chown: Update doc regarding AIX.

[gnulib.git] / m4 / getlogin_r.m4

diff --git a/m4/getlogin_r.m4 b/m4/getlogin_r.m4
index 589d626..5d6f1b2 100644 (file)
--- a/m4/getlogin_r.m4
+++ b/m4/getlogin_r.m4
@@ -1,6 +1,6 @@
-#serial 3
+#serial 7
 
-# Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2005-2007, 2009-2010 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -11,23 +11,27 @@ dnl
 dnl Provide getlogin_r when the system lacks it.
 dnl
 
-AC_DEFUN([gl_GETLOGIN_R_SUBSTITUTE],
+AC_DEFUN([gl_FUNC_GETLOGIN_R],
 [
-  gl_PREREQ_GETLOGIN_R
-  AC_LIBOBJ([getlogin_r])
-])
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
 
-AC_DEFUN([gl_GETLOGIN_R],
-[
-  AC_REPLACE_FUNCS([getlogin_r])
+  dnl Persuade glibc <unistd.h> to declare getlogin_r().
+  dnl Persuade Solaris <unistd.h> to provide the POSIX compliant declaration of
+  dnl getlogin_r().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([getlogin_r])
   if test $ac_cv_func_getlogin_r = no; then
-    gl_GETLOGIN_R_SUBSTITUTE
+    AC_LIBOBJ([getlogin_r])
+    gl_PREREQ_GETLOGIN_R
+    AC_CHECK_DECLS_ONCE([getlogin_r])
+    if test $ac_cv_have_decl_getlogin_r = no; then
+      HAVE_DECL_GETLOGIN_R=0
+    fi
   fi
 ])
 
 AC_DEFUN([gl_PREREQ_GETLOGIN_R],
 [
-  AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CHECK_DECLS_ONCE([getlogin])
-  AC_CHECK_DECLS_ONCE([getlogin_r])
 ])