| 1 | # poll_h.m4 serial 2 |
| 2 | dnl Copyright (C) 2010-2013 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 | dnl Written by Bruno Haible. |
| 8 | |
| 9 | AC_DEFUN([gl_POLL_H], |
| 10 | [ |
| 11 | dnl Use AC_REQUIRE here, so that the default behavior below is expanded |
| 12 | dnl once only, before all statements that occur in other macros. |
| 13 | AC_REQUIRE([gl_POLL_H_DEFAULTS]) |
| 14 | |
| 15 | AC_CHECK_HEADERS_ONCE([poll.h]) |
| 16 | if test $ac_cv_header_poll_h = yes; then |
| 17 | HAVE_POLL_H=1 |
| 18 | else |
| 19 | HAVE_POLL_H=0 |
| 20 | fi |
| 21 | AC_SUBST([HAVE_POLL_H]) |
| 22 | |
| 23 | dnl <poll.h> is always overridden, because of GNULIB_POSIXCHECK. |
| 24 | gl_CHECK_NEXT_HEADERS([poll.h]) |
| 25 | |
| 26 | dnl Check for declarations of anything we want to poison if the |
| 27 | dnl corresponding gnulib module is not in use. |
| 28 | gl_WARN_ON_USE_PREPARE([[#include <poll.h>]], |
| 29 | [poll]) |
| 30 | ]) |
| 31 | |
| 32 | AC_DEFUN([gl_POLL_MODULE_INDICATOR], |
| 33 | [ |
| 34 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| 35 | AC_REQUIRE([gl_POLL_H_DEFAULTS]) |
| 36 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| 37 | dnl Define it also as a C macro, for the benefit of the unit tests. |
| 38 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| 39 | ]) |
| 40 | |
| 41 | AC_DEFUN([gl_POLL_H_DEFAULTS], |
| 42 | [ |
| 43 | GNULIB_POLL=0; AC_SUBST([GNULIB_POLL]) |
| 44 | dnl Assume proper GNU behavior unless another module says otherwise. |
| 45 | HAVE_POLL=1; AC_SUBST([HAVE_POLL]) |
| 46 | REPLACE_POLL=0; AC_SUBST([REPLACE_POLL]) |
| 47 | ]) |