2 dnl Copyright (C) 2007-2017 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_SEARCH_H],
9 AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
10 gl_CHECK_NEXT_HEADERS([search.h])
11 if test $ac_cv_header_search_h = yes; then
16 AC_SUBST([HAVE_SEARCH_H])
18 if test $HAVE_SEARCH_H = 1; then
19 AC_CACHE_CHECK([for type VISIT], [gl_cv_type_VISIT],
26 [[static VISIT x; x = postorder;]])],
27 [gl_cv_type_VISIT=yes],
28 [gl_cv_type_VISIT=no])])
32 if test $gl_cv_type_VISIT = yes; then
37 AC_SUBST([HAVE_TYPE_VISIT])
39 dnl Check for declarations of anything we want to poison if the
40 dnl corresponding gnulib module is not in use.
41 gl_WARN_ON_USE_PREPARE([[#include <search.h>
42 ]], [tdelete tfind tsearch twalk])
45 AC_DEFUN([gl_SEARCH_MODULE_INDICATOR],
47 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
48 AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
49 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
50 dnl Define it also as a C macro, for the benefit of the unit tests.
51 gl_MODULE_INDICATOR_FOR_TESTS([$1])
54 AC_DEFUN([gl_SEARCH_H_DEFAULTS],
56 GNULIB_TSEARCH=0; AC_SUBST([GNULIB_TSEARCH])
57 dnl Assume proper GNU behavior unless another module says otherwise.
58 HAVE_TSEARCH=1; AC_SUBST([HAVE_TSEARCH])
59 REPLACE_TSEARCH=0; AC_SUBST([REPLACE_TSEARCH])