- Sets CMAKE_C_STANDARD to 17
- Disables C extensions (e.g. gnu17) to force ISO C on macOS/Windows
- Fixes language properties in cmake 3.0 not being set correctly
- Sets Xcode attributes to c17
-Wformat-security is enabled, some Linux packages build system have it
enabled.
https://github.com/obsproject/obs-studio/pull/5766
-Wunused-parameter is enabled too.
Also ensure that null conversion (C++ only for GCC) is enabled because its
enablement by default can depend on the CMake generator.
-Wswitch is enabled but it is kept as a warning. It was already enabled
with Clang.
If Clang has -Wshorten-64-to-32 enabled, keep it as warnings.
Status output related to OBS configuration is prefixed with the string
"OBS" and added padding for enabled and disabled features. This padding
was not aligned between platforms.
By moving the padding and prefix decoration into its own function,
both elements are controlled in a single place. CMake scripts were
changed to use this new function `obs_status` instead of using CMake's
`message` function directly.
