Index: Doxyfile
==================================================================
--- Doxyfile
+++ Doxyfile
@@ -1,14 +1,15 @@
 PROJECT_NAME = "ObjFW"
 OUTPUT_DIRECTORY = docs/
-INPUT = src src/exceptions
+INPUT = src src/exceptions src/runtime
 FILE_PATTERNS = *.h *.m
 HTML_OUTPUT = .
 GENERATE_LATEX = NO
 HIDE_UNDOC_CLASSES = YES
 HIDE_UNDOC_MEMBERS = YES
-PREDEFINED = DOXYGEN				\
+PREDEFINED = __OBJC__				\
+	     DOXYGEN				\
 	     OF_BOXABLE				\
 	     OF_CONSUMED			\
 	     OF_DESIGNATED_INITIALIZER		\
 	     OF_GENERIC(...)=			\
 	     OF_HAVE_BLOCKS			\

Index: README.md
==================================================================
--- README.md
+++ README.md
@@ -5,51 +5,48 @@
 want to be portable.
 
 See https://objfw.nil.im/ for more information.
 
 
-Table of Contents
-=================
+<h1 id="table-of-contents">Table of Contents</h1>
 
  * [Installation](#installation)
    * [macOS and iOS](#macos-and-ios)
-     * [Building as a framework](#building-as-a-framework)
-     * [Using the macOS or iOS framework in Xcode](#using-the-macos-or-ios-framework-in-xcode)
+     * [Building as a framework](#building-framework)
+     * [Using the macOS or iOS framework in Xcode](#framework-in-xcode)
      * [Broken Xcode versions](#broken-xcode-versions)
    * [Windows](#windows)
      * [Getting MSYS2](#getting-msys2)
      * [Updating MSYS2](#updating-msys2)
-     * [Installing MinGW-w64 using MSYS2](#installing-mingw-w64-using-msys2)
-     * [Getting, building and installing ObjFW](#getting-building-and-installing-objfw)
-   * [Nintendo DS, Nintendo 3DS and Wii](#nintendo-ds-nintendo-3ds-and-wii)
+     * [Installing MinGW-w64 using MSYS2](#installing-mingw-w64)
+     * [Getting, building and installing ObjFW](#steps-windows)
+   * [Nintendo DS, Nintendo 3DS and Wii](#nintendo)
      * [Nintendo DS](#nintendo-ds)
      * [Nintendo 3DS](#nintendo-3ds)
      * [Wii](#wii)
    * [Amiga](#amiga)
- * [Writing your first application with ObjFW](#writing-your-first-application-with-objfw)
- * [Bugs and feature requests](#bugs-and-feature-requests)
+ * [Writing your first application with ObjFW](#first-app)
+ * [Bugs and feature requests](#bugs)
  * [Commercial use](#commercial-use)
 
 
-Installation
-============
+<h1 id="installation">Installation</h1>
 
   To install ObjFW, just run the following commands:
 
     $ ./configure
     $ make
     $ make install
 
-  In case you checked out ObjFW from the Git repository, you need to run the
-  following command first:
+  In case you checked out ObjFW from the Fossil or Git repository, you need to
+  run the following command first:
 
     $ ./autogen.sh
 
-macOS and iOS
--------------
+<h2 id="macos-and-ios">macOS and iOS</h2>
 
-### Building as a framework
+<h3 id="building-framework">Building as a framework</h3>
 
   When building for macOS or iOS, everything is built as a `.framework` by
   default if `--disable-shared` has not been specified to `configure`.
 
   To build for iOS, use something like this:
@@ -66,18 +63,18 @@
     $ export OBJC="$clang -arch i386 -arch x86_64"
     $ export OBJCPP="$clang -arch i386 -E"
     $ export IPHONEOS_DEPLOYMENT_TARGET="9.0"
     $ ./configure --prefix=/usr/local/iossim --host=i386-apple-darwin
 
-### Using the macOS or iOS framework in Xcode
+<h3 id="framework-in-xcode">Using the macOS or iOS framework in Xcode</h3>
 
   To use the macOS framework in Xcode, you need to add the `.framework`s to
   your project and add the following flags to `Other C Flags`:
 
     -fconstant-string-class=OFConstantString -fno-constant-cfstrings
 
-### Broken Xcode versions
+<h3 id="broken-xcode-versions">Broken Xcode versions</h3>
 
   Some versions of Xcode shipped with a version of Clang that ignores
   `-fconstant-string-class=OFConstantString`. This will manifest in an error
   like this:
 
@@ -96,30 +93,30 @@
 
   You can get older versions of Xcode
   [here](https://developer.apple.com/download) by clicking on "More" in the
   top-right corner.
 
-Windows
--------
+<h2 id='windows'>Windows</h2>
 
   Windows is only officially supported when following these instructions, as
   there are many MinGW versions that behave slightly differently and often
   cause problems.
 
-### Getting MSYS2
+<h3 id="getting-msys2">Getting MSYS2</h3>
 
   The first thing to install is [MSYS2](https://www.msys2.org) to provide a
   basic UNIX-like environment for Windows. Unfortunately, the binaries are not
   signed and there is no way to verify their integrity, so only download this
   from a trusted connection. Everything else you will download using MSYS2
   later will be cryptographically signed.
 
-### Updating MSYS2
+<h3 id="updating-msys2">Updating MSYS2</h3>
 
   The first thing to do is updating MSYS2. It is important to update things in
   a certain order, as `pacman` (the package manager MSYS2 uses, which comes
-  from ArchLinux) does not know about a few things that are special on Windows.
+  from Arch Linux) does not know about a few things that are special on
+  Windows.
 
   First, update the mirror list:
 
     $ pacman -Sy pacman-mirrors
 
@@ -134,11 +131,11 @@
 
   Now you have a fully updated MSYS2. Whenever you want to update MSYS2,
   proceed in this order. Notice that the first `pacman` invocation includes
   `-y` to actually fetch a new list of packages.
 
-### Installing MinGW-w64 using MSYS2
+<h3 id="installing-mingw-w64">Installing MinGW-w64 using MSYS2</h3>
 
   Now it's time to install MinGW-w64. If you want to build 32 bit binaries:
 
     $ pacman -S mingw-w64-i686-clang mingw-w64-i686-gcc-objc
 
@@ -151,62 +148,61 @@
   Shell`. So if you want to build for 32 or 64 bit, you just start the correct
   shell.
 
   Finally, install a few more things needed to build ObjFW:
 
-    $ pacman -S autoconf automake git make
+    $ pacman -S autoconf automake fossil make
 
-### Getting, building and installing ObjFW
+<h3 id="steps-windows">Getting, building and installing ObjFW</h3>
 
   Start the MinGW-w64 Win32 or Win64 Shell (depening on what version you want
   to build - do *not* use the MSYS2 Shell shortcut, but use the MinGW-w64 Win32
   or Win64 Shell shortcut instead!) and check out ObjFW:
 
-    $ git clone https://git.nil.im/objfw.git
+    $ fossil clone https://objfw.nil.im objfw.fossil
+    $ mkdir objfw && cd objfw
+    $ fossil open ../objfw.fossil
 
   You can also download a release tarball if you want. Now go to the newly
   checked out repository and build and install it:
 
     $ ./autogen.sh && ./configure && make -j16 install
 
   If everything was successfully, you can now build projects using ObjFW for
   Windows using the normal `objfw-compile` and friends.
 
-Nintendo DS, Nintendo 3DS and Wii
----------------------------------
+<h2 id="nintendo">Nintendo DS, Nintendo 3DS and Wii</h2>
 
   Download and install [devkitPro](https://devkitpro.org/wiki/Getting_Started).
 
-### Nintendo DS
+<h3 id="nintendo-ds">Nintendo DS</h3>
 
   Follow the normal process, but instead of `./configure` run:
 
     $ ./configure --host=arm-none-eabi --with-nds
 
-### Nintendo 3DS
+<h3 id="nintendo-3ds">Nintendo 3DS</h3>
 
   Follow the normal process, but instead of `./configure` run:
 
     $ ./configure --host=arm-none-eabi --with-3ds
 
-### Wii
+<h3 id="wii">Wii</h3>
 
   Follow the normal process, but instead of `./configure` run:
 
     $ ./configure --host=powerpc-eabi --with-wii
 
-Amiga
------
+<h2 id="amiga">Amiga</h2>
 
   Install [amiga-gcc](https://github.com/bebbo/amiga-gcc). Then follow the
   normal process, but instead of `./configure` run:
 
     $ ./configure --host=m68k-amigaos
 
 
-Writing your first application with ObjFW
-=========================================
+<h1 id="first-app">Writing your first application with ObjFW</h1>
 
   To create your first, empty application, you can use `objfw-new`:
 
     $ objfw-new app MyFirstApp
 
@@ -224,19 +220,17 @@
   `objfw-compile` is a tool that allows building applications and libraries
   using ObjFW without needing a full-blown build system. If you want to use
   your own build system, you can get the necessary flags from `objfw-config`.
 
 
-Bugs and feature requests
-=========================
+<h1 id="bugs">Bugs and feature requests</h1>
 
   If you find any bugs or have feature requests, feel free to send a mail to
   js@nil.im!
 
 
-Commercial use
-==============
+<h1 id="commercial-use">Commercial use</h1>
 
   If for whatever reason neither the terms of the QPL nor those of the GPL work
   for you, a proprietary license for ObjFW including support is available upon
   request. Just write a mail to js@nil.im and we can find a reasonable solution
   for both parties.

Index: src/OFSPXSocket.h
==================================================================
--- src/OFSPXSocket.h
+++ src/OFSPXSocket.h
@@ -16,12 +16,10 @@
  */
 
 #import "OFSequencedPacketSocket.h"
 #import "OFRunLoop.h"
 
-#import "socket.h"
-
 OF_ASSUME_NONNULL_BEGIN
 
 /*! @file */
 
 @class OFSPXSocket;

Index: src/OFSPXStreamSocket.h
==================================================================
--- src/OFSPXStreamSocket.h
+++ src/OFSPXStreamSocket.h
@@ -16,12 +16,10 @@
  */
 
 #import "OFStreamSocket.h"
 #import "OFRunLoop.h"
 
-#import "socket.h"
-
 OF_ASSUME_NONNULL_BEGIN
 
 /*! @file */
 
 @class OFSPXStreamSocket;

Index: src/OFTCPSocket.h
==================================================================
--- src/OFTCPSocket.h
+++ src/OFTCPSocket.h
@@ -16,12 +16,10 @@
  */
 
 #import "OFStreamSocket.h"
 #import "OFRunLoop.h"
 
-#import "socket.h"
-
 OF_ASSUME_NONNULL_BEGIN
 
 /*! @file */
 
 @class OFTCPSocket;

Index: src/runtime/ObjFWRT.h
==================================================================
--- src/runtime/ObjFWRT.h
+++ src/runtime/ObjFWRT.h
@@ -51,35 +51,125 @@
 
 #if !__has_feature(objc_arc) && !defined(__unsafe_unretained)
 # define __unsafe_unretained
 #endif
 
+/*!
+ * @brief A value representing no class.
+ */
 #define Nil (Class _Null_unspecified)0
+
+/*!
+ * @brief A value representing no object.
+ */
 #define nil (id _Null_unspecified)0
+
+/*!
+ * @brief An Objective-C boolean representing true.
+ *
+ * @note This is a legacy from before C had a boolean type. Prefer the standard
+ *	 C99 true instead!
+ */
 #define YES true
-#define NO  false
+
+/*!
+ * @brief An Objective-C boolean representing false.
+ *
+ * @note This is a legacy from before C had a boolean type. Prefer the standard
+ *	 C99 false instead!
+ */
+#define NO false
+
+/*! @file */
 
+/*!
+ * @brief A pointer to a class.
+ */
 typedef struct objc_class *Class;
+
+/*!
+ * @brief A pointer to any object.
+ */
 typedef struct objc_object *id;
+
+/*!
+ * @brief A selector.
+ *
+ * A selector is the name of a method including the colons and an optional type
+ * encoding.
+ */
 typedef const struct objc_selector *SEL;
+
+/*!
+ * @brief A method.
+ *
+ * A method consists of a selector with a type encoding and an implementation.
+ */
 typedef const struct objc_method *Method;
-#ifdef __OBJC__
+
+/*!
+ * @brief A protocol.
+ */
+#if defined(__OBJC__) && !defined(DOXYGEN)
 @class Protocol;
 #else
 typedef const struct objc_protocol *Protocol;
 #endif
+
+/*!
+ * @brief An instance variable.
+ */
 typedef const struct objc_ivar *Ivar;
+
+/*!
+ * @brief A property.
+ */
 typedef const struct objc_property *objc_property_t;
+
 #if !defined(__wii__) && !defined(__amigaos__)
+/*!
+ * @brief An Objective-C boolean. Either @ref YES or @ref NO.
+ *
+ * @note This is a legacy from before C had a boolean type. Prefer the standard
+ *	 C99 bool instead!
+ */
 typedef bool BOOL;
 #endif
-typedef id _Nullable (*IMP)(id _Nonnull, SEL _Nonnull, ...);
-typedef void (*objc_uncaught_exception_handler_t)(id _Nullable);
-typedef void (*objc_enumeration_mutation_handler_t)(id _Nonnull);
+
+/*!
+ * @brief A method implemenation.
+ *
+ * @param object The messaged object
+ * @param selector The selector sent
+ */
+typedef id _Nullable (*IMP)(id _Nonnull object, SEL _Nonnull selector, ...);
+
+/*!
+ * @brief A handler for uncaught exceptions.
+ *
+ * @param exception The exception which was not caught.
+ */
+typedef void (*objc_uncaught_exception_handler_t)(id _Nullable exception);
+
+/*!
+ * @brief A handler for mutation during enumeration.
+ *
+ * @param object The object that was mutated during enumeration
+ */
+typedef void (*objc_enumeration_mutation_handler_t)(id _Nonnull object);
 
+/*!
+ * @brief A struct representing a call to super.
+ */
 struct objc_super {
+	/*!
+	 * @brief The object on which to perform the super call.
+	 */
 	id __unsafe_unretained _Nullable self;
+	/*!
+	 * @brief The class from which to take the method.
+	 */
 #ifdef __cplusplus
 	Class _Nonnull class_;
 #else
 	Class _Nonnull class;
 #endif

Index: tests/TestsAppDelegate.m
==================================================================
--- tests/TestsAppDelegate.m
+++ tests/TestsAppDelegate.m
@@ -45,11 +45,14 @@
 # include <nds.h>
 # undef asm
 #endif
 
 #ifdef OF_NINTENDO_3DS
+/* Newer versions of libctru started using id as a parameter name. */
+# define id id_3ds
 # include <3ds.h>
+# undef id
 #endif
 
 #ifdef OF_PSP
 static int
 exit_cb(int arg1, int arg2, void *arg)