1# read.m4 serial 2
2dnl Copyright (C) 2011 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_READ],
8[
9  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
10  dnl This ifdef is just an optimization, to avoid performing a configure
11  dnl check whose result is not used. It does not make the test of
12  dnl GNULIB_UNISTD_H_NONBLOCKING or GNULIB_NONBLOCKING redundant.
13  m4_ifdef([gl_NONBLOCKING_IO], [
14    gl_NONBLOCKING_IO
15    if test $gl_cv_have_nonblocking != yes; then
16      REPLACE_READ=1
17    fi
18  ])
19])
20