From b0b336f98790b0697901fcd73dbc690b900c0539 Mon Sep 17 00:00:00 2001
From: ThatTanishqTak <tanishqtak3@gmail.com>
Date: Mon, 17 Nov 2025 23:31:38 +0000
Subject: [PATCH] Updated the CMakeLists.txt

---
 CMakeLists.txt                      | 10 ++++++++++
 examples/vulkan-demo/CMakeLists.txt | 23 +++++++++++++++--------
 2 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 191b2f7..d23b65e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,13 @@ option(CLAY_INCLUDE_WIN32_GDI_EXAMPLES "Build Win32 GDI examples" OFF)
 option(CLAY_INCLUDE_SOKOL_EXAMPLES "Build Sokol examples" OFF)
 option(CLAY_INCLUDE_PLAYDATE_EXAMPLES "Build Playdate examples" OFF)
 
+# Enable Vulkan demo by default when the Windows generator can see a Vulkan SDK installation.
+set(CLAY_INCLUDE_VULKAN_DEMO_DEFAULT OFF)
+if(WIN32 AND DEFINED ENV{VULKAN_SDK})
+  set(CLAY_INCLUDE_VULKAN_DEMO_DEFAULT ON)
+endif()
+option(CLAY_INCLUDE_VULKAN_DEMO "Build Vulkan demo (requires Vulkan SDK)" ${CLAY_INCLUDE_VULKAN_DEMO_DEFAULT})
+
 message(STATUS "CLAY_INCLUDE_DEMOS: ${CLAY_INCLUDE_DEMOS}")
 
 if(APPLE)
@@ -44,6 +51,9 @@ if(CLAY_INCLUDE_ALL_EXAMPLES OR CLAY_INCLUDE_SOKOL_EXAMPLES)
   add_subdirectory("examples/sokol-video-demo")
   add_subdirectory("examples/sokol-corner-radius")
 endif()
+if(CLAY_INCLUDE_ALL_EXAMPLES OR CLAY_INCLUDE_VULAKN_EXAMPLES)
+  add_subdirectory("examples/vulkan-demo")
+endif()
 
 # Playdate example not included in ALL because users need to install the playdate SDK first which requires a license agreement
 if(CLAY_INCLUDE_PLAYDATE_EXAMPLES)
diff --git a/examples/vulkan-demo/CMakeLists.txt b/examples/vulkan-demo/CMakeLists.txt
index d2cfd90..192fac5 100644
--- a/examples/vulkan-demo/CMakeLists.txt
+++ b/examples/vulkan-demo/CMakeLists.txt
@@ -8,14 +8,21 @@ include(FetchContent)
 set(FETCHCONTENT_QUIET FALSE)
 
 # GLFW is used only for window creation and Vulkan surface management in this demo.
-FetchContent_Declare(
-    glfw
-    GIT_REPOSITORY "https://github.com/glfw/glfw.git"
-    GIT_TAG "3.4"
-    GIT_PROGRESS TRUE
-    GIT_SHALLOW TRUE
-)
-FetchContent_MakeAvailable(glfw)
+# When other examples are enabled (e.g., raylib), GLFW may already be present via
+# their dependencies. Guarding the population prevents duplicate target errors
+# (CMP0002) while still reusing the existing GLFW target when available.
+if(NOT TARGET glfw)
+    FetchContent_Declare(
+        glfw
+        GIT_REPOSITORY "https://github.com/glfw/glfw.git"
+        GIT_TAG "3.4"
+        GIT_PROGRESS TRUE
+        GIT_SHALLOW TRUE
+    )
+    FetchContent_MakeAvailable(glfw)
+else()
+    message(STATUS "Reusing existing GLFW target for Vulkan demo")
+endif()
 
 find_package(Vulkan REQUIRED)