我试着理解以前的帮助：

• https://stackoverflow.com/a/73623890/136285

所以我用gtest写了一个非常简单的项目用例。

目前我有：

% cat CMakeLists.txt
cmake_minimum_required(VERSION 3.24)
project(p)
include(FetchContent)
FetchContent_Declare(
  googletest
  GIT_REPOSITORY https://github.com/google/googletest.git
  GIT_TAG        58d77fa8070e8cec2dc1ed015d66b454c8d78850 # release-1.12.1
  OVERRIDE_FIND_PACKAGE
FetchContent_MakeAvailable(googletest)
if(TARGET GTest::gtest_main)
  message("Target was found")
endif()
find_package(GTest 1.12.1 REQUIRED)
# Now make sure hwy uses our gtest 1.12.1:
set(HWY_SYSTEM_GTEST ON CACHE BOOL "")
FetchContent_Declare(
  GIT_REPOSITORY https://github.com/google/highway.git
  GIT_TAG        22e3d7276f4157d4a47586ba9fd91dd6303f441a # 1.0.1
FetchContent_MakeAvailable(hwy)

如果我运行它，我得到的是：

$ cmake ..