[ win64 ] os dependent socket blocking

doc/cross_debug.txt

@@ -18,7 +18,7 @@ fix eventual complications.
 
 Let's walkthrough a simple example. In my case the elinks
 binary compiled in the very minimalistic configuration
-but when I opene http it does throw Socket Exception.
+but when I opened http it does throw Socket Exception.
 
 First You want to compile the win64 executable using the
 

src/osdep/osdep.c

@@ -77,6 +77,13 @@
 int
 set_nonblocking_fd(int fd)
 {
+#ifdef WIN32
+	/* on current mingw (202204)
+	 * this is correct usage of winsock
+	 * when compiling for win32 */
+	u_long mode = 1; // set non-blocking socket
+	return ioctlsocket(fd, FIONBIO, &mode);
+# else
 #if defined(O_NONBLOCK) || defined(O_NDELAY)
 	int flags = fcntl(fd, F_GETFL, 0);
 
@@ -94,6 +101,8 @@ set_nonblocking_fd(int fd)
 #else
 	return 0;
 #endif
+
+#endif
 }
 
 /* Set a file descriptor to blocking mode. It returns a non-zero value on
@@ -101,6 +110,13 @@ set_nonblocking_fd(int fd)
 int
 set_blocking_fd(int fd)
 {
+#ifdef WIN32
+	/* on current mingw (202204)
+	 * this is correct usage of winsock
+	 * when compiling for win32 */
+	u_long mode = 0; // set blocking socket
+	return ioctlsocket(fd, FIONBIO, &mode);
+# else
 #if defined(O_NONBLOCK) || defined(O_NDELAY)
 	int flags = fcntl(fd, F_GETFL, 0);
 
@@ -118,6 +134,7 @@ set_blocking_fd(int fd)
 #else
 	return 0;
 #endif
+#endif
 }
 
 void