+/* WinSock destroys recv() buffer when send() failed.
+ * Enabled automatically for Windows and for Cygwin as Cygwin sockets are
+ * wrappers for WinSock sockets. https://github.com/curl/curl/issues/657
+ * Define DONT_USE_RECV_BEFORE_SEND_WORKAROUND to force disable workaround.
+ */
+#if !defined(DONT_USE_RECV_BEFORE_SEND_WORKAROUND)
+# if defined(WIN32) || defined(__CYGWIN__)
+# define USE_RECV_BEFORE_SEND_WORKAROUND
+# endif
+#else /* DONT_USE_RECV_BEFORE_SEND_WORKAROUNDS */
+# ifdef USE_RECV_BEFORE_SEND_WORKAROUND
+# undef USE_RECV_BEFORE_SEND_WORKAROUND
+# endif
+#endif /* DONT_USE_RECV_BEFORE_SEND_WORKAROUNDS */
+
+/* Detect Windows App environment which has a restricted access
+ * to the Win32 APIs. */
+# if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0602)
+# include <winapifamily.h>
+# if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \
+ !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+# define CURL_WINDOWS_APP
+# endif
+# endif
+