1 # sys_socket_h.m4 serial 12
2 dnl Copyright (C) 2005-2008 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 dnl From Simon Josefsson.
9 AC_DEFUN([gl_HEADER_SYS_SOCKET],
11 AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
12 AC_REQUIRE([AC_C_INLINE])
14 AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
15 [gl_cv_header_sys_socket_h_selfcontained],
17 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
18 [gl_cv_header_sys_socket_h_selfcontained=yes],
19 [gl_cv_header_sys_socket_h_selfcontained=no])
21 if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
23 dnl If the shutdown function exists, <sys/socket.h> should define
24 dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
25 AC_CHECK_FUNCS([shutdown])
26 if test $ac_cv_func_shutdown = yes; then
27 AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
28 [gl_cv_header_sys_socket_h_shut],
31 [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
32 [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
33 [gl_cv_header_sys_socket_h_shut=yes],
34 [gl_cv_header_sys_socket_h_shut=no])
36 if test $gl_cv_header_sys_socket_h_shut = no; then
37 SYS_SOCKET_H='sys/socket.h'
41 SYS_SOCKET_H='sys/socket.h'
43 if test -n "$SYS_SOCKET_H"; then
44 dnl Check prerequisites of the <sys/socket.h> replacement.
45 gl_CHECK_NEXT_HEADERS([sys/socket.h])
46 if test $ac_cv_header_sys_socket_h = yes; then
51 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
52 dnl the check for those headers unconditional; yet cygwin reports
53 dnl that the headers are present but cannot be compiled (since on
54 dnl cygwin, all socket information should come from sys/socket.h).
55 AC_CHECK_HEADERS([ws2tcpip.h])
56 if test $ac_cv_header_ws2tcpip_h = yes; then
62 gl_PREREQ_SYS_H_WINSOCK2
63 AC_SUBST([HAVE_SYS_SOCKET_H])
64 AC_SUBST([HAVE_WS2TCPIP_H])
66 AC_SUBST([SYS_SOCKET_H])
69 # Common prerequisites of of the <sys/socket.h> replacement and of the
70 # <sys/select.h> replacement.
71 # Sets and substitutes HAVE_WINSOCK2_H.
72 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
74 m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
75 m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
76 AC_CHECK_HEADERS_ONCE([sys/socket.h])
77 if test $ac_cv_header_sys_socket_h != yes; then
78 dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
79 dnl the check for those headers unconditional; yet cygwin reports
80 dnl that the headers are present but cannot be compiled (since on
81 dnl cygwin, all socket information should come from sys/socket.h).
82 AC_CHECK_HEADERS([winsock2.h])
84 if test "$ac_cv_header_winsock2_h" = yes; then
86 UNISTD_H_HAVE_WINSOCK2_H=1
87 SYS_IOCTL_H_HAVE_WINSOCK2_H=1
91 AC_SUBST([HAVE_WINSOCK2_H])
94 AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
96 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
97 AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
98 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
101 AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
103 GNULIB_SOCKET=0; AC_SUBST([GNULIB_SOCKET])
104 GNULIB_CONNECT=0; AC_SUBST([GNULIB_CONNECT])
105 GNULIB_ACCEPT=0; AC_SUBST([GNULIB_ACCEPT])
106 GNULIB_BIND=0; AC_SUBST([GNULIB_BIND])
107 GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
108 GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
109 GNULIB_GETSOCKOPT=0; AC_SUBST([GNULIB_GETSOCKOPT])
110 GNULIB_LISTEN=0; AC_SUBST([GNULIB_LISTEN])
111 GNULIB_RECV=0; AC_SUBST([GNULIB_RECV])
112 GNULIB_SEND=0; AC_SUBST([GNULIB_SEND])
113 GNULIB_RECVFROM=0; AC_SUBST([GNULIB_RECVFROM])
114 GNULIB_SENDTO=0; AC_SUBST([GNULIB_SENDTO])
115 GNULIB_SETSOCKOPT=0; AC_SUBST([GNULIB_SETSOCKOPT])
116 GNULIB_SHUTDOWN=0; AC_SUBST([GNULIB_SHUTDOWN])