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SDL/docs/README-riscos.md

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RISC OS

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

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

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.

Current level of implementation

The video driver currently provides full screen video support with keyboard and mouse input. Windowed mode is not yet supported, but is planned in the future. Only software rendering is supported.

The filesystem APIs return either Unix-style paths or RISC OS-style paths based on the value of the __riscosify_control symbol, as is standard for UnixLib functions.

The audio, loadso, thread and timer APIs are currently provided by UnixLib.

The joystick, locale and power APIs are not yet implemented.