From 74a2ce1e91ff31640123b91ff87b0a362f6c4cee Mon Sep 17 00:00:00 2001
From: Jan Kuhlmann <33833587+M2-TE@users.noreply.github.com>
Date: Tue, 18 Feb 2025 08:15:37 +0100
Subject: [PATCH] CMake: Offer multiple choices for Vulkan C headers (#2075)

* offer multiple choices for Vulkan C headers

* replaced redundant link
---
 CMakeLists.txt | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a124359..6c777ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -213,10 +213,18 @@ endif()
 add_library( VulkanHpp INTERFACE )
 add_library( Vulkan::Hpp ALIAS VulkanHpp )
 target_include_directories( VulkanHpp INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}" )
-target_include_directories( VulkanHpp INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/Vulkan-Headers/include" )
 if( VULKAN_HPP_RUN_GENERATOR )
 	add_dependencies( VulkanHpp build_vulkan_hpp build_video_hpp )
 endif()
+# Get Vulkan C headers from subdirectory, existing target or FindVulkan
+if ( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/Vulkan-Headers/include" AND IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/Vulkan-Headers/include")
+	target_include_directories( VulkanHpp INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/Vulkan-Headers/include" )
+else()
+	if ( NOT TARGET Vulkan::Headers )
+		find_package( Vulkan REQUIRED )
+	endif()
+	target_link_libraries( VulkanHpp INTERFACE Vulkan::Headers )
+endif()
 
 # set up compile definitions
 if ( VULKAN_HPP_DISABLE_ENHANCED_MODE )