From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Some GNULIB headers (eg unistd.h) will often need to include winsock2.h for various symbols. There is a rule that winsock2.h must be included before windows.h. This means that any file which does #ifdef WIN32 #include <windows.h> #endif #include <unistd.h> is potentially broken. A simple rule is that /all/ includes of windows.h must be matched with a preceeding include of winsock2.h regardless of whether unistd.h is used currently --- src/util/util.c | 3 +++ src/vbox/vbox_MSCOMGlue.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/src/util/util.c b/src/util/util.c index 28a4fe7..a71b0d6 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -65,6 +65,9 @@ #endif #ifdef WIN32 +# ifdef HAVE_WINSOCK2_H +# include <winsock2.h> +# endif # include <windows.h> # include <shlobj.h> #endif diff --git a/src/vbox/vbox_MSCOMGlue.c b/src/vbox/vbox_MSCOMGlue.c index b07d6a7..68810fb 100644 --- a/src/vbox/vbox_MSCOMGlue.c +++ b/src/vbox/vbox_MSCOMGlue.c @@ -22,6 +22,9 @@ #include <config.h> +#ifdef HAVE_WINSOCK2_H +# include <winsock2.h> +#endif #include <windows.h> #define nsCID CLSID -- 1.7.10.2