1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
# gethostname.m4 serial 7
dnl Copyright (C) 2002, 2008, 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.
# Ensure
# - the gethostname() function,
# - the HOST_NAME_MAX macro in <limits.h>.
AC_DEFUN([gl_FUNC_GETHOSTNAME],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
gl_PREREQ_SYS_H_WINSOCK2
dnl Where is gethostname() defined?
dnl - On native Windows, it is in ws2_32.dll.
dnl - Otherwise is is in libc.
GETHOSTNAME_LIB=
AC_CHECK_FUNCS([gethostname], , [
AC_CACHE_CHECK([for gethostname in winsock2.h and -lws2_32],
[gl_cv_w32_gethostname],
[gl_cv_w32_gethostname=no
gl_save_LIBS="$LIBS"
LIBS="$LIBS -lws2_32"
AC_TRY_LINK([
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#include <stddef.h>
], [gethostname(NULL, 0);], [gl_cv_w32_gethostname=yes])
LIBS="$gl_save_LIBS"
])
if test "$gl_cv_w32_gethostname" = "yes"; then
GETHOSTNAME_LIB="-lws2_32"
fi
])
AC_SUBST([GETHOSTNAME_LIB])
if test "$ac_cv_func_gethostname" = no; then
AC_LIBOBJ([gethostname])
HAVE_GETHOSTNAME=0
gl_PREREQ_GETHOSTNAME
fi
dnl Also provide HOST_NAME_MAX when <limits.h> lacks it.
if test "$gl_cv_w32_gethostname" = "yes"; then
# <http://msdn.microsoft.com/en-us/library/ms738527.aspx> says:
# "if a buffer of 256 bytes is passed in the name parameter and
# the namelen parameter is set to 256, the buffer size will always
# be adequate."
AC_DEFINE([HOST_NAME_MAX], [256],
[Define HOST_NAME_MAX when <limits.h> does not define it.])
fi
])
# Prerequisites of lib/gethostname.c.
AC_DEFUN([gl_PREREQ_GETHOSTNAME], [
if test "$gl_cv_w32_gethostname" != "yes"; then
AC_CHECK_FUNCS([uname])
fi
])
|
