent *mnt = 0; char *table = MOUNTED;
-                         if (sizeof mnt && sizeof table) return 0;]])],
-                    [fu_cv_sys_mounted_getmntent1=yes],
-                    [fu_cv_sys_mounted_getmntent1=no])])
-    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent1])
-    if test $fu_cv_sys_mounted_getmntent1 = yes; then
-      ac_list_mounted_fs=found
-      AC_DEFINE([MOUNTED_GETMNTENT1], [1],
-        [Define if there is a function named getmntent for reading the list
-         of mounted file systems, and that function takes a single argument.
-         (4.3BSD, SunOS, HP-UX, Dynix, Irix)])
-      AC_CHECK_FUNCS([hasmntopt])
+              [[struct mntent *mnt = 0; char *table = MOUNTED;
+                if (sizeof mnt && sizeof table) return 0;
+              ]])],
+           [fu_cv_sys_mounted_getmntent1=yes],
+           [fu_cv_sys_mounted_getmntent1=no])
+        ])
+      if test $fu_cv_sys_mounted_getmntent1 = yes; then
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTENT1], [1],
+          [Define if there is a function named getmntent for reading the list
+           of mounted file systems, and that function takes a single argument.
+           (4.3BSD, SunOS, HP-UX, Dynix, Irix)])
+        AC_CHECK_FUNCS([hasmntopt])
+      fi
     fi
-  fi
 
-  if test -z "$ac_list_mounted_fs"; then
-    # Solaris, also (obsolete) SVR4.
-    AC_MSG_CHECKING([for two-argument getmntent function])
-    AC_CACHE_VAL([fu_cv_sys_mounted_getmntent2],
-    [AC_EGREP_HEADER([getmntent], [sys/mnttab.h],
-      fu_cv_sys_mounted_getmntent2=yes,
-      fu_cv_sys_mounted_getmntent2=no)])
-    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent2])
-    if test $fu_cv_sys_mounted_getmntent2 = yes; then
-      ac_list_mounted_fs=found
-      AC_DEFINE([MOUNTED_GETMNTENT2], [1],
-        [Define if there is a function named getmntent for reading the list of
-         mounted file systems, and that function takes two arguments.  (SVR4)])
-      AC_CHECK_FUNCS([hasmntopt])
+    if test -z "$ac_list_mounted_fs"; then
+      # Solaris, also (obsolete) SVR4.
+      AC_CACHE_CHECK([for two-argument getmntent function],
+        [fu_cv_sys_mounted_getmntent2],
+        [AC_EGREP_HEADER([getmntent], [sys/mnttab.h],
+           [fu_cv_sys_mounted_getmntent2=yes],
+           [fu_cv_sys_mounted_getmntent2=no])
+        ])
+      if test $fu_cv_sys_mounted_getmntent2 = yes; then
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTENT2], [1],
+          [Define if there is a function named getmntent for reading the list of
+           mounted file systems, and that function takes two arguments.  (SVR4)])
+        AC_CHECK_FUNCS([hasmntopt])
+      fi
     fi
-  fi
 
-fi
+  fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # OSF/1, also (obsolete) Apple Darwin 1.3.
-  # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
+  if test -z "$ac_list_mounted_fs"; then
+    # OSF/1, also (obsolete) Apple Darwin 1.3.
+    # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
 
-  AC_MSG_CHECKING([for getfsstat function])
-  AC_CACHE_VAL([fu_cv_sys_mounted_getfsstat],
-  [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+    AC_CACHE_CHECK([for getfsstat function],
+      [fu_cv_sys_mounted_getfsstat],
+      [AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
 # define FS_TYPE(Ent) ((Ent).f_fstypename)
 #else
 # define FS_TYPE(Ent) mnt_names[(Ent).f_type]
 #endif
-$getfsstat_includes]]
-,
-      [[struct statfs *stats;
-        int numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
-        char *t = FS_TYPE (*stats); ]])],
-    [fu_cv_sys_mounted_getfsstat=yes],
-    [fu_cv_sys_mounted_getfsstat=no])])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_getfsstat])
-  if test $fu_cv_sys_mounted_getfsstat = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_GETFSSTAT], [1],
-              [Define if there is a function named getfsstat for reading the
-               list of mounted file systems.  (DEC Alpha running OSF/1)])
+$getfsstat_includes
+            ]],
+            [[struct statfs *stats;
+              int numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
+              char *t = FS_TYPE (*stats);
+            ]])],
+         [fu_cv_sys_mounted_getfsstat=yes],
+         [fu_cv_sys_mounted_getfsstat=no])
+      ])
+    if test $fu_cv_sys_mounted_getfsstat = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_GETFSSTAT], [1],
+        [Define if there is a function named getfsstat for reading the
+         list of mounted file systems.  (DEC Alpha running OSF/1)])
+    fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # (obsolete) SVR3
-  AC_MSG_CHECKING([for FIXME existence of three headers])
-  AC_CACHE_VAL([fu_cv_sys_mounted_fread_fstyp],
-    [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
+  if test -z "$ac_list_mounted_fs"; then
+    # (obsolete) SVR3
+    AC_CACHE_CHECK([for FIXME existence of three headers],
+      [fu_cv_sys_mounted_fread_fstyp],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
 #include <sys/statfs.h>
 #include <sys/fstyp.h>
-#include <mnttab.h>]])],
-                       [fu_cv_sys_mounted_fread_fstyp=yes],
-                       [fu_cv_sys_mounted_fread_fstyp=no])])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_fread_fstyp])
-  if test $fu_cv_sys_mounted_fread_fstyp = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_FREAD_FSTYP], [1],
-      [Define if (like SVR2) there is no specific function for reading the
-       list of mounted file systems, and your system has these header files:
-       <sys/fstyp.h> and <sys/statfs.h>.  (SVR3)])
+#include <mnttab.h>
+]])],
+         [fu_cv_sys_mounted_fread_fstyp=yes],
+         [fu_cv_sys_mounted_fread_fstyp=no])
+      ])
+    if test $fu_cv_sys_mounted_fread_fstyp = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_FREAD_FSTYP], [1],
+        [Define if (like SVR2) there is no specific function for reading the
+         list of mounted file systems, and your system has these header files:
+         <sys/fstyp.h> and <sys/statfs.h>.  (SVR3)])
+    fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # Mac OS X, FreeBSD, NetBSD, OpenBSD, also (obsolete) 4.4BSD.
-  # OSF/1 also has getmntinfo but is already handled above.
-  AC_MSG_CHECKING([for getmntinfo function])
-  AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo],
-    [
-      test "$ac_cv_func_getmntinfo" = yes \
+  if test -z "$ac_list_mounted_fs"; then
+    # Mac OS X, FreeBSD, NetBSD, OpenBSD, also (obsolete) 4.4BSD.
+    # OSF/1 also has getmntinfo but is already handled above.
+    AC_CACHE_CHECK([for getmntinfo function],
+      [fu_cv_sys_mounted_getmntinfo],
+      [
+        test "$ac_cv_func_getmntinfo" = yes \
           && fu_cv_sys_mounted_getmntinfo=yes \
           || fu_cv_sys_mounted_getmntinfo=no
-    ])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo])
-  if test $fu_cv_sys_mounted_getmntinfo = yes; then
-    AC_MSG_CHECKING([whether getmntinfo returns statvfs structures])
-    AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo2],
-      [
-        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+      ])
+    if test $fu_cv_sys_mounted_getmntinfo = yes; then
+      AC_CACHE_CHECK([whether getmntinfo returns statvfs structures],
+        [fu_cv_sys_mounted_getmntinfo2],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
 #if HAVE_SYS_PARAM_H
 # include <sys/param.h>
 #endif
@@ -255,108 +258,108 @@ extern
 "C"
 #endif
 int getmntinfo (struct statfs **, int);
-            ]], [])],
-          [fu_cv_sys_mounted_getmntinfo2=no],
-          [fu_cv_sys_mounted_getmntinfo2=yes])
-      ])
-    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo2])
-    if test $fu_cv_sys_mounted_getmntinfo2 = no; then
-      # Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD.
-      ac_list_mounted_fs=found
-      AC_DEFINE([MOUNTED_GETMNTINFO], [1],
-                [Define if there is a function named getmntinfo for reading the
-                 list of mounted file systems and it returns an array of
-                 'struct statfs'.  (4.4BSD, Darwin)])
-    else
-      # NetBSD.
-      ac_list_mounted_fs=found
-      AC_DEFINE([MOUNTED_GETMNTINFO2], [1],
-                [Define if there is a function named getmntinfo for reading the
-                 list of mounted file systems and it returns an array of
-                 'struct statvfs'.  (NetBSD 3.0)])
+              ]], [])],
+           [fu_cv_sys_mounted_getmntinfo2=no],
+           [fu_cv_sys_mounted_getmntinfo2=yes])
+        ])
+      if test $fu_cv_sys_mounted_getmntinfo2 = no; then
+        # Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD.
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTINFO], [1],
+          [Define if there is a function named getmntinfo for reading the
+           list of mounted file systems and it returns an array of
+           'struct statfs'.  (4.4BSD, Darwin)])
+      else
+        # NetBSD.
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTINFO2], [1],
+          [Define if there is a function named getmntinfo for reading the
+           list of mounted file systems and it returns an array of
+           'struct statvfs'.  (NetBSD 3.0)])
+      fi
     fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # (obsolete) Ultrix.
-  AC_MSG_CHECKING([for getmnt function])
-  AC_CACHE_VAL([fu_cv_sys_mounted_getmnt],
-    [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
+  if test -z "$ac_list_mounted_fs"; then
+    # (obsolete) Ultrix.
+    AC_CACHE_CHECK([for getmnt function],
+      [fu_cv_sys_mounted_getmnt],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
 #include <sys/fs_types.h>
 #include <sys/mount.h>]])],
-                       [fu_cv_sys_mounted_getmnt=yes],
-                       [fu_cv_sys_mounted_getmnt=no])])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_getmnt])
-  if test $fu_cv_sys_mounted_getmnt = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_GETMNT], [1],
-      [Define if there is a function named getmnt for reading the list of
-       mounted file systems.  (Ultrix)])
-  fi
-fi
-
-if test -z "$ac_list_mounted_fs"; then
-  # Haiku, also (obsolete) BeOS.
-  AC_CHECK_FUNCS([next_dev fs_stat_dev])
-  AC_CHECK_HEADERS([fs_info.h])
-  AC_MSG_CHECKING([for BEOS mounted file system support functions])
-  if test $ac_cv_header_fs_info_h = yes \
-      && test $ac_cv_func_next_dev = yes \
-        && test $ac_cv_func_fs_stat_dev = yes; then
-    fu_result=yes
-  else
-    fu_result=no
-  fi
-  AC_MSG_RESULT([$fu_result])
-  if test $fu_result = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_FS_STAT_DEV], [1],
-      [Define if there are functions named next_dev and fs_stat_dev for
-       reading the list of mounted file systems.  (BeOS)])
+         [fu_cv_sys_mounted_getmnt=yes],
+         [fu_cv_sys_mounted_getmnt=no])
+      ])
+    if test $fu_cv_sys_mounted_getmnt = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_GETMNT], [1],
+        [Define if there is a function named getmnt for reading the list of
+         mounted file systems.  (Ultrix)])
+    fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # (obsolete) SVR2.
-  AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
-  AC_CACHE_VAL([fu_cv_sys_mounted_fread],
-    [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <mnttab.h>]])],
-                       [fu_cv_sys_mounted_fread=yes],
-                       [fu_cv_sys_mounted_fread=no])])
-  AC_MSG_RESULT([$fu_cv_sys_mounted_fread])
-  if test $fu_cv_sys_mounted_fread = yes; then
-    ac_list_mounted_fs=found
-    AC_DEFINE([MOUNTED_FREAD], [1],
-              [Define if there is no specific function for reading the list of
-               mounted file systems.  fread will be used to read /etc/mnttab.
-               (SVR2) ])
+  if test -z "$ac_list_mounted_fs"; then
+    # Haiku, also (obsolete) BeOS.
+    AC_CHECK_FUNCS([next_dev fs_stat_dev])
+    AC_CHECK_HEADERS([fs_info.h])
+    AC_CACHE_CHECK([for BEOS mounted file system support functions],
+      [fu_cv_sys_mounted_fs_stat_dev],
+      [if test $ac_cv_header_fs_info_h = yes \
+          && test $ac_cv_func_next_dev = yes \
+          && test $ac_cv_func_fs_stat_dev = yes; then
+         fu_cv_sys_mounted_fs_stat_dev=yes
+       else
+         fu_cv_sys_mounted_fs_stat_dev=no
+       fi
+      ])
+    if test $fu_cv_sys_mounted_fs_stat_dev = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_FS_STAT_DEV], [1],
+        [Define if there are functions named next_dev and fs_stat_dev for
+         reading the list of mounted file systems.  (BeOS)])
+    fi
   fi
-fi
 
-if test -z "$ac_list_mounted_fs"; then
-  # Interix / BSD alike statvfs
-  # the code is really interix specific, so make sure, we're on it.
-  case "$host" in
-  *-interix*)
-    AC_CHECK_FUNCS([statvfs])
-    if test $ac_cv_func_statvfs = yes; then
+  if test -z "$ac_list_mounted_fs"; then
+    # (obsolete) SVR2.
+    AC_CACHE_CHECK([whether it is possible to resort to fread on /etc/mnttab],
+      [fu_cv_sys_mounted_fread],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <mnttab.h>]])],
+         [fu_cv_sys_mounted_fread=yes],
+         [fu_cv_sys_mounted_fread=no])
+      ])
+    if test $fu_cv_sys_mounted_fread = yes; then
       ac_list_mounted_fs=found
-      AC_DEFINE([MOUNTED_INTERIX_STATVFS], [1],
-                [Define if we are on interix, and ought to use statvfs plus
-                 some special knowledge on where mounted file systems can be
-                 found. (Interix)])
+      AC_DEFINE([MOUNTED_FREAD], [1],
+        [Define if there is no specific function for reading the list of
+         mounted file systems.  fread will be used to read /etc/mnttab.
+         (SVR2) ])
     fi
-    ;;
-  esac
-fi
+  fi
 
-if test -z "$ac_list_mounted_fs"; then
-  AC_MSG_ERROR([could not determine how to read list of mounted file systems])
-  # FIXME -- no need to abort building the whole package
-  # Can't build mountlist.c or anything that needs its functions
-fi
+  if test -z "$ac_list_mounted_fs"; then
+    # Interix / BSD alike statvfs
+    # the code is really interix specific, so make sure, we're on it.
+    case "$host" in
+      *-interix*)
+        AC_CHECK_FUNCS([statvfs])
+        if test $ac_cv_func_statvfs = yes; then
+          ac_list_mounted_fs=found
+          AC_DEFINE([MOUNTED_INTERIX_STATVFS], [1],
+            [Define if we are on interix, and ought to use statvfs plus
+             some special knowledge on where mounted file systems can be
+             found. (Interix)])
+        fi
+        ;;
+    esac
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    AC_MSG_ERROR([could not determine how to read list of mounted file systems])
+    # FIXME -- no need to abort building the whole package
+    # Can't build mountlist.c or anything that needs its functions
+  fi
 
-AS_IF([test $ac_list_mounted_fs = found], [$1], [$2])
+  AS_IF([test $ac_list_mounted_fs = found], [$1], [$2])
 
-  ])
+])
diff --git a/m4/manywarnings-c++.m4 b/m4/manywarnings-c++.m4
index 28d9aa0d48..dea8e1970b 100644
--- a/m4/manywarnings-c++.m4
+++ b/m4/manywarnings-c++.m4
@@ -1,4 +1,4 @@
-# manywarnings-c++.m4 serial 2
+# manywarnings-c++.m4 serial 3
 dnl Copyright (C) 2008-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -17,54 +17,53 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC_CXX_IMPL],
 
     dnl Check if -W -Werror -Wno-missing-field-initializers is supported
     dnl with the current $CXX $CXXFLAGS $CPPFLAGS.
-    AC_MSG_CHECKING([whether -Wno-missing-field-initializers is supported])
-    AC_CACHE_VAL([gl_cv_cxx_nomfi_supported], [
-      gl_save_CXXFLAGS="$CXXFLAGS"
-      CXXFLAGS="$CXXFLAGS -W -Werror -Wno-missing-field-initializers"
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[]], [[]])],
-        [gl_cv_cxx_nomfi_supported=yes],
-        [gl_cv_cxx_nomfi_supported=no])
-      CXXFLAGS="$gl_save_CXXFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cxx_nomfi_supported])
+    AC_CACHE_CHECK([whether -Wno-missing-field-initializers is supported],
+      [gl_cv_cxx_nomfi_supported],
+      [gl_save_CXXFLAGS="$CXXFLAGS"
+       CXXFLAGS="$CXXFLAGS -W -Werror -Wno-missing-field-initializers"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cxx_nomfi_supported=yes],
+         [gl_cv_cxx_nomfi_supported=no])
+       CXXFLAGS="$gl_save_CXXFLAGS"
+      ])
 
     if test "$gl_cv_cxx_nomfi_supported" = yes; then
       dnl Now check whether -Wno-missing-field-initializers is needed
       dnl for the { 0, } construct.
-      AC_MSG_CHECKING([whether -Wno-missing-field-initializers is needed])
-      AC_CACHE_VAL([gl_cv_cxx_nomfi_needed], [
-        gl_save_CXXFLAGS="$CXXFLAGS"
-        CXXFLAGS="$CXXFLAGS -W -Werror"
-        AC_COMPILE_IFELSE(
-          [AC_LANG_PROGRAM(
-             [[int f (void)
-               {
-                 typedef struct { int a; int b; } s_t;
-                 s_t s1 = { 0, };
-                 return s1.b;
-               }
-             ]],
-             [[]])],
-          [gl_cv_cxx_nomfi_needed=no],
-          [gl_cv_cxx_nomfi_needed=yes])
-        CXXFLAGS="$gl_save_CXXFLAGS"
-      ])
-      AC_MSG_RESULT([$gl_cv_cxx_nomfi_needed])
+      AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
+        [gl_cv_cxx_nomfi_needed],
+        [gl_save_CXXFLAGS="$CXXFLAGS"
+         CXXFLAGS="$CXXFLAGS -W -Werror"
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[int f (void)
+                {
+                  typedef struct { int a; int b; } s_t;
+                  s_t s1 = { 0, };
+                  return s1.b;
+                }
+              ]],
+              [[]])],
+           [gl_cv_cxx_nomfi_needed=no],
+           [gl_cv_cxx_nomfi_needed=yes])
+         CXXFLAGS="$gl_save_CXXFLAGS"
+        ])
     fi
 
     dnl Next, check if -Werror -Wuninitialized is useful with the
     dnl user's choice of $CXXFLAGS; some versions of gcc warn that it
     dnl has no effect if -O is not also used
-    AC_MSG_CHECKING([whether -Wuninitialized is supported])
-    AC_CACHE_VAL([gl_cv_cxx_uninitialized_supported], [
-      gl_save_CXXFLAGS="$CXXFLAGS"
-      CXXFLAGS="$CXXFLAGS -Werror -Wuninitialized"
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[]], [[]])],
-        [gl_cv_cxx_uninitialized_supported=yes],
-        [gl_cv_cxx_uninitialized_supported=no])
-      CXXFLAGS="$gl_save_CXXFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cxx_uninitialized_supported])
+    AC_CACHE_CHECK([whether -Wuninitialized is supported],
+      [gl_cv_cxx_uninitialized_supported],
+      [gl_save_CXXFLAGS="$CXXFLAGS"
+       CXXFLAGS="$CXXFLAGS -Werror -Wuninitialized"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cxx_uninitialized_supported=yes],
+         [gl_cv_cxx_uninitialized_supported=no])
+       CXXFLAGS="$gl_save_CXXFLAGS"
+      ])
 
   fi
 
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index 516c587476..d831ed2eb6 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,4 +1,4 @@
-# manywarnings.m4 serial 16
+# manywarnings.m4 serial 17
 dnl Copyright (C) 2008-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -51,54 +51,53 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
 
     dnl Check if -W -Werror -Wno-missing-field-initializers is supported
     dnl with the current $CC $CFLAGS $CPPFLAGS.
-    AC_MSG_CHECKING([whether -Wno-missing-field-initializers is supported])
-    AC_CACHE_VAL([gl_cv_cc_nomfi_supported], [
-      gl_save_CFLAGS="$CFLAGS"
-      CFLAGS="$CFLAGS -W -Werror -Wno-missing-field-initializers"
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[]], [[]])],
-        [gl_cv_cc_nomfi_supported=yes],
-        [gl_cv_cc_nomfi_supported=no])
-      CFLAGS="$gl_save_CFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cc_nomfi_supported])
+    AC_CACHE_CHECK([whether -Wno-missing-field-initializers is supported],
+      [gl_cv_cc_nomfi_supported],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -W -Werror -Wno-missing-field-initializers"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_nomfi_supported=yes],
+         [gl_cv_cc_nomfi_supported=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
 
     if test "$gl_cv_cc_nomfi_supported" = yes; then
       dnl Now check whether -Wno-missing-field-initializers is needed
       dnl for the { 0, } construct.
-      AC_MSG_CHECKING([whether -Wno-missing-field-initializers is needed])
-      AC_CACHE_VAL([gl_cv_cc_nomfi_needed], [
-        gl_save_CFLAGS="$CFLAGS"
-        CFLAGS="$CFLAGS -W -Werror"
-        AC_COMPILE_IFELSE(
-          [AC_LANG_PROGRAM(
-             [[int f (void)
-               {
-                 typedef struct { int a; int b; } s_t;
-                 s_t s1 = { 0, };
-                 return s1.b;
-               }
-             ]],
-             [[]])],
-          [gl_cv_cc_nomfi_needed=no],
-          [gl_cv_cc_nomfi_needed=yes])
-        CFLAGS="$gl_save_CFLAGS"
-      ])
-      AC_MSG_RESULT([$gl_cv_cc_nomfi_needed])
+      AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
+        [gl_cv_cc_nomfi_needed],
+        [gl_save_CFLAGS="$CFLAGS"
+         CFLAGS="$CFLAGS -W -Werror"
+         AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[int f (void)
+                {
+                  typedef struct { int a; int b; } s_t;
+                  s_t s1 = { 0, };
+                  return s1.b;
+                }
+              ]],
+              [[]])],
+           [gl_cv_cc_nomfi_needed=no],
+           [gl_cv_cc_nomfi_needed=yes])
+         CFLAGS="$gl_save_CFLAGS"
+        ])
     fi
 
     dnl Next, check if -Werror -Wuninitialized is useful with the
     dnl user's choice of $CFLAGS; some versions of gcc warn that it
     dnl has no effect if -O is not also used
-    AC_MSG_CHECKING([whether -Wuninitialized is supported])
-    AC_CACHE_VAL([gl_cv_cc_uninitialized_supported], [
-      gl_save_CFLAGS="$CFLAGS"
-      CFLAGS="$CFLAGS -Werror -Wuninitialized"
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[]], [[]])],
-        [gl_cv_cc_uninitialized_supported=yes],
-        [gl_cv_cc_uninitialized_supported=no])
-      CFLAGS="$gl_save_CFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cc_uninitialized_supported])
+    AC_CACHE_CHECK([whether -Wuninitialized is supported],
+      [gl_cv_cc_uninitialized_supported],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror -Wuninitialized"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_uninitialized_supported=yes],
+         [gl_cv_cc_uninitialized_supported=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
 
   fi
 
diff --git a/m4/socklen.m4 b/m4/socklen.m4
index f2d996d0eb..fa79b07b6e 100644
--- a/m4/socklen.m4
+++ b/m4/socklen.m4
@@ -1,4 +1,4 @@
-# socklen.m4 serial 10
+# socklen.m4 serial 11
 dnl Copyright (C) 2005-2007, 2009-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,8 +15,8 @@ dnl So we have to test to find something that will work.
 AC_DEFUN([gl_TYPE_SOCKLEN_T],
   [AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])dnl
    AC_CHECK_TYPE([socklen_t], ,
-     [AC_MSG_CHECKING([for socklen_t equivalent])
-      AC_CACHE_VAL([gl_cv_socklen_t_equiv],
+     [AC_CACHE_CHECK([for socklen_t equivalent],
+        [gl_cv_socklen_t_equiv],
         [# Systems have either "struct sockaddr *" or
          # "void *" as the second argument to getpeername
          gl_cv_socklen_t_equiv=
@@ -34,11 +34,10 @@ AC_DEFUN([gl_TYPE_SOCKLEN_T],
            done
            test "$gl_cv_socklen_t_equiv" != "" && break
          done
-      ])
-      if test "$gl_cv_socklen_t_equiv" = ""; then
-        AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
-      fi
-      AC_MSG_RESULT([$gl_cv_socklen_t_equiv])
+         if test "$gl_cv_socklen_t_equiv" = ""; then
+           AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
+         fi
+        ])
       AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv],
         [type to use in place of socklen_t if not defined])],
      [gl_SOCKET_HEADERS])])
diff --git a/m4/sockpfaf.m4 b/m4/sockpfaf.m4
index e3fe2c45a0..cc47b8b586 100644
--- a/m4/sockpfaf.m4
+++ b/m4/sockpfaf.m4
@@ -1,4 +1,4 @@
-# sockpfaf.m4 serial 8
+# sockpfaf.m4 serial 9
 dnl Copyright (C) 2004, 2006, 2009-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -16,8 +16,8 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])
   AC_CHECK_HEADERS_ONCE([netinet/in.h])
 
-  AC_MSG_CHECKING([for IPv4 sockets])
-  AC_CACHE_VAL([gl_cv_socket_ipv4],
+  AC_CACHE_CHECK([for IPv4 sockets],
+    [gl_cv_socket_ipv4],
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
@@ -31,13 +31,12 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
 [[int x = AF_INET; struct in_addr y; struct sockaddr_in z;
  if (&x && &y && &z) return 0;]])],
        gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
-  AC_MSG_RESULT([$gl_cv_socket_ipv4])
   if test $gl_cv_socket_ipv4 = yes; then
     AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
   fi
 
-  AC_MSG_CHECKING([for IPv6 sockets])
-  AC_CACHE_VAL([gl_cv_socket_ipv6],
+  AC_CACHE_CHECK([for IPv6 sockets],
+    [gl_cv_socket_ipv6],
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
@@ -54,7 +53,6 @@ AC_DEFUN([gl_SOCKET_FAMILIES],
 [[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
  if (&x && &y && &z) return 0;]])],
        gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
-  AC_MSG_RESULT([$gl_cv_socket_ipv6])
   if test $gl_cv_socket_ipv6 = yes; then
     AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
   fi
@@ -65,8 +63,8 @@ AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])
   AC_CHECK_HEADERS_ONCE([sys/un.h])
 
-  AC_MSG_CHECKING([for UNIX domain sockets])
-  AC_CACHE_VAL([gl_cv_socket_unix],
+  AC_CACHE_CHECK([for UNIX domain sockets],
+    [gl_cv_socket_unix],
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
@@ -80,7 +78,6 @@ AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
 [[int x = AF_UNIX; struct sockaddr_un y;
  if (&x && &y) return 0;]])],
        gl_cv_socket_unix=yes, gl_cv_socket_unix=no)])
-  AC_MSG_RESULT([$gl_cv_socket_unix])
   if test $gl_cv_socket_unix = yes; then
     AC_DEFINE([HAVE_UNIXSOCKET], [1], [Define to 1 if <sys/socket.h> defines AF_UNIX.])
   fi
diff --git a/m4/stdarg.m4 b/m4/stdarg.m4
index d6f0508942..f89d38b3da 100644
--- a/m4/stdarg.m4
+++ b/m4/stdarg.m4
@@ -1,4 +1,4 @@
-# stdarg.m4 serial 6
+# stdarg.m4 serial 7
 dnl Copyright (C) 2006, 2008-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -11,19 +11,19 @@ AC_DEFUN([gl_STDARG_H],
 [
   STDARG_H=''
   NEXT_STDARG_H='<stdarg.h>'
-  AC_MSG_CHECKING([for va_copy])
-  AC_CACHE_VAL([gl_cv_func_va_copy], [
-    AC_COMPILE_IFELSE(
-      [AC_LANG_PROGRAM(
-         [[#include <stdarg.h>]],
-         [[
+  AC_CACHE_CHECK([for va_copy],
+    [gl_cv_func_va_copy],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <stdarg.h>]],
+          [[
 #ifndef va_copy
 void (*func) (va_list, va_list) = va_copy;
 #endif
-         ]])],
-      [gl_cv_func_va_copy=yes],
-      [gl_cv_func_va_copy=no])])
-  AC_MSG_RESULT([$gl_cv_func_va_copy])
+          ]])],
+       [gl_cv_func_va_copy=yes],
+       [gl_cv_func_va_copy=no])
+    ])
   if test $gl_cv_func_va_copy = no; then
     dnl Provide a substitute.
     dnl Usually a simple definition in <config.h> is enough. Not so on AIX 5
diff --git a/m4/visibility.m4 b/m4/visibility.m4
index 7e99764754..f53e0d524b 100644
--- a/m4/visibility.m4
+++ b/m4/visibility.m4
@@ -1,4 +1,4 @@
-# visibility.m4 serial 5 (gettext-0.18.2)
+# visibility.m4 serial 6
 dnl Copyright (C) 2005, 2008, 2010-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -29,42 +29,42 @@ AC_DEFUN([gl_VISIBILITY],
     dnl First, check whether -Werror can be added to the command line, or
     dnl whether it leads to an error because of some other option that the
     dnl user has put into $CC $CFLAGS $CPPFLAGS.
-    AC_MSG_CHECKING([whether the -Werror option is usable])
-    AC_CACHE_VAL([gl_cv_cc_vis_werror], [
-      gl_save_CFLAGS="$CFLAGS"
-      CFLAGS="$CFLAGS -Werror"
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[]], [[]])],
-        [gl_cv_cc_vis_werror=yes],
-        [gl_cv_cc_vis_werror=no])
-      CFLAGS="$gl_save_CFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cc_vis_werror])
+    AC_CACHE_CHECK([whether the -Werror option is usable],
+      [gl_cv_cc_vis_werror],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -Werror"
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM([[]], [[]])],
+         [gl_cv_cc_vis_werror=yes],
+         [gl_cv_cc_vis_werror=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
     dnl Now check whether visibility declarations are supported.
-    AC_MSG_CHECKING([for simple visibility declarations])
-    AC_CACHE_VAL([gl_cv_cc_visibility], [
-      gl_save_CFLAGS="$CFLAGS"
-      CFLAGS="$CFLAGS -fvisibility=hidden"
-      dnl We use the option -Werror and a function dummyfunc, because on some
-      dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
-      dnl "visibility attribute not supported in this configuration; ignored"
-      dnl at the first function definition in every compilation unit, and we
-      dnl don't want to use the option in this case.
-      if test $gl_cv_cc_vis_werror = yes; then
-        CFLAGS="$CFLAGS -Werror"
-      fi
-      AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM(
-           [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
-             extern __attribute__((__visibility__("default"))) int exportedvar;
-             extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
-             extern __attribute__((__visibility__("default"))) int exportedfunc (void);
-             void dummyfunc (void) {}
-           ]],
-           [[]])],
-        [gl_cv_cc_visibility=yes],
-        [gl_cv_cc_visibility=no])
-      CFLAGS="$gl_save_CFLAGS"])
-    AC_MSG_RESULT([$gl_cv_cc_visibility])
+    AC_CACHE_CHECK([for simple visibility declarations],
+      [gl_cv_cc_visibility],
+      [gl_save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fvisibility=hidden"
+       dnl We use the option -Werror and a function dummyfunc, because on some
+       dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
+       dnl "visibility attribute not supported in this configuration; ignored"
+       dnl at the first function definition in every compilation unit, and we
+       dnl don't want to use the option in this case.
+       if test $gl_cv_cc_vis_werror = yes; then
+         CFLAGS="$CFLAGS -Werror"
+       fi
+       AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+              extern __attribute__((__visibility__("default"))) int exportedvar;
+              extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+              extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+              void dummyfunc (void) {}
+            ]],
+            [[]])],
+         [gl_cv_cc_visibility=yes],
+         [gl_cv_cc_visibility=no])
+       CFLAGS="$gl_save_CFLAGS"
+      ])
     if test $gl_cv_cc_visibility = yes; then
       CFLAG_VISIBILITY="-fvisibility=hidden"
       HAVE_VISIBILITY=1