mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-26 07:33:47 +00:00
78 lines
3.2 KiB
Plaintext
78 lines
3.2 KiB
Plaintext
# socklen.m4 serial 10
|
|
dnl Copyright (C) 2005-2007, 2009-2017 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 From Albert Chin, Windows fixes from Simon Josefsson.
|
|
|
|
dnl Check for socklen_t: historically on BSD it is an int, and in
|
|
dnl POSIX 1g it is a type of its own, but some platforms use different
|
|
dnl types for the argument to getsockopt, getpeername, etc.:
|
|
dnl HP-UX 10.20, IRIX 6.5, OSF/1 4.0, Interix 3.5, BeOS.
|
|
dnl So we have to test to find something that will work.
|
|
|
|
AC_DEFUN([gl_TYPE_SOCKLEN_T],
|
|
[AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])dnl
|
|
AC_CHECK_TYPE([socklen_t], ,
|
|
[AC_MSG_CHECKING([for socklen_t equivalent])
|
|
AC_CACHE_VAL([gl_cv_socklen_t_equiv],
|
|
[# Systems have either "struct sockaddr *" or
|
|
# "void *" as the second argument to getpeername
|
|
gl_cv_socklen_t_equiv=
|
|
for arg2 in "struct sockaddr" void; do
|
|
for t in int size_t "unsigned int" "long int" "unsigned long int"; do
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
|
|
[[#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
int getpeername (int, $arg2 *, $t *);]],
|
|
[[$t len;
|
|
getpeername (0, 0, &len);]])],
|
|
[gl_cv_socklen_t_equiv="$t"])
|
|
test "$gl_cv_socklen_t_equiv" != "" && break
|
|
done
|
|
test "$gl_cv_socklen_t_equiv" != "" && break
|
|
done
|
|
])
|
|
if test "$gl_cv_socklen_t_equiv" = ""; then
|
|
AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
|
|
fi
|
|
AC_MSG_RESULT([$gl_cv_socklen_t_equiv])
|
|
AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv],
|
|
[type to use in place of socklen_t if not defined])],
|
|
[gl_SOCKET_HEADERS])])
|
|
|
|
dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
|
|
dnl it there too. But on Cygwin, wc2tcpip.h must not be included. Users
|
|
dnl of this module should use the same include pattern as gl_SOCKET_HEADERS.
|
|
dnl When you change this macro, keep also in sync:
|
|
dnl - gl_CHECK_SOCKET_HEADERS,
|
|
dnl - the Include section of modules/socklen.
|
|
AC_DEFUN([gl_SOCKET_HEADERS],
|
|
[
|
|
/* <sys/types.h> is not needed according to POSIX, but the
|
|
<sys/socket.h> in i386-unknown-freebsd4.10 and
|
|
powerpc-apple-darwin5.5 required it. */
|
|
#include <sys/types.h>
|
|
#if HAVE_SYS_SOCKET_H
|
|
# include <sys/socket.h>
|
|
#elif HAVE_WS2TCPIP_H
|
|
# include <ws2tcpip.h>
|
|
#endif
|
|
])
|
|
|
|
dnl Tests for the existence of the header for socket facilities.
|
|
dnl Defines the C macros HAVE_SYS_SOCKET_H, HAVE_WS2TCPIP_H.
|
|
dnl This macro must match gl_SOCKET_HEADERS.
|
|
AC_DEFUN([gl_CHECK_SOCKET_HEADERS],
|
|
[AC_CHECK_HEADERS_ONCE([sys/socket.h])
|
|
if test $ac_cv_header_sys_socket_h = no; then
|
|
dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
|
|
dnl the check for those headers unconditional; yet cygwin reports
|
|
dnl that the headers are present but cannot be compiled (since on
|
|
dnl cygwin, all socket information should come from sys/socket.h).
|
|
AC_CHECK_HEADERS([ws2tcpip.h])
|
|
fi
|
|
])
|