cmake: Replace find_qt with find_package

.cmake-format.json

@@ -6,15 +6,6 @@
     "autosort": true
   },
   "additional_commands": {
-    "find_qt": {
-      "flags": [],
-      "kwargs": {
-        "COMPONENTS": "+",
-        "COMPONENTS_WIN": "+",
-        "COMPONENTS_MACOS": "+",
-        "COMPONENTS_LINUX": "+"
-      }
-    },
     "set_target_properties_obs": {
       "pargs": 1,
       "flags": [],

.github/workflows/build-debian.yml

@@ -42,8 +42,9 @@ jobs:
         run: |
           # devscripts and libobs-dev are needed but they were already installed
           # from check_libobs_revision and install_frontend_header sections.
+          sudo add-apt-repository universe
           sudo apt update
-          sudo apt install cmake debhelper libcurl4-openssl-dev libxss-dev libxtst-dev qtbase5-dev libopencv-dev libprocps-dev
+          sudo apt install cmake debhelper libcurl4-openssl-dev libxss-dev libxtst-dev qt6-base-dev libopencv-dev libprocps-dev
       - name: build
         run: |
           debuild --no-lintian --no-sign

CMakeLists.txt

@@ -287,9 +287,9 @@ include(cmake/common/advss_helpers.cmake)
 setup_obs_lib_dependency(${LIB_NAME})
 setup_obs_lib_dependency(${PROJECT_NAME})
 
-find_qt(COMPONENTS Widgets Core)
-target_link_libraries(${PROJECT_NAME} PRIVATE Qt::Core Qt::Widgets)
-target_link_libraries(${LIB_NAME} PRIVATE Qt::Core Qt::Widgets)
+find_package(Qt6 REQUIRED COMPONENTS Widgets Core)
+target_link_libraries(${PROJECT_NAME} PRIVATE Qt6::Core Qt6::Widgets)
+target_link_libraries(${LIB_NAME} PRIVATE Qt6::Core Qt6::Widgets)
 target_compile_options(
   ${PROJECT_NAME}
   PRIVATE

build-aux/CI/linux/debian/control

@@ -7,7 +7,7 @@ Build-Depends: cmake,
                libcurl4-openssl-dev,
                libobs-dev,
                libxtst-dev,
-               qtbase5-dev,
+               qt6-base-dev,
                libxss-dev,
                libopencv-dev
 Standards-Version: 4.6.0

cmake/common/advss_helpers.cmake

@@ -283,8 +283,8 @@ endfunction()
 
 function(setup_advss_plugin target)
   setup_obs_lib_dependency(${target})
-  find_qt(COMPONENTS Widgets Core)
-  target_link_libraries(${target} PRIVATE Qt::Core Qt::Widgets)
+  find_package(Qt6 REQUIRED COMPONENTS Widgets Core)
+  target_link_libraries(${target} PRIVATE Qt6::Core Qt6::Widgets)
 
   set_target_properties(
     ${target}

cmake/common/helpers_common.cmake

@@ -17,85 +17,6 @@ if(NOT QT_VERSION)
   set_property(CACHE QT_VERSION PROPERTY STRINGS AUTO 5 6)
 endif()
 
-# find_qt: Macro to find best possible Qt version for use with the project:
-macro(find_qt)
-  set(multiValueArgs COMPONENTS COMPONENTS_WIN COMPONENTS_MAC COMPONENTS_LINUX)
-  cmake_parse_arguments(find_qt "" "${oneValueArgs}" "${multiValueArgs}"
-                        ${ARGN})
-
-  # Do not use versionless targets in the first step to avoid Qt::Core being
-  # clobbered by later opportunistic find_package runs
-  set(QT_NO_CREATE_VERSIONLESS_TARGETS TRUE)
-
-  message(DEBUG "Start Qt version discovery...")
-  # Loop until _QT_VERSION is set or FATAL_ERROR aborts script execution early
-  while(NOT _QT_VERSION)
-    message(DEBUG "QT_VERSION set to ${QT_VERSION}")
-    if(QT_VERSION STREQUAL AUTO AND NOT qt_test_version)
-      set(qt_test_version 6)
-    elseif(NOT QT_VERSION STREQUAL AUTO)
-      set(qt_test_version ${QT_VERSION})
-    endif()
-    message(DEBUG "Attempting to find Qt${qt_test_version}")
-
-    find_package(
-      Qt${qt_test_version}
-      COMPONENTS Core
-      QUIET)
-
-    if(TARGET Qt${qt_test_version}::Core)
-      set(_QT_VERSION
-          ${qt_test_version}
-          CACHE INTERNAL "")
-      message(STATUS "Qt version found: ${_QT_VERSION}")
-      unset(qt_test_version)
-      break()
-    elseif(QT_VERSION STREQUAL AUTO)
-      if(qt_test_version EQUAL 6)
-        message(WARNING "Qt6 was not found, falling back to Qt5")
-        set(qt_test_version 5)
-        continue()
-      endif()
-    endif()
-    message(FATAL_ERROR "Neither Qt6 nor Qt5 found.")
-  endwhile()
-
-  # Enable versionless targets for the remaining Qt components
-  set(QT_NO_CREATE_VERSIONLESS_TARGETS FALSE)
-
-  set(qt_components ${find_qt_COMPONENTS})
-  if(OS_WINDOWS)
-    list(APPEND qt_components ${find_qt_COMPONENTS_WIN})
-  elseif(OS_MACOS)
-    list(APPEND qt_components ${find_qt_COMPONENTS_MAC})
-  else()
-    list(APPEND qt_components ${find_qt_COMPONENTS_LINUX})
-  endif()
-  message(DEBUG "Trying to find Qt components ${qt_components}...")
-
-  find_package(Qt${_QT_VERSION} REQUIRED ${qt_components})
-
-  list(APPEND qt_components Core)
-
-  if("Gui" IN_LIST find_qt_COMPONENTS_LINUX)
-    list(APPEND qt_components "GuiPrivate")
-  endif()
-
-  # Check for versionless targets of each requested component and create if
-  # necessary
-  foreach(component IN LISTS qt_components)
-    message(DEBUG "Checking for target Qt::${component}")
-    if(NOT TARGET Qt::${component} AND TARGET Qt${_QT_VERSION}::${component})
-      add_library(Qt::${component} INTERFACE IMPORTED)
-      set_target_properties(
-        Qt::${component} PROPERTIES INTERFACE_LINK_LIBRARIES
-                                    Qt${_QT_VERSION}::${component})
-    endif()
-    set_property(TARGET Qt::${component} PROPERTY INTERFACE_COMPILE_FEATURES "")
-  endforeach()
-
-endmacro()
-
 # check_uuid: Helper function to check for valid UUID
 function(check_uuid uuid_string return_value)
   set(valid_uuid TRUE)