X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=m4%2Finet_ntop.m4;h=45be497be23343a05862f4cc6e3175f184aacd92;hb=a9418e02e6cb59bfa004896c661d949f8b705209;hp=ee7ba5196c7d8e9236d43b266a7436780e6730ff;hpb=da79138de50a46870a8c56a7aef09bf66591c402;p=gnulib.git

diff --git a/m4/inet_ntop.m4 b/m4/inet_ntop.m4
index ee7ba5196..45be497be 100644
--- a/m4/inet_ntop.m4
+++ b/m4/inet_ntop.m4
@@ -1,21 +1,47 @@
-# inet_ntop.m4 serial 5
-dnl Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+# inet_ntop.m4 serial 15
+dnl Copyright (C) 2005-2006, 2008-2011 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_INET_NTOP],
+AC_DEFUN([gl_FUNC_INET_NTOP],
 [
-  AC_REQUIRE([gl_ARPA_INET_H_DEFAULTS])
-  ARPA_INET_H='arpa/inet.h'
+  dnl Persuade Solaris <arpa/inet.h> to declare inet_ntop.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
-  AC_REPLACE_FUNCS(inet_ntop)
-  gl_PREREQ_INET_NTOP
+  dnl Most platforms that provide inet_ntop define it in libc.
+  dnl Solaris 8..10 provide inet_ntop in libnsl instead.
+  HAVE_INET_NTOP=1
+  gl_save_LIBS=$LIBS
+  AC_SEARCH_LIBS([inet_ntop], [nsl], [],
+    [AC_CHECK_FUNCS([inet_ntop])
+     if test $ac_cv_func_inet_ntop = no; then
+       HAVE_INET_NTOP=0
+     fi
+    ])
+  LIBS=$gl_save_LIBS
+
+  INET_NTOP_LIB=
+  if test "$ac_cv_search_inet_ntop" != "no" &&
+     test "$ac_cv_search_inet_ntop" != "none required"; then
+    INET_NTOP_LIB="$ac_cv_search_inet_ntop"
+  fi
+  AC_SUBST([INET_NTOP_LIB])
+
+  AC_CHECK_HEADERS_ONCE([netdb.h])
+  AC_CHECK_DECLS([inet_ntop],,,
+    [#include <arpa/inet.h>
+     #if HAVE_NETDB_H
+     # include <netdb.h>
+     #endif
+    ])
+  if test $ac_cv_have_decl_inet_ntop = no; then
+    HAVE_DECL_INET_NTOP=0
+    AC_REQUIRE([AC_C_RESTRICT])
+  fi
 ])
 
 # Prerequisites of lib/inet_ntop.c.
 AC_DEFUN([gl_PREREQ_INET_NTOP], [
-  AC_CHECK_DECLS([inet_ntop],,,[#include <arpa/inet.h>])
   AC_REQUIRE([gl_SOCKET_FAMILIES])
-  AC_REQUIRE([AC_C_RESTRICT])
 ])