From: Paul Zander <negril.nx+gentoo@gmail.com>
Subject: [PATCH] CMake: use system gtest instead of fetching it

diff --git a/test/unittests/CMakeLists.txt b/test/unittests/CMakeLists.txt
index 4d07cdb..976b8e5 100644
--- a/test/unittests/CMakeLists.txt
+++ b/test/unittests/CMakeLists.txt
@@ -1,10 +1,7 @@
 cmake_minimum_required(VERSION 3.11)
 
-include(FetchContent)
-FetchContent_Declare(gtest
-  QUIET
-  URL https://github.com/google/googletest/archive/refs/tags/release-1.11.0.zip
-)
+enable_testing()
+find_package(GTest REQUIRED)
 
 # Prevent overriding the parent project's linker settings, for Windows.
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
@@ -15,10 +12,6 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   add_compile_options("-Wno-error=covered-switch-default")
 endif()
 
-FetchContent_MakeAvailable(gtest)
-
-include(GoogleTest)
-
 include_directories(../../src)
 
 set(UNITTESTS_ROOT ${CMAKE_CURRENT_LIST_DIR})
@@ -39,7 +32,7 @@ function(add_lldb_mi_test NAME TEST)
   endforeach(SRC)
 
   add_executable(${NAME} ${TEST} ${SOURCES_RELATIVE})
-  target_link_libraries(${NAME} gtest_main)
+  target_link_libraries(${NAME} GTest::gtest GTest::gtest_main)
   set_target_properties(${NAME} PROPERTIES FOLDER "unittests")
 
   gtest_discover_tests(${NAME})