cmake: Use Extra CMake Modules on Linux

.cirrus.yml

@@ -10,7 +10,7 @@ env:
 task:
   install_script:
   - pkg install -y
-    cmake ninja binutils pkgconf curl
+    cmake ninja binutils pkgconf curl kf6-extra-cmake-modules
     ffmpeg qt6-base qt6-svg jansson libsysinfo e2fsprogs-libuuid pulseaudio
     alsa-lib pipewire v4l_compat libpci librist srt nlohmann-json uthash
     qr-code-generator websocketpp asio vlc swig luajit jackit sndio fdk-aac

.github/scripts/utils.zsh/setup_ubuntu

@@ -60,7 +60,7 @@ log_group 'Installing obs-studio build dependencies from apt...'
 
 sudo apt-get install -y --no-install-recommends \
   build-essential libglib2.0-dev \
-  lsb-release dh-cmake \
+  extra-cmake-modules lsb-release dh-cmake \
   libcurl4-openssl-dev \
   libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev \
   libswresample-dev libswscale-dev \

cmake/linux/defaults.cmake

@@ -40,3 +40,4 @@ set(OBS_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
 set(CMAKE_FIND_PACKAGE_TARGETS_GLOBAL TRUE)
 
 include(cpackconfig)
+include(ecmconfig)

cmake/linux/ecmconfig.cmake

@@ -0,0 +1,7 @@
+# OBS CMake Linux Extra CMake Module configuration module
+
+include_guard(GLOBAL)
+
+find_package(ECM REQUIRED NO_MODULE)
+
+list(APPEND CMAKE_MODULE_PATH ${ECM_MODULE_PATH})