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