# search_h.m4 serial 9

dnl Copyright (C) 2007-2017 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])

  REPLACE_TSEARCH=0; AC_SUBST([REPLACE_TSEARCH])

])