Re: Why configure failed to search libws2_32.a in MinGW+MSYS ?

[Bob Friesenhahn]

On Fri, 27 Dec 2013, Guo Leaveye wrote:
> > checking dependency style of gcc... gcc3
> > checking for WSAGetLastError in -lws2_32... no
> > checking for WSAGetLastError in -llibws2_32... no
> > configure: creating ./config.status
> > config.status: creating Makefile
> > config.status: executing depfiles commands
>
> Note that, (1) both library libws2_32.a check report `no', and (2) the compiler 
> is exactly my simulation target `gcc'.
>
> I know that I can add a check into configure.ac to examine whether building in 
> mingw or cygwin, but is this checking supposed to be fully examination for the 
> real build environment ? If it works fine, LIB variable should be full filled 
> with all required library link options. If there a simple way by adjust my 
> MSYS+MinGW environment to make autoconf works, please tell me.

Look in the generated config.log for the errors produced while testing 
for WSAGetLastError.  The errors may provide a clue as to what has 
actually gone wrong and lead to fixing the problem.  Autoconf tests 
for library functions by linking a small test program.  Sometimes it 
is necessary to supply additional libraries in order to successfully 
link with a library.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/