Complete mbed_retarget FileHandle rework

platform/FileHandle.cpp

@@ -33,9 +33,4 @@ off_t FileHandle::size()
     return size;
 }
 
-std::FILE *fdopen(FileHandle *fh, const char *mode)
-{
-    return mbed_fdopen(fh, mode);
-}
-
 } // namespace mbed

platform/FileHandle.h

@@ -252,18 +252,6 @@ class FileHandle : private NonCopyable<FileHandle> {
     }
 };
 
-/** Not a member function
- *  This call is equivalent to posix fdopen().
- *  It associates a Stream to an already opened file descriptor (FileHandle)
- *
- *  @param fh       a pointer to an opened file descriptor
- *  @param mode     operation upon the file descriptor, e.g., 'wb+'
- *
- *  @returns        a pointer to std::FILE
-*/
-
-std::FILE *fdopen(FileHandle *fh, const char *mode);
-
 /**@}*/
 
 /**@}*/

platform/mbed_lib.json

@@ -2,7 +2,17 @@
     "name": "platform",
     "config": {
         "stdio-convert-newlines": {
-            "help": "Enable conversion to standard newlines on stdin/stdout",
+            "help": "Enable conversion to standard newlines on stdin/stdout/stderr",
+            "value": false
+        },
+
+        "stdio-convert-tty-newlines": {
+            "help": "Enable conversion to standard newlines on any tty FILE stream",
+            "value": false
+        },
+
+        "stdio-buffered-serial": {
+            "help": "Use UARTSerial driver to obtain buffered serial I/O on stdin/stdout/stderr. If false, unbuffered serial_getc and serial_putc are used directly.",
             "value": false
         },