gnulib/import/m4/opendir.m4

   1 # opendir.m4 serial 5
   2 dnl Copyright (C) 2011-2019 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.
   6
   7 AC_DEFUN([gl_FUNC_OPENDIR],
   8 [
   9   AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
  10   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  11
  12   AC_CHECK_FUNCS([opendir])
  13   if test $ac_cv_func_opendir = no; then
  14     HAVE_OPENDIR=0
  15   fi
  16   dnl Replace opendir() for supporting the gnulib-defined fchdir() function,
  17   dnl to keep fchdir's bookkeeping up-to-date.
  18   m4_ifdef([gl_FUNC_FCHDIR], [
  19     gl_TEST_FCHDIR
  20     if test $HAVE_FCHDIR = 0; then
  21       if test $HAVE_OPENDIR = 1; then
  22         REPLACE_OPENDIR=1
  23       fi
  24     fi
  25   ])
  26   dnl Replace opendir() on OS/2 kLIBC to support dirfd() function replaced
  27   dnl by gnulib.
  28   case $host_os,$HAVE_OPENDIR in
  29     os2*,1)
  30       REPLACE_OPENDIR=1;;
  31   esac
  32 ])