X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Freadutmp.m4;h=a22efcef9b598fe2ae56125f4490eb8b05d381ce;hb=831b84c59ef413c57a36b67344467d66a8a2ba70;hp=dd9ae9e600f8c20bb541a6c16f77a45ea31d8496;hpb=44d7c1c1f004fa9bfb8ec3948de2671a7958cf5b;p=gnulib.git

diff --git a/m4/readutmp.m4 b/m4/readutmp.m4
index dd9ae9e60..a22efcef9 100644
--- a/m4/readutmp.m4
+++ b/m4/readutmp.m4
@@ -1,26 +1,36 @@
-# readutmp.m4 serial 6
-dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# readutmp.m4 serial 20
+dnl Copyright (C) 2002-2013 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_READUTMP],
 [
-  dnl Prerequisites of lib/readutmp.h.
-  AC_CHECK_HEADERS(utmp.h utmpx.h)
-  AC_CHECK_FUNCS(utmpname utmpxname)
-  AC_CHECK_DECLS(getutent,,,[
+  dnl Persuade utmpx.h to declare utmpxname
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_HEADERS_ONCE([utmp.h utmpx.h])
+  if test $ac_cv_header_utmp_h = yes || test $ac_cv_header_utmpx_h = yes; then
+    dnl Prerequisites of lib/readutmp.h and lib/readutmp.c.
+    AC_CHECK_FUNCS_ONCE([utmpname utmpxname])
+    AC_CHECK_DECLS([getutent],,,[[
+/* <sys/types.h> is a prerequisite of <utmp.h> on FreeBSD 8.0, OpenBSD 4.6.  */
+#include <sys/types.h>
 #ifdef HAVE_UTMP_H
 # include <utmp.h>
 #endif
-])
-  if test $ac_cv_header_utmp_h = yes || test $ac_cv_header_utmpx_h = yes; then
+]])
     utmp_includes="\
-$ac_includes_default
+AC_INCLUDES_DEFAULT
 #ifdef HAVE_UTMPX_H
 # include <utmpx.h>
 #endif
 #ifdef HAVE_UTMP_H
+# if defined _THREAD_SAFE && defined UTMP_DATA_INIT
+   /* When including both utmp.h and utmpx.h on AIX 4.3, with _THREAD_SAFE
+      defined, work around the duplicate struct utmp_data declaration.  */
+#  define utmp_data gl_aix_4_3_workaround_utmp_data
+# endif
 # include <utmp.h>
 #endif
 "
@@ -46,14 +56,5 @@ $ac_includes_default
     AC_CHECK_MEMBERS([struct utmp.ut_exit.ut_termination],,,[$utmp_includes])
     AC_CHECK_MEMBERS([struct utmpx.ut_exit.e_termination],,,[$utmp_includes])
     AC_CHECK_MEMBERS([struct utmp.ut_exit.e_termination],,,[$utmp_includes])
-
-    AC_LIBOBJ(readutmp)
-    gl_PREREQ_READUTMP
   fi
 ])
-
-# Prerequisites of lib/readutmp.c.
-AC_DEFUN([gl_PREREQ_READUTMP],
-[
-  AC_REQUIRE([gl_FUNC_FREE])
-])