Added usage of PROJECT_IS_TOP_LEVEL around find_package in CMakeLists.txt
See #303
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 959058c..a1397dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,9 @@
project(VulkanMemoryAllocator)
-find_package(Vulkan REQUIRED)
+if(PROJECT_IS_TOP_LEVEL)
+ find_package(Vulkan REQUIRED)
+endif()
include_directories(${Vulkan_INCLUDE_DIR})
# VulkanMemoryAllocator contains an sample application which is not built by default
@@ -30,7 +32,9 @@
set(VMA_BUILD_SAMPLE_SHADERS ON)
endif(VMA_BUILD_SAMPLE)
-find_package(Doxygen)
+if(PROJECT_IS_TOP_LEVEL)
+ find_package(Doxygen)
+endif()
option(BUILD_DOCUMENTATION "Create and install the HTML based API documentation (requires Doxygen)" OFF)
if(BUILD_DOCUMENTATION)
