Build kwayland deps with kwayland since they should be in sync

external/kwayland/CMakeLists.txt

@@ -18,12 +18,69 @@ endif()
 
 add_library(external_kwayland_bundled STATIC IMPORTED)
 
+include(ExternalProject)
+
+ExternalProject_Add(extra-cmake-modules
+    URL ${third_party_loc}/extra-cmake-modules
+    CMAKE_GENERATOR Ninja
+    CMAKE_ARGS
+        -DCMAKE_BUILD_TYPE=Release
+        -DCMAKE_INSTALL_PREFIX=<BINARY_DIR>
+        -DCMAKE_INSTALL_DATADIR=share
+        -DBUILD_TESTING=OFF
+    BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR>
+    COMMAND ${CMAKE_COMMAND} --install <BINARY_DIR>
+    STEP_TARGETS build
+    EXCLUDE_FROM_ALL TRUE
+    BUILD_BYPRODUCTS <BINARY_DIR>/share/ECM/cmake/ECMConfig.cmake
+)
+
+ExternalProject_Get_property(extra-cmake-modules BINARY_DIR)
+set(extra_cmake_modules_binary_dir ${BINARY_DIR})
+
+ExternalProject_Add(wayland-protocols
+    URL ${third_party_loc}/wayland-protocols
+    CONFIGURE_COMMAND meson
+        --prefix=<BINARY_DIR>
+        --libdir=lib
+        --buildtype=release
+        -Dtests=false
+        <BINARY_DIR> <SOURCE_DIR>
+    BUILD_COMMAND meson compile -C <BINARY_DIR>
+    COMMAND meson install -C <BINARY_DIR>
+    STEP_TARGETS build
+    EXCLUDE_FROM_ALL TRUE
+    BUILD_BYPRODUCTS <BINARY_DIR>/lib/wayland-protocols.pc
+)
+
+ExternalProject_Get_property(wayland-protocols BINARY_DIR)
+set(wayland_protocols_binary_dir ${BINARY_DIR})
+
+ExternalProject_Add(plasma-wayland-protocols
+    URL ${third_party_loc}/plasma-wayland-protocols
+    CMAKE_GENERATOR Ninja
+    CMAKE_ARGS
+        -DCMAKE_BUILD_TYPE=Release
+        -DCMAKE_INSTALL_PREFIX=<BINARY_DIR>
+        -DCMAKE_INSTALL_LIBDIR=lib
+        -DECM_DIR=${extra_cmake_modules_binary_dir}/share/ECM/cmake
+    BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR>
+    COMMAND ${CMAKE_COMMAND} --install <BINARY_DIR>
+    STEP_TARGETS build
+    EXCLUDE_FROM_ALL TRUE
+    BUILD_BYPRODUCTS <BINARY_DIR>/lib/cmake/PlasmaWaylandProtocols/PlasmaWaylandProtocolsConfig.cmake
+)
+
+ExternalProject_Add_StepDependencies(plasma-wayland-protocols configure extra-cmake-modules-build)
+
+ExternalProject_Get_property(plasma-wayland-protocols BINARY_DIR)
+set(plasma_wayland_protocols_binary_dir ${BINARY_DIR})
+
 set(kwayland_patch_command)
 if (DESKTOP_APP_QT6)
     set(kwayland_patch_command PATCH_COMMAND patch -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/kwayland-qt6.patch)
 endif()
 
-include(ExternalProject)
 ExternalProject_Add(kwayland
     URL ${third_party_loc}/kwayland
     CMAKE_GENERATOR Ninja
@@ -31,6 +88,9 @@ ExternalProject_Add(kwayland
         -DCMAKE_BUILD_TYPE=Release
         -DBUILD_SHARED_LIBS=OFF
         -DBUILD_TESTING=OFF
+        -DCMAKE_PREFIX_PATH=${wayland_protocols_binary_dir}
+        -DECM_DIR=${extra_cmake_modules_binary_dir}/share/ECM/cmake
+        -DPlasmaWaylandProtocols_DIR=${plasma_wayland_protocols_binary_dir}/lib/cmake/PlasmaWaylandProtocols
     ${kwayland_patch_command}
     BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR> --target KF5WaylandClient
     STEP_TARGETS build
@@ -38,6 +98,10 @@ ExternalProject_Add(kwayland
     BUILD_BYPRODUCTS <BINARY_DIR>/lib/libKF5WaylandClient.a
 )
 
+ExternalProject_Add_StepDependencies(kwayland configure extra-cmake-modules-build)
+ExternalProject_Add_StepDependencies(kwayland configure wayland-protocols-build)
+ExternalProject_Add_StepDependencies(kwayland configure plasma-wayland-protocols-build)
+
 ExternalProject_Get_property(kwayland SOURCE_DIR)
 ExternalProject_Get_property(kwayland BINARY_DIR)