Hi,

I have a program that works fine on Solaris and Linux and I want to port it to work to on Cygwin, but am having issues getting Boost.asio to compile.

The problem is it wants me to set some defines which I believe makes it use the native Windows socket interface (winsock) where as I want it to use the Cygwin socket interface because the program uses other libraries that expect the Cygwin socket interface. I want to be able to compile a program like this:

$ cat prog.cc 

#include <net-snmp/net-snmp-config.h>

#include <net-snmp/net-snmp-includes.h>

#include <net-snmp/agent/net-snmp-agent-includes.h>

#include <boost/asio.hpp>

int main() {}

$

To get the above code to compile when only including boost/asio.hpp I have to use the following:

g++ -D_WIN32_WINNT=0x0501 -D__USE_W32_SOCKETS \

    -I$BOOST_ROOT/include -I$NETSNMP_HOME/include \

    prog.cc \

    -L$BOOST_ROOT/lib -lboost_system -lws2_32

But the net-snmp headers fail when added, where as when I remove the include for the asio header file and remove -D_WIN32_WINNT=0x0501, -D__USE_W32_SOCKETS and -lws2_32 from the compile line then the net-snmp headers compile fine - but the asio will fail.

g++  -I$BOOST_ROOT/include -I$NETSNMP_HOME/include prog.cc -L$BOOST_ROOT/lib -lboost_system

Is there a define I can set so that boost.asio uses the Cygwin sockets? I would have thought that this would be the expected behaviour when compiling on Cygwin.

The version of Cygwin is:

$ uname -a

CYGWIN_NT-6.0 toshiba-PC 1.7.10(0.259/5/3) 2012-02-05 12:36 i686 Cygwin

The version of boost is:

boost_1_48_0

Thanks