Building for mingw, I got this warning: libvirt.c:242: warning: control reaches end of non-void function Here's the fix: fix mingw compilation warning * src/libvirt.c (winsock_init) [HAVE_WINSOCK2_H]: Always return a value. diff --git a/src/libvirt.c b/src/libvirt.c index ca2675a..05a92d3 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -237,8 +237,7 @@ winsock_init (void) /* http://msdn2.microsoft.com/en-us/library/ms742213.aspx */ winsock_version = MAKEWORD (2, 2); err = WSAStartup (winsock_version, &winsock_data); - if (err != 0) - return -1; + return err == 0 ? 0 : -1; } #endif -- 1.6.0.2.588.g3102