Updated base builds to work with local repo as well as with vcpkg

test/CMakeLists.txt

@@ -1,6 +1,11 @@
 
 enable_testing()
-find_package(GTest CONFIG REQUIRED)
+if(KOMPUTE_OPT_REPO_SUBMODULE_BUILD)
+    add_subdirectory(${PROJECT_SOURCE_DIR}/external/googletest EXCLUDE_FROM_ALL
+        ${CMAKE_CURRENT_BINARY_DIR}/kompute_googletest)
+else()
+    find_package(GTest CONFIG REQUIRED)
+endif()
 
 file(GLOB test_kompute_CPP
     "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp"
@@ -14,9 +19,17 @@ target_include_directories(
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/compiled_shaders_include>
 )
 
-target_link_libraries(test_kompute PRIVATE 
-    GTest::gtest
-    GTest::gmock)
+if(KOMPUTE_OPT_REPO_SUBMODULE_BUILD)
+    target_include_directories(
+        test_kompute PRIVATE
+        ${gtest_SOURCE_DIR}/include)
+
+    target_link_libraries(test_kompute PRIVATE
+        gtest_main)
+else()
+    target_link_libraries(test_kompute PRIVATE 
+        GTest::gtest)
+endif()
 
 target_link_libraries(test_kompute PRIVATE kompute)