obs-studio/libobs/cmake/os-linux.cmake

find_package(LibUUID REQUIRED)
find_package(X11 REQUIRED)
find_package(X11_XCB REQUIRED)
find_package(XCB REQUIRED XCB OPTIONAL_COMPONENTS XINPUT)
find_package(Gio)

target_sources(
  libobs
  PRIVATE
    obs-nix-platform.c
    obs-nix-platform.h
    obs-nix-x11.c
    obs-nix.c
    util/pipe-posix.c
    util/platform-nix.c
    util/threading-posix.c
    util/threading-posix.h
)

target_compile_definitions(
  libobs
  PRIVATE
    OBS_INSTALL_PREFIX="${OBS_INSTALL_PREFIX}"
    $<$<COMPILE_LANG_AND_ID:C,GNU>:ENABLE_DARRAY_TYPE_TEST>
    $<$<COMPILE_LANG_AND_ID:CXX,GNU>:ENABLE_DARRAY_TYPE_TEST>
)

if(CMAKE_C_COMPILER_ID STREQUAL GNU)
  # * Silence type-limits warning in line 292 of libobs/utils/utf8.c
  if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 12.3.0)
    target_compile_options(libobs PRIVATE -Wno-error=type-limits)
  endif()
endif()

set(CMAKE_M_LIBS "")
include(CheckCSourceCompiles)
set(LIBM_TEST_SOURCE "#include<math.h>\nfloat f; int main(){sqrt(f);return 0;}")
check_c_source_compiles("${LIBM_TEST_SOURCE}" HAVE_MATH_IN_STD_LIB)

set(UUID_TEST_SOURCE "#include<uuid/uuid.h>\nint main(){return 0;}")
check_c_source_compiles("${UUID_TEST_SOURCE}" HAVE_UUID_HEADER)

if(NOT HAVE_UUID_HEADER)
  message(FATAL_ERROR "Required system header <uuid/uuid.h> not found.")
endif()

target_link_libraries(
  libobs
  PRIVATE
    X11::X11
    X11::XCB
    XCB::XCB
    LibUUID::LibUUID
    ${CMAKE_DL_LIBS}
    $<$<NOT:$<BOOL:${HAVE_MATH_IN_STD_LIB}>>:m>
    $<$<TARGET_EXISTS:XCB::XINPUT>:XCB::XINPUT>
)

if(ENABLE_PULSEAUDIO)
  find_package(PulseAudio REQUIRED)

  target_sources(
    libobs
    PRIVATE
      audio-monitoring/pulse/pulseaudio-enum-devices.c
      audio-monitoring/pulse/pulseaudio-monitoring-available.c
      audio-monitoring/pulse/pulseaudio-output.c
      audio-monitoring/pulse/pulseaudio-wrapper.c
      audio-monitoring/pulse/pulseaudio-wrapper.h
  )

  target_link_libraries(libobs PRIVATE PulseAudio::PulseAudio)
  target_enable_feature(libobs "PulseAudio audio monitoring (Linux)")
else()
  target_sources(libobs PRIVATE audio-monitoring/null/null-audio-monitoring.c)
  target_disable_feature(libobs "PulseAudio audio monitoring (Linux)")
endif()

if(TARGET gio::gio)
  target_sources(libobs PRIVATE util/platform-nix-dbus.c util/platform-nix-portal.c)
  target_link_libraries(libobs PRIVATE gio::gio)
endif()

if(ENABLE_WAYLAND)
  find_package(Wayland REQUIRED Client)
  find_package(Xkbcommon REQUIRED)

  target_sources(libobs PRIVATE obs-nix-wayland.c)
  target_link_libraries(libobs PRIVATE Wayland::Client xkbcommon::xkbcommon)
  target_enable_feature(libobs "Wayland compositor support (Linux)")
else()
  target_disable_feature(libobs "Wayland compositor support (Linux)")
endif()

set_target_properties(libobs PROPERTIES OUTPUT_NAME obs)