# opendir.m4 serial 5

dnl Copyright (C) 2011-2018 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_FUNC_OPENDIR],

[

  AC_REQUIRE([gl_DIRENT_H_DEFAULTS])

  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

  AC_CHECK_FUNCS([opendir])

  if test $ac_cv_func_opendir = no; then

    HAVE_OPENDIR=0

  fi

  dnl Replace opendir() for supporting the gnulib-defined fchdir() function,

  dnl to keep fchdir's bookkeeping up-to-date.

  m4_ifdef([gl_FUNC_FCHDIR], [

    gl_TEST_FCHDIR

    if test $HAVE_FCHDIR = 0; then

      if test $HAVE_OPENDIR = 1; then

        REPLACE_OPENDIR=1

      fi

    fi

  ])

  dnl Replace opendir() on OS/2 kLIBC to support dirfd() function replaced

  dnl by gnulib.

  case $host_os,$HAVE_OPENDIR in

    os2*,1)

      REPLACE_OPENDIR=1;;

  esac

])