added missing dependencies to fix failing unistr/ tests

[gnulib.git] / m4 / tsearch.m4

diff --git a/m4/tsearch.m4 b/m4/tsearch.m4
index 2a458f8..50a9aab 100644 (file)
--- a/m4/tsearch.m4
+++ b/m4/tsearch.m4
@@ -1,5 +1,5 @@
-# tsearch.m4 serial 2
-dnl Copyright (C) 2006-2007 Free Software Foundation, Inc.
+# tsearch.m4 serial 4
+dnl Copyright (C) 2006-2010 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.
@@ -8,7 +8,45 @@ AC_DEFUN([gl_FUNC_TSEARCH],
 [
   AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
   AC_CHECK_FUNCS([tsearch])
-  if test $ac_cv_func_tsearch = no; then
+  if test $ac_cv_func_tsearch = yes; then
+    dnl On OpenBSD 4.0, the return value of tdelete() is incorrect.
+    AC_REQUIRE([AC_PROG_CC])
+    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+    AC_CACHE_CHECK([whether tdelete works], [gl_cv_func_tdelete_works],
+      [
+        AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <stddef.h>
+#include <search.h>
+static int
+cmp_fn (const void *a, const void *b)
+{
+  return *(const int *) a - *(const int *) b;
+}
+int
+main ()
+{
+  int x = 0;
+  void *root = NULL;
+  if (!(tfind (&x, &root, cmp_fn) == NULL)) return 1;
+  tsearch (&x, &root, cmp_fn);
+  if (!(tfind (&x, &root, cmp_fn) != NULL)) return 1;
+  if (!(tdelete (&x, &root, cmp_fn) != NULL)) return 1;
+  return 0;
+}]])], [gl_cv_func_tdelete_works=yes], [gl_cv_func_tdelete_works=no],
+            [case "$host_os" in
+               openbsd*) gl_cv_func_tdelete_works="guessing no";;
+               *)        gl_cv_func_tdelete_works="guessing yes";;
+             esac
+            ])
+      ])
+    case "$gl_cv_func_tdelete_works" in
+      *no)
+        REPLACE_TSEARCH=1
+        AC_LIBOBJ([tsearch])
+        gl_PREREQ_TSEARCH
+        ;;
+    esac
+  else
     HAVE_TSEARCH=0
     AC_LIBOBJ([tsearch])
     gl_PREREQ_TSEARCH