cmake: Minor CMake cleanup

- Fix project name to be less confusing
- Better testing

tests/CMakeLists.txt

@@ -18,6 +18,8 @@
 # NOTE: For us testing just means that these header files compile
 # with reasonable warnings.
 
+message(STATUS "${PROJECT_NAME} = ${PROJECT_VERSION}")
+
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_C_EXTENSIONS OFF)
@@ -38,3 +40,7 @@ target_link_libraries(vk_icd PRIVATE Vulkan::Headers)
 # vk_layer.h
 add_library(vk_layer MODULE vk_layer.c)
 target_link_libraries(vk_layer PRIVATE Vulkan::Headers)
+
+if (NOT TARGET Vulkan-Headers)
+    message(FATAL_ERROR "Backcompat for Vulkan-Headers target broken!")
+endif()

tests/find_package/CMakeLists.txt

@@ -1,8 +1,8 @@
-cmake_minimum_required(VERSION 3.10.2)
+cmake_minimum_required(VERSION 3.14.2)
 
 project(TEST_VULKAN_HEADERS_FIND_PACKAGE_SUPPORT LANGUAGES C)
 
-find_package(VulkanHeaders REQUIRED CONFIG) 
+find_package(VulkanHeaders REQUIRED CONFIG)
 
 if (NOT TARGET Vulkan::Headers)
     message(FATAL_ERROR "Vulkan::Headers target not defined")
@@ -21,3 +21,12 @@ if (NOT DEFINED VulkanHeaders_VERSION)
     message(FATAL_ERROR "VulkanHeaders_VERSION not defined!")
 endif()
 message(STATUS "VulkanHeaders_VERSION = ${VulkanHeaders_VERSION}")
+
+add_library(foobar STATIC)
+
+target_link_libraries(foobar PRIVATE Vulkan::Headers)
+
+target_sources(foobar PRIVATE
+    ../vk_icd.c
+    ../vk_layer.c
+)