Use FetchContent feature of CMake to include openxr dependency instead of the old way.

CI/before_script.msvc.sh

@@ -77,7 +77,6 @@ BULLET_DOUBLE=""
 BULLET_DBL=""
 BULLET_DBL_DISPLAY="Single precision"
 SKIP_VR=""
-OPENXR_INSTALL_ROOT=""
 
 ACTIVATE_MSVC=""
 SINGLE_CONFIG=""
@@ -516,16 +515,6 @@ if [ -z $SKIP_DOWNLOAD ]; then
 			git clone -b release-1.10.0 https://github.com/google/googletest.git
 		fi
 	fi
-    
-    # OpenXR
-    if [ -z $SKIP_VR]; then
-		echo "OpenXR SDK 1.0.9..."
-		if [ -d OpenXR-SDK ]; then
-			printf "OpenXR SDK exists, skipping."
-		else
-			git clone -b release-1.0.9 https://github.com/KhronosGroup/OpenXR-SDK.git
-		fi
-    fi
 fi
 
 cd .. #/..
@@ -834,12 +823,6 @@ printf "SDL 2.0.12... "
 cd $DEPS
 echo
 
-if [ $CONFIGURATION == "Debug" ]; then
-        DEBUG_SUFFIX="d"
-    else
-        DEBUG_SUFFIX=""
-fi
-
 # Google Test and Google Mock
 if [ ! -z $TEST_FRAMEWORK ]; then
 	printf "Google test 1.10.0 ..."
@@ -852,6 +835,11 @@ if [ ! -z $TEST_FRAMEWORK ]; then
 	cd build
 
 	GOOGLE_INSTALL_ROOT="${DEPS_INSTALL}/GoogleTest"
+	if [ $CONFIGURATION == "Debug" ]; then
+			DEBUG_SUFFIX="d"
+		else
+			DEBUG_SUFFIX=""
+	fi
 
 	if [ ! -d $GOOGLE_INSTALL_ROOT ]; then
 
@@ -879,29 +867,9 @@ if [ ! -z $TEST_FRAMEWORK ]; then
 
 fi
 
-# OpenXR SDK
+# VR build
-if [ -Z $SKIP_VR ]; then
+if [ ! -Z $SKIP_VR ]; then
-	printf "OpenXR SDK 1.0.9 ..."
+	add_cmake_opts -DBUILD_VR_OPENXR=no
-    
-    cd OpenXR-SDK
-    if [ ! -d build ]; then
-        mkdir -p build
-    fi
-    
-    cd build
-    OPENXR_INSTALL_ROOT="${DEPS_INSTALL}/OpenXR-SDK"
-	if [ ! -d $OPENXR_INSTALL_ROOT ]; then
-
-		cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="${OPENXR_INSTALL_ROOT}" -G "${GENERATOR}" -DDYNAMIC_LOADER=ON
-		cmake --build . --config Release
-		cmake --build . --target install --config Release
-	fi
-    
-    add_runtime_dlls "${OPENXR_INSTALL_ROOT}\bin\openxr_loader.dll"
-        
-	add_cmake_opts -DBUILD_VR_OPENXR=on
-    add_cmake_opts -DOPENXR_ROOT="${OPENXR_INSTALL_ROOT}"
-    add_cmake_opts -DOPENXR_LIBRARY="${OPENXR_INSTALL_ROOT}/lib/openxr_loader.lib"
 fi
 
 echo
@@ -919,6 +887,7 @@ if [ ! -z $CI ]; then
 				-DBUILD_MWINIIMPORTER=no \
 				-DBUILD_OPENCS=no \
 				-DBUILD_OPENMW=no \
+				-DBUILD_OPENMW_VR=no \
 				-DBUILD_WIZARD=no
 			;;
 		openmw )
@@ -927,6 +896,7 @@ if [ ! -z $CI ]; then
 				-DBUILD_LAUNCHER=no \
 				-DBUILD_MWINIIMPORTER=no \
 				-DBUILD_OPENCS=no \
+				-DBUILD_OPENMW_VR=no \
 				-DBUILD_WIZARD=no
 			;;
 		vr )
@@ -943,12 +913,14 @@ if [ ! -z $CI ]; then
 				-DBUILD_LAUNCHER=no \
 				-DBUILD_MWINIIMPORTER=no \
 				-DBUILD_OPENMW=no \
+				-DBUILD_OPENMW_VR=no \
 				-DBUILD_WIZARD=no
 			;;
 		misc )
 			echo "  Building subprojects: Misc."
 			add_cmake_opts -DBUILD_OPENCS=no \
-				-DBUILD_OPENMW=no
+				-DBUILD_OPENMW=no \
+				-DBUILD_OPENMW_VR=no
 			;;
 	esac
 fi

CMakeLists.txt

@@ -9,7 +9,7 @@ option(BUILD_BSATOOL            "Build BSA extractor" ON)
 option(BUILD_ESMTOOL            "Build ESM inspector" ON)
 option(BUILD_NIFTEST            "Build nif file tester" ON)
 option(BUILD_DOCS               "Build documentation." OFF )
-option(BUILD_VR_OPENXR          "Build VR support using OpenXR" OFF)
+option(BUILD_OPENMW_VR          "Build VR support using OpenXR" ON)
 option(BUILD_WITH_CODE_COVERAGE "Enable code coverage with gconv" OFF)
 option(BUILD_UNITTESTS          "Enable Unittests with Google C++ Unittest" OFF)
 option(BULLET_USE_DOUBLES       "Use double precision for Bullet" OFF)
@@ -21,7 +21,7 @@ else()
 endif()
 
 # set the minimum required version across the board
-cmake_minimum_required(VERSION 3.1.0)
+cmake_minimum_required(VERSION 3.14)
 
 project(OpenMW)
 
@@ -315,11 +315,6 @@ include_directories("."
     ${BULLET_INCLUDE_DIRS}
 )
 
-if(BUILD_VR_OPENXR)
-  include_directories(${OPENXR_ROOT}/include)
-  link_directories(${OPENXR_ROOT}/lib)
-endif(BUILD_VR_OPENXR)
-
 link_directories(${SDL2_LIBRARY_DIRS} ${Boost_LIBRARY_DIRS})
 
 if(MYGUI_STATIC)
@@ -587,7 +582,7 @@ add_subdirectory (components)
 target_compile_definitions(components PRIVATE OPENMW_DOC_BASEURL="${OPENMW_DOC_BASEURL}")
 
 # Apps and tools
-if (BUILD_OPENMW OR BUILD_VR_OPENXR)
+if (BUILD_OPENMW OR BUILD_OPENMW_VR)
     add_subdirectory( apps/openmw )
 endif()
 
@@ -657,17 +652,17 @@ if (WIN32)
     endif()
 
     # TODO: properties and link targets should be copied from openmw to openmw_vr instead of duplicating every line
-    if (USE_DEBUG_CONSOLE AND BUILD_VR_OPENXR)
+    if (USE_DEBUG_CONSOLE AND BUILD_OPENMW_VR)
       set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_DEBUG "/SUBSYSTEM:CONSOLE")
       set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_RELWITHDEBINFO "/SUBSYSTEM:CONSOLE")
       set_target_properties(openmw_vr PROPERTIES COMPILE_DEFINITIONS $<$<CONFIG:Debug>:_CONSOLE>)
-    elseif (BUILD_VR_OPENXR)
+    elseif (BUILD_OPENMW_VR)
       # Turn off debug console, debug output will be written to visual studio output instead
       set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_DEBUG "/SUBSYSTEM:WINDOWS")
       set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_RELWITHDEBINFO "/SUBSYSTEM:WINDOWS")
     endif()
 
-    if (BUILD_VR_OPENXR)
+    if (BUILD_OPENMW_VR)
         # Release builds don't use the debug console
         set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_RELEASE "/SUBSYSTEM:WINDOWS")
         set_target_properties(openmw_vr PROPERTIES LINK_FLAGS_MINSIZEREL "/SUBSYSTEM:WINDOWS")
@@ -773,7 +768,7 @@ if (WIN32)
         endif()
     endif()
 
-    if (BUILD_VR_OPENXR)
+    if (BUILD_OPENMW_VR)
         if (OPENMW_UNITY_BUILD)
             set_target_properties(openmw_vr PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD} /bigobj")
         else()

apps/openmw/CMakeLists.txt

@@ -235,9 +235,8 @@ if(BUILD_OPENMW)
     endif (WIN32)
 endif()
 
-if(BUILD_VR_OPENXR)
+if(BUILD_OPENMW_VR)
-# TODO: Move this into something akin to add_openmw_dir instead of breaking pattern.
+# TODO: Openmw and openmw_vr should preferrably share game code as a static or shared library
-# Later, openmw and openmw_vr should preferrably share game code as a static or shared library
 # instead of being compiled separately, though for now that's not possible as i depend on
 # USE_OPENXR preprocessor switches.
     set(OPENMW_VR_FILES
@@ -256,9 +255,20 @@ if(BUILD_VR_OPENXR)
         ${APPLE_BUNDLE_RESOURCES}
     )
     
+    # Import the OpenXR SDK
+    include(FetchContent)
+    FetchContent_Declare( 
+        OpenXR 
+        GIT_REPOSITORY https://github.com/KhronosGroup/OpenXR-SDK.git
+        GIT_TAG release-1.0.9
+    )
+    FetchContent_MakeAvailable(OpenXR)
+    target_link_libraries(openmw_vr openxr_loader)
+    target_include_directories(openmw_vr PRIVATE ${openxr_SOURCE_DIR}/include)
+
     # Preprocessor variable used to control code paths to vr code
     target_compile_options(openmw_vr PUBLIC -DUSE_OPENXR -DXR_USE_GRAPHICS_API_OPENGL -DXR_USE_PLATFORM_WIN32)
-    target_link_libraries(openmw_vr ${OPENMW_LINK_TARGETS} ${OPENXR_LIBRARY})
+    target_link_libraries(openmw_vr ${OPENMW_LINK_TARGETS})
     if(APPLE)
         add_custom_command(TARGET openmw_vr
             POST_BUILD