1 # sys_select_h.m4 serial 7
2 dnl Copyright (C) 2006-2009 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.
7 AC_DEFUN([gl_HEADER_SYS_SELECT],
9 AC_REQUIRE([gl_HEADER_SYS_SOCKET])
10 AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
11 AC_CACHE_CHECK([whether <sys/select.h> is self-contained],
12 [gl_cv_header_sys_select_h_selfcontained],
14 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]],
15 [[struct timeval b;]])],
16 [gl_cv_header_sys_select_h_selfcontained=yes],
17 [gl_cv_header_sys_select_h_selfcontained=no])
19 if test $gl_cv_header_sys_select_h_selfcontained = yes; then
22 SYS_SELECT_H='sys/select.h'
23 gl_CHECK_NEXT_HEADERS([sys/select.h])
24 if test $ac_cv_header_sys_select_h = yes; then
29 AC_SUBST([HAVE_SYS_SELECT_H])
30 gl_PREREQ_SYS_H_WINSOCK2
32 AC_SUBST([SYS_SELECT_H])
35 AC_DEFUN([gl_SYS_SELECT_MODULE_INDICATOR],
37 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
38 AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
39 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
42 AC_DEFUN([gl_SYS_SELECT_H_DEFAULTS],
44 GNULIB_SELECT=0; AC_SUBST([GNULIB_SELECT])
45 dnl Assume proper GNU behavior unless another module says otherwise.
46 REPLACE_SELECT=0; AC_SUBST([REPLACE_SELECT])