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
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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