Как использовать несколько GTests в CMake

У меня есть следующая структура проекта:

- include
  - func.h
- src
  - main.cpp
  - func.cpp
- tests
  - CMakeLists.txt
  - func1_test.cpp
  - func2_test.cpp
- CMakeLists.txt

Вот корень CMakeLists.txt:

cmake_minimum_required (VERSION 3.12)

option(BUILD_TESTS "BuildTests" ON)
set(PROJECT_VERSION "0.0.3" CACHE INTERNAL "Version")

project ("test_project" VERSION ${PROJECT_VERSION})
add_executable (test_project "src/main.cpp" "src/func.cpp" "include/func.h")
include_directories("include")

set_property(TARGET test_project PROPERTY CXX_STANDARD 20)

# Enable Hot Reload for MSVC compilers if supported.
if (POLICY CMP0141)
  cmake_policy(SET CMP0141 NEW)
  set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT "$<IF:$<AND:$<C_COMPILER_ID:MSVC>,$<CXX_COMPILER_ID:MSVC>>,$<$<CONFIG:Debug,RelWithDebInfo>:EditAndContinue>,$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>>")
endif ()

set_target_properties(test_project
    PROPERTIES
    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
)

# Tests.
if (BUILD_TESTS)
    enable_testing()
    add_subdirectory(tests)
endif ()

А вот тесты CMakeLists.txt:

include(FetchContent)
if (POLICY CMP0135)
  cmake_policy(SET CMP0135 NEW)
endif ()
FetchContent_Declare(
  googletest
  URL https://github.com/google/googletest/archive/refs/tags/v1.14.0.zip
)
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
FetchContent_MakeAvailable(googletest)

include(GoogleTest)

set(TestsToRun
  func1_test.cpp
  func2_test.cpp
)
create_test_sourcelist (Tests CppTests.cpp ${TestsToRun})
add_executable (CppTests ${Tests})
target_include_directories(CppTests PRIVATE "include")
set_property(TARGET CppTests PROPERTY CXX_STANDARD 20)
target_link_libraries(CppTests GTest::gtest_main)
set_target_properties(CppTests
    PROPERTIES
    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
)
foreach (test ${TestsToRun})
    get_filename_component (TName ${test} NAME_WE)
    add_test (NAME ${TName} COMMAND CppTests ${TName})
    #gtest_discover_tests(${test})
endforeach ()

func.h:

#pragma once
int func1();
int func2();

func.cpp:

#include "func.h"

int func1()
{
    return 33;
}

int func2()
{
    return 77;
}

Я пытаюсь использовать create_test_sourcelist из документации CMake. Но построение дает мне следующую ошибку:

[main] Building folder: /home/user/Code/Test/build/linux-debug 
[build] Starting build
[proc] Executing command: /usr/bin/cmake --build /home/user/Code/Test/build/linux-debug --parallel 22 --
[build] [ 20%] Built target test_project
[build] [ 33%] Built target gtest
[build] [ 46%] Built target gtest_main
[build] [ 60%] Built target gmock
[build] [ 73%] Built target gmock_main
[build] [ 80%] Linking CXX executable ../bin/CppTests
[build] /usr/bin/ld: CMakeFiles/CppTests.dir/CppTests.cpp.o:(.data.rel.ro+0x8): undefined reference to `func1_test(int, char**)'
[build] /usr/bin/ld: CMakeFiles/CppTests.dir/CppTests.cpp.o:(.data.rel.ro+0x18): undefined reference to `func2_test(int, char**)'
[build] /usr/bin/ld: CMakeFiles/CppTests.dir/func1_test.cpp.o: in function `Func1Test_Func1Test_Test::TestBody()':
[build] /home/user/Code/Test/tests/func1_test.cpp:9:(.text+0x28): undefined reference to `func1()'
[build] /usr/bin/ld: CMakeFiles/CppTests.dir/func2_test.cpp.o: in function `Func21Test_Func2Test_Test::TestBody()':
[build] /home/user/Code/Test/tests/func2_test.cpp:9:(.text+0x28): undefined reference to `func2()'
[build] collect2: error: ld returned 1 exit status
[build] gmake[2]: *** [tests/CMakeFiles/CppTests.dir/build.make:131: bin/CppTests] Error 1
[build] gmake[1]: *** [CMakeFiles/Makefile2:180: tests/CMakeFiles/CppTests.dir/all] Error 2
[build] gmake: *** [Makefile:146: all] Error 2
[proc] The command: /usr/bin/cmake --build /home/user/Code/Test/build/linux-debug --parallel 22 -- exited with code: 2
[driver] Build completed: 00:00:00.352
[build] Build finished with exit code 2

Обратите внимание: я прокомментировал вызов gtest_discover_tests, потому что не понимаю, стоит ли мне его использовать и какую переменную для этого использовать. Вот func1_test.cpp (func2_test.cpp выглядит похоже):

#include <sstream>
#include <limits>
#include <gtest/gtest.h>

#include "../include/func.h"

TEST(Func1Test, Func1Test)
{
    ASSERT_EQ(func1(), 33);
}