From 80d51ac8a64dc0e42cfa92b8204a5d77643d9414 Mon Sep 17 00:00:00 2001
From: Dennis Brakhane <brakhane@gmail.com>
Date: Mon, 28 Jul 2025 09:02:49 +0200
Subject: [PATCH] cmake: add support for unity builds (#1186)

---
 Samples/Example_ImGui/CMakeLists.txt         |  2 +-
 Samples/Example_ImGui_Docking/CMakeLists.txt |  2 +-
 WickedEngine/CMakeLists.txt                  | 12 ++++++++++++
 WickedEngine/Utility/CMakeLists.txt          | 10 +++++-----
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/Samples/Example_ImGui/CMakeLists.txt b/Samples/Example_ImGui/CMakeLists.txt
index 77605816d..f0b1550c4 100644
--- a/Samples/Example_ImGui/CMakeLists.txt
+++ b/Samples/Example_ImGui/CMakeLists.txt
@@ -63,7 +63,7 @@ endif ()
 if (MSVC)
 	set_property(TARGET Example_ImGui PROPERTY VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
 endif ()
-
+set_property(TARGET Example_ImGui PROPERTY UNITY_BUILD NO)
 
 # Copy content to build folder:
 add_dependencies(Example_ImGui Content)
diff --git a/Samples/Example_ImGui_Docking/CMakeLists.txt b/Samples/Example_ImGui_Docking/CMakeLists.txt
index d730f739c..dbccdae46 100644
--- a/Samples/Example_ImGui_Docking/CMakeLists.txt
+++ b/Samples/Example_ImGui_Docking/CMakeLists.txt
@@ -69,7 +69,7 @@ endif ()
 if (MSVC)
 	set_property(TARGET Example_ImGui_Docking PROPERTY VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
 endif ()
-
+set_property(TARGET Example_ImGui_Docking PROPERTY UNITY_BUILD NO)
 
 # Copy content to build folder:
 add_dependencies(Example_ImGui_Docking Content)
diff --git a/WickedEngine/CMakeLists.txt b/WickedEngine/CMakeLists.txt
index 9a06c7446..d37cf4462 100644
--- a/WickedEngine/CMakeLists.txt
+++ b/WickedEngine/CMakeLists.txt
@@ -170,6 +170,7 @@ else ()
 
 	set_target_properties(FAudio PROPERTIES
 		POSITION_INDEPENDENT_CODE ${WICKED_PIC}
+		UNITY_BUILD NO
 	)
 	set(WICKEDENGINE_STATIC_LIBRARIES ${WICKEDENGINE_STATIC_LIBRARIES} FAudio)
 
@@ -195,6 +196,17 @@ add_custom_command(
 		COMMAND ${CMAKE_COMMAND} -E create_symlink ${WICKED_ROOT_DIR}/WickedEngine/shaders ${CMAKE_CURRENT_BINARY_DIR}/shaders
 )
 
+set_property(SOURCE
+	wiAudio.cpp
+	wiOcean.cpp
+	wiPrimitive_BindLUA.cpp
+	wiPhysics_Jolt.cpp
+	wiGraphicsDevice_Vulkan.cpp
+	wiGraphicsDevice_DX12.cpp
+
+	PROPERTY SKIP_UNITY_BUILD_INCLUSION TRUE
+)
+set_property(TARGET LUA PROPERTY UNITY_BUILD NO)
 
 # OFFLINE SHADER COMPILER
 add_executable(offlineshadercompiler
diff --git a/WickedEngine/Utility/CMakeLists.txt b/WickedEngine/Utility/CMakeLists.txt
index 965353780..1ccf9761c 100644
--- a/WickedEngine/Utility/CMakeLists.txt
+++ b/WickedEngine/Utility/CMakeLists.txt
@@ -45,11 +45,11 @@ set_property(
 	PROPERTY HEADER_FILE_ONLY ON
 )
 
-if (NOT WIN32)
-	list(REMOVE_ITEM SOURCE_FILES
-		${CMAKE_CURRENT_SOURCE_DIR}/D3D12MemAlloc.cpp
-	)
-endif()
+# linux doesn't support it, and windows includes
+# it directly in wiGraphicsDevice_DX12.cpp
+list(REMOVE_ITEM SOURCE_FILES
+	${CMAKE_CURRENT_SOURCE_DIR}/D3D12MemAlloc.cpp
+)
 add_library(Utility STATIC
 	${SOURCE_FILES}
 	${HEADER_FILES}