As a result/summary of the original question, to make all the elsewhere code simple and as a replacement of AC_CHECK_LIB, I use the autoconf macro like this:
AC_CHECK_HEADER([winsock2.h],
[AC_DEFINE([HAVE_LIBWS2_32], [1], [Define if libws2_32 exists.])
LIBS="-lws2_32 $LIBS"],
[],
[#include <windows.h>])
Which suppose that a build environment should have installed a libws2_32.a in
case of winsock2.h can be founded in default include directories.
Levi G.
Haskell is a beautiful language.
在 2013/12/30，上午11:04，Guo Leaveye <leaveye....@gmail.com> 写道：
> I have found the answer, and another question still here.
>
> I have tried `gcc -E' (only preprocessed) on the #include version, and
> checked the output source to view the WSAGetLastError()'s declaration. Then I
> know this is a conflict between cdecl and stddecl.
>
> As google says
> (http://lists.gnu.org/archive/html/autoconf/2006-01/msg00109.html), there is
> no standard macro to handle the stddecl checking.
>
> So before a set of stddecl-checking macros creates, to check the build
> envionment may be the easiest way to check the libraries' existance.
>
> And the question is that, is there any open sourced 3rd-party macros to
> handle this ?
>
> Levi G.
> Haskell is a beautiful language.
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