# Compiles the volk sources as part of a user project.
# Volk comes with a volk.c for this purpose.
# Note that for volk to properly handle platform defines,
# those have to be set at build time.
# Also note that this way the Vulkan headers must
# handled by the user project as well as linking to dl on
# non-Windows platforms.
# For these reasons it's recommended to use one of
# the other ways to include volk (see the other examples).

cmake_minimum_required(VERSION 3.5)
project(volk_test LANGUAGES C)

add_executable(volk_test main.c ../../volk.c)

# Set include path for volk.h
target_include_directories(volk_test PRIVATE ../..)

# Set suitable platform defines
if(CMAKE_SYSTEM_NAME STREQUAL Windows)
  target_compile_definitions(volk_test PRIVATE VK_USE_PLATFORM_WIN32_KHR)
elseif(CMAKE_SYSTEM_NAME STREQUAL Linux)
  target_compile_definitions(volk_test PRIVATE VK_USE_PLATFORM_XLIB_KHR)
elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
  target_compile_definitions(volk_test PRIVATE VK_USE_PLATFORM_MACOS_MVK)
endif()

# Link requires libraries
if(NOT WIN32)
  target_link_libraries(volk_test PRIVATE dl)
endif()

# Get Vulkan dependency
find_package(Vulkan QUIET)
if(TARGET Vulkan::Vulkan)
  # Note: We don't use target_link_libraries for Vulkan::Vulkan to avoid a static dependency on libvulkan1
  target_include_directories(volk_test PRIVATE ${Vulkan_INCLUDE_DIRS})
elseif(DEFINED ENV{VULKAN_SDK})
  target_include_directories(volk_test PRIVATE "$ENV{VULKAN_SDK}/include")
endif()