| # nonblocking.m4 serial 2 |
| dnl Copyright (C) 2011-2020 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. |
| |
| dnl Tests whether non-blocking I/O is natively supported by read(), write(). |
| dnl Sets gl_cv_have_nonblocking. |
| dnl Also tests whether open() supports O_NONBLOCK. |
| dnl Sets gl_cv_have_open_O_NONBLOCK. |
| AC_DEFUN([gl_NONBLOCKING_IO], |
| [ |
| dnl Use AC_REQUIRE here, so that the default behavior below is expanded |
| dnl once only, before all statements that occur in other macros. |
| AC_REQUIRE([gl_NONBLOCKING_IO_BODY]) |
| ]) |
| |
| AC_DEFUN([gl_NONBLOCKING_IO_BODY], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| case "$host_os" in |
| mingw*) gl_cv_have_nonblocking=no ;; |
| *) gl_cv_have_nonblocking=yes ;; |
| esac |
| case "$host_os" in |
| mingw*) gl_cv_have_open_O_NONBLOCK=no ;; |
| *) gl_cv_have_open_O_NONBLOCK=yes ;; |
| esac |
| ]) |
