No need for screenshots, text is enough.

(In reply to zydadan from comment #0)
> checking ws2tcpip.h usability... no
> checking ws2tcpip.h presence... yes
> configure: WARNING: ws2tcpip.h: present but cannot be compiled
> configure: WARNING: ws2tcpip.h:     check for missing prerequisite headers?
> configure: WARNING: ws2tcpip.h: see the Autoconf documentation
> configure: WARNING: ws2tcpip.h:     section "Present But Cannot Be Compiled"

If you look in config.log you should find detailed compiler errors from what happens when configure tries to #include <ws2tcpip.h>. Please provide those here.

It looks as though it might be necessary to #include <winsock2.h> first: <https://msdn.microsoft.com/en-us/library/windows/desktop/ms738562%28v=vs.85%29.aspx>

Alternatively, it seems that we already include that header unconditionally on Windows:

(dbus/dbus-sysdeps.h)
#ifdef DBUS_WIN
#include <ws2tcpip.h>
#endif

so we can probably just drop this check from the Autoconf and CMake build systems, and change

#ifdef HAVE_WS2TCPIP_H
/* getaddrinfo for Windows CE (and Windows).  */
#include <ws2tcpip.h>
#endif

to just

#include <ws2tcpip.h>

in dbus/dbus-sysdeps-win.c.

(In reply to zydadan from comment #0)
> ...
> configure: error: Explicitly requested expat but expat not found

there are no expat development header available.

Created attachment 115439 [details]
config.log which is generated in ./configure failure, as you wish.

(In reply to zydadan from comment #0)
> checking for ws2tcpip.h... no
> ...
> configure: error: Explicitly requested expat but expat not found

As Ralf spotted, these two issues are unrelated. There are two unrelated failures in this log:

1) ws2tcpip.h
=============

The check for ws2tcpip.h detects it as present but unusable. Looking into the detailed log, we see:

In file included from /usr/include/w32api/winsock2.h:56:0,
                 from /usr/include/w32api/ws2tcpip.h:17,
                 from conftest.c:110:
/usr/include/w32api/psdk_inc/_fd_types.h:100:2: warning: #warning "fd_set and associated macros have been defined in sys/types.      This can cause runtime problems with W32 sockets" [-Wcpp]
 #warning "fd_set and associated macros have been defined in sys/types.  \
  ^
In file included from /usr/include/w32api/ws2tcpip.h:17:0,
                 from conftest.c:110:
/usr/include/w32api/winsock2.h:1004:34: error: conflicting types for 'gethostname'
   WINSOCK_API_LINKAGE int WSAAPI gethostname(char *name,int namelen);
                                  ^
In file included from /usr/include/stdio.h:29:0,
                 from conftest.c:77:
/usr/include/sys/unistd.h:249:6: note: previous declaration of 'gethostname' was here
  int _EXFUN(gethostname, (char *__name, size_t __len));
      ^

I think this means that your development environment is broken... you can only have one correct signature for gethostname().

You used:

> --host=x86_64-pc-msys

but on my Debian system, the mingw-w64 cross-build environment uses the GNU tuple x86_64-w64-mingw32, and this seems to be the canonical one as documented on http://sourceforge.net/p/mingw-w64/wiki2/TypeTriplets/.

2) Expat
========

> configure: error: Explicitly requested expat but expat not found

You don't have Expat development files installed. Compiling D-Bus requires Expat. There is no workaround or way to avoid this, you must obtain a suitable Expat library before continuing.

Neither of these two issues seems to be a bug in D-Bus.

Thanks for you all!

I'm compiling dbus in windows7 64bit with msys2 64bit.

Even when I installed all the expat component and pass '--host=x86_64-w64-mingw32' to ./configure, there are still many problems in compiling.

1. expat component installed, pass '--host=x86_64-w64-mingw32' to ./configure, but ./configure still reports error:
configure: error: Explicitly requested expat but expat not found

2. expat component installed, do not pass '--host=x86_64-w64-mingw32' to ./configure. configuration succeeds, but error raised in compiling :

activation-helper.c: 在函数‘switch_user’中:
activation-helper.c:308:3: 警告：隐式声明函数‘initgroups’ [-Wimplicit-function-declaration]
   if (initgroups (user, pw->pw_gid))
   ^
activation-helper.c:308:3: 警告：对‘initgroups’的嵌套的外部声明 [-Wnested-externs]

I think this should still not be the bug of dbus -- just as Mr.Simon McVittie mentioned --. but, could you help me to solve it if possible? thanks!

Well, I've made the compilation passed in msys2 on windows 7 by doing as below:
In MINGW32 shell, add "--host=i686-w64-mingw32 --build=i686-pc-msys" as extra options to ./configure
In MINGW64 shell, add "--host=x86_64-w64-mingw32 --build=x86_64-pc-msys" as extra options to ./configure
In MSYS2 shell, it seems that there is no way to make compilation passed.