obs-studio/cmake/macos/compilerconfig.cmake

# OBS CMake macOS compiler configuration module

# Enable distinction between Clang and AppleClang
if(POLICY CMP0025)
  cmake_policy(SET CMP0025 NEW)
endif()

# Honor visibility presets for all target types (executable, shared, module, static)
if(POLICY CMP0063)
  cmake_policy(SET CMP0063 NEW)
endif()

include(ccache)
include(compiler_common)
include(simd)

# Set C17 / C++17 standards as required and disable extensions
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

set(CMAKE_C_STANDARD 17)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS OFF)

# Set symbols to be hidden by default for C and C++
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_C_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)

# Add default C and C++ compiler options if Xcode generator is not used
if(NOT XCODE)
  list(
    APPEND
    _obs_c_options
    -Werror
    -Wextra
    -Wvla
    -Wswitch
    -Wformat-security
    -Wunused-parameter
    -Wno-unused-function
    -Wno-missing-field-initializers
    -Wformat
    -fno-strict-aliasing
    -Wno-error=shorten-64-to-32)

  # Enable stripping of dead symbols when not building for Debug configuration
  set(_release_configs RelWithDebInfo Release MinSizeRel)
  if(CMAKE_BUILD_TYPE IN_LIST _release_configs)
    add_link_options(LINKER:-dead_strip)
  endif()

  add_compile_options("$<$<COMPILE_LANGUAGE:C>:${_obs_c_options}>" "$<$<COMPILE_LANGUAGE:CXX>:${_obs_c_options}>"
                      "$<$<AND:$<COMPILE_LANGUAGE:Swift>,$<CONFIG:DEBUG>>:-Onone>")

  option(ENABLE_COMPILER_TRACE "Enable clang time-trace (requires Ninja)" OFF)
  mark_as_advanced(ENABLE_COMPILER_TRACE)

  # Add time trace option to compiler, if enabled.
  if(ENABLE_COMPILER_TRACE AND CMAKE_GENERATOR STREQUAL "Ninja")
    add_compile_options($<$<COMPILE_LANGUAGE:C>:-ftime-trace> $<$<COMPILE_LANGUAGE:CXX>:-ftime-trace>)
  else()
    set(ENABLE_COMPILER_TRACE
        OFF
        CACHE STRING "Enable clang time-trace (requires Ninja)" FORCE)
  endif()

  # Enable color diagnostics for AppleClang
  set(CMAKE_COLOR_DIAGNOSTICS ON)
endif()

add_compile_definitions("$<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<CONFIG:DEBUG>>:DEBUG;_DEBUG>")