docs: remove references to configure build systems from documentation

INSTALL.txt

@@ -6,16 +6,16 @@ To compile and install SDL:
 
         Windows with gcc, either native or cross-compiling:
         * Read the FAQ at https://wiki.libsdl.org/FAQWindows
-        * Run './configure; make; make install'
+        * Run 'cmake -S . -B build && cmake --build build && cmake --install install'
 
         macOS with Xcode:
         * Read docs/README-macosx.md
 
         macOS from the command line:
-        * Run './configure; make; make install'
+        * Run 'cmake -S . -B build && cmake --build build && cmake --install install'
 
         Linux and other UNIX systems:
-        * Run './configure; make; make install'
+        * Run 'cmake -S . -B build && cmake --build build && cmake --install install'
 
         Android:
         * Read docs/README-android.md

docs/README-emscripten.md

@@ -46,7 +46,7 @@ Build:
 
     $ mkdir build
     $ cd build
-    $ emconfigure ../configure --host=asmjs-unknown-emscripten --disable-assembly --disable-threads --disable-cpuinfo CFLAGS="-O2"
+    $ emcmake cmake ..
     $ emmake make
 
 Or with cmake:
@@ -67,10 +67,10 @@ Some other SDL3 libraries can be easily built (assuming SDL3 is installed somewh
 
 SDL_mixer (http://www.libsdl.org/projects/SDL_mixer/):
 
-    $ EMCONFIGURE_JS=1 emconfigure ../configure
+    $ emcmake cmake ..
     build as usual...
 
 SDL_gfx (http://cms.ferzkopp.net/index.php/software/13-sdl-gfx):
 
-    $ EMCONFIGURE_JS=1 emconfigure ../configure --disable-mmx
+    $ emcmake cmake ..
     build as usual...

docs/README-linux.md

@@ -14,7 +14,7 @@ Build Dependencies
 
 Ubuntu 18.04, all available features enabled:
 
-    sudo apt-get install build-essential git make autoconf automake libtool \
+    sudo apt-get install build-essential git make \
     pkg-config cmake ninja-build gnome-desktop-testing libasound2-dev libpulse-dev \
     libaudio-dev libjack-dev libsndio-dev libsamplerate0-dev libx11-dev libxext-dev \
     libxrandr-dev libxcursor-dev libxfixes-dev libxi-dev libxss-dev libwayland-dev \
@@ -25,7 +25,7 @@ Ubuntu 22.04+ can also add `libpipewire-0.3-dev libdecor-0-dev` to that command
 
 Fedora 35, all available features enabled:
 
-    sudo yum install gcc git-core make cmake autoconf automake libtool \
+    sudo yum install gcc git-core make cmake \
     alsa-lib-devel pulseaudio-libs-devel nas-devel pipewire-devel \
     libX11-devel libXext-devel libXrandr-devel libXcursor-devel libXfixes-devel \
     libXi-devel libXScrnSaver-devel dbus-devel ibus-devel fcitx-devel \

docs/README-macos.md

@@ -9,25 +9,14 @@ command line tools or Apple's IDE Xcode.
 
 # Command Line Build
 
-To build SDL using the command line, use the standard configure and make
-process:
+To build SDL using the command line, use the CMake build script:
 
 ```bash
 mkdir build
 cd build
-../configure
-make
-sudo make install
-```
-
-CMake is also known to work, although it continues to be a work in progress:
-
-```bash
-mkdir build
-cd build
-cmake -DCMAKE_BUILD_TYPE=Release ..
-make
-sudo make install
+cmake ..
+cmake --build .
+sudo cmake --install .
 ```
 
 
@@ -38,9 +27,9 @@ script.
 ```bash
 mkdir build
 cd build
-CC=$PWD/../build-scripts/clang-fat.sh ../configure
-make
-sudo make install
+cmake .. "-DCMAKE_OSX_ARCHITECTURES=arm64;x86_64"
+cmake --build .
+sudo cmake --install .
 ```
 
 This script builds SDL with 10.9 ABI compatibility on 64-bit Intel and 11.0
@@ -93,7 +82,7 @@ NSApplicationDelegate implementation:
 
 # Using the Simple DirectMedia Layer with a traditional Makefile
 
-An existing autoconf/automake build system for your SDL app has good chances
+An existing CMake build system for your SDL app has good chances
 to work almost unchanged on macOS. However, to produce a "real" Mac binary
 that you can distribute to users, you need to put the generated binary into a
 so called "bundle", which is basically a fancy folder with a name like

docs/README-porting.md

@@ -11,14 +11,14 @@ on based on C preprocessor symbols.
 
 There are two basic ways of building SDL at the moment:
 
-1. The "UNIX" way:  ./configure; make; make install
+1. CMake:  cmake -S . -B build && cmake --build build && cmake --install install
 
-   If you have a GNUish system, then you might try this.  Edit configure.ac,
+   If you have a GNUish system, then you might try this.  Edit CMakeLists.txt,
    take a look at the large section labelled:
 
-	"Set up the configuration based on the host platform!"
+	"Platform-specific options and settings!"
 
-   Add a section for your platform, and then re-run autogen.sh and build!
+   Add a section for your platform, and then re-run 'cmake -S . -B build' and build!
 
 2. Using an IDE:
 

docs/README-riscos.md

@@ -12,19 +12,13 @@ Requirements:
 Compiling:
 ----------
 
-Currently, SDL for RISC OS only supports compiling with GCCSDK under Linux. Both the autoconf and CMake build systems are supported.
-
-The following commands can be used to build SDL for RISC OS using autoconf:
-
-    ./configure --host=arm-unknown-riscos --prefix=$GCCSDK_INSTALL_ENV
-    make
-    make install
+Currently, SDL for RISC OS only supports compiling with GCCSDK under Linux.
 
 The following commands can be used to build SDL for RISC OS using CMake:
 
     cmake -Bbuild-riscos -DCMAKE_TOOLCHAIN_FILE=$GCCSDK_INSTALL_ENV/toolchain-riscos.cmake -DRISCOS=ON -DCMAKE_INSTALL_PREFIX=$GCCSDK_INSTALL_ENV -DCMAKE_BUILD_TYPE=Release
     cmake --build build-riscos
-    cmake --build build-riscos --target install
+    cmake --install build-riscos
 
 When using GCCSDK 4.7.4 release 6 or earlier versions, the builtin atomic functions are broken, meaning it's currently necessary to compile with `--disable-gcc-atomics` using autotools or `-DSDL_GCC_ATOMICS=OFF` using CMake. Newer versions of GCCSDK don't have this problem.