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[gnulib.git] / m4 / search_h.m4

diff --git a/m4/search_h.m4 b/m4/search_h.m4
index a537e33..d9043d9 100644 (file)
--- a/m4/search_h.m4
+++ b/m4/search_h.m4
@@ -1,5 +1,5 @@
-# search_h.m4 serial 3
-dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
+# search_h.m4 serial 5
+dnl Copyright (C) 2007-2010 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.
@@ -7,6 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_SEARCH_H],
 [
   AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
+  AC_CHECK_HEADERS_ONCE([search.h])
   gl_CHECK_NEXT_HEADERS([search.h])
   if test $ac_cv_header_search_h = yes; then
     HAVE_SEARCH_H=1
@@ -14,6 +15,11 @@ AC_DEFUN([gl_SEARCH_H],
     HAVE_SEARCH_H=0
   fi
   AC_SUBST([HAVE_SEARCH_H])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <search.h>
+    ]], [tdelete tfind tsearch twalk])
 ])
 
 AC_DEFUN([gl_SEARCH_MODULE_INDICATOR],