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# search_h.m4 serial 10
dnl Copyright (C) 2007-2018 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_SEARCH_H],
[
AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
gl_CHECK_NEXT_HEADERS([search.h])
if test $ac_cv_header_search_h = yes; then
HAVE_SEARCH_H=1
else
HAVE_SEARCH_H=0
fi
AC_SUBST([HAVE_SEARCH_H])
if test $HAVE_SEARCH_H = 1; then
AC_CACHE_CHECK([for type VISIT], [gl_cv_type_VISIT],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#if HAVE_SEARCH_H
#include <search.h>
#endif
]],
[[static VISIT x; x = postorder;]])],
[gl_cv_type_VISIT=yes],
[gl_cv_type_VISIT=no])])
else
gl_cv_type_VISIT=no
fi
if test $gl_cv_type_VISIT = yes; then
HAVE_TYPE_VISIT=1
else
HAVE_TYPE_VISIT=0
fi
AC_SUBST([HAVE_TYPE_VISIT])
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],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
AC_DEFUN([gl_SEARCH_H_DEFAULTS],
[
GNULIB_TSEARCH=0; AC_SUBST([GNULIB_TSEARCH])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_TSEARCH=1; AC_SUBST([HAVE_TSEARCH])
HAVE_TWALK=1; AC_SUBST([HAVE_TWALK])
REPLACE_TSEARCH=0; AC_SUBST([REPLACE_TSEARCH])
])
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