m4/read.m4

   1 # read.m4 serial 1
   2 dnl Copyright (C) 2011 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_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       AC_LIBOBJ([read])
  18     fi
  19   ])
  20 ])