-# tsearch.m4 serial 2
-dnl Copyright (C) 2006-2007 Free Software Foundation, Inc.
+# tsearch.m4 serial 3
+dnl Copyright (C) 2006-2008 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_REQUIRE([gl_SEARCH_H_DEFAULTS])
AC_CHECK_FUNCS([tsearch])
- if test $ac_cv_func_tsearch = no; then
+ if test $ac_cv_func_tsearch = yes; then
+ dnl On OpenBSD 4.0, the return value of tdelete() is incorrect.
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether tdelete works], [gl_cv_func_tdelete_works],
+ [
+ AC_TRY_RUN([
+#include <stddef.h>
+#include <search.h>
+static int
+cmp_fn (const void *a, const void *b)
+{
+ return *(const int *) a - *(const int *) b;
+}
+int
+main ()
+{
+ int x = 0;
+ void *root = NULL;
+ if (!(tfind (&x, &root, cmp_fn) == NULL)) return 1;
+ tsearch (&x, &root, cmp_fn);
+ if (!(tfind (&x, &root, cmp_fn) != NULL)) return 1;
+ if (!(tdelete (&x, &root, cmp_fn) != NULL)) return 1;
+ return 0;
+}], [gl_cv_func_tdelete_works=yes], [gl_cv_func_tdelete_works=no],
+ [case "$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