MinGW include paths conflict - c++

Question

I'm trying to cross-compile on Linux for Win64 using MinGW-w64. Here's my code
#include <cstdlib>
#include <iostream>
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_generators.hpp>
#include <boost/uuid/uuid_io.hpp>
int main(int argc, char** argv)
{
if (argc > 1)
std::cout << std::atoi(argv[1]) << std::endl;
std::cout << boost::uuids::random_generator()() << std::endl;
return 0;
}
A simple compile fails with the error
$ x86_64-w64-mingw32-c++ hello.cpp
hello.cpp:4:31: fatal error: boost/uuid/uuid.hpp: No such file or directory
#include <boost/uuid/uuid.hpp>
^
Boost is installed in /usr/include which apparently the MinGW compiler doesn't search. If I add that path, then...
$ x86_64-w64-mingw32-c++ -I/usr/include hello.cpp
In file included from /usr/include/stdlib.h:314:0,
from /usr/x86_64-w64-mingw32/include/c++/4.9.1/cstdlib:72,
from hello.cpp:1:
/usr/include/sys/types.h:109:19: error: conflicting declaration ‘typedef __ssize_t ssize_t’
typedef __ssize_t ssize_t;
^
MinGW's cstdlib is including /usr/include/stdlib.h instead of /usr/x86_64-w64-mingw32/include/stdlib.h! How do I solve this? I need the -I in order to include Boost, but then MinGW includes other headers incorrectly.

Answer 1

You cannot use boost headers from /usr/include to cross-compile windows binaries.
You should also cross-compile boost.
See this guide for details about how to cross-compile boost on linux (it's for vle, but the first part is about boost):
http://www.vle-project.org/wiki/Cross_compilation_Win32
Update: Given that the guide is a little bit old, makes sense to link to boost documentation:
http://www.boost.org/boost-build2/doc/html/bbv2/tasks/crosscompile.html