-# sys_select_h.m4 serial 1
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+# sys_select_h.m4 serial 7
+dnl Copyright (C) 2006-2009 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 Adapted from arpa_inet.m4, written by Simon Josefsson.
-
AC_DEFUN([gl_HEADER_SYS_SELECT],
[
- AC_CHECK_HEADERS_ONCE([sys/select.h])
- if test $ac_cv_header_sys_select_h = yes; then
+ AC_REQUIRE([gl_HEADER_SYS_SOCKET])
+ AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
+ AC_CACHE_CHECK([whether <sys/select.h> is self-contained],
+ [gl_cv_header_sys_select_h_selfcontained],
+ [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]],
+ [[struct timeval b;]])],
+ [gl_cv_header_sys_select_h_selfcontained=yes],
+ [gl_cv_header_sys_select_h_selfcontained=no])
+ ])
+ if test $gl_cv_header_sys_select_h_selfcontained = yes; then
SYS_SELECT_H=''
else
SYS_SELECT_H='sys/select.h'
+ gl_CHECK_NEXT_HEADERS([sys/select.h])
+ if test $ac_cv_header_sys_select_h = yes; then
+ HAVE_SYS_SELECT_H=1
+ else
+ HAVE_SYS_SELECT_H=0
+ fi
+ AC_SUBST([HAVE_SYS_SELECT_H])
+ gl_PREREQ_SYS_H_WINSOCK2
fi
- AC_SUBST(SYS_SELECT_H)
+ AC_SUBST([SYS_SELECT_H])
+])
+
+AC_DEFUN([gl_SYS_SELECT_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
+ GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_SYS_SELECT_H_DEFAULTS],
+[
+ GNULIB_SELECT=0; AC_SUBST([GNULIB_SELECT])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ REPLACE_SELECT=0; AC_SUBST([REPLACE_SELECT])
])