From: Andrew Udvare <audvare@gmail.com>
Subject: [PATCH] Use system RapidJSON and GoogleTest

Both are vendored under thirdparty/ as whole copies, and both are packaged.
The sources include them as <rapidjson/...> and <gtest/gtest.h>, so the system
copies are found with no include path of their own.

The two license files under thirdparty/ are dropped from RELEASE_CONTENTS with
them, so nothing refers to directories that no longer exist.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb3f25d..c83492d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,7 +75,6 @@ add_library(ccc STATIC
 	src/ccc/util.cpp
 	src/ccc/util.h
 )
-target_link_libraries(ccc rapidjson)
 
 add_library(ccc_mips STATIC
 	src/mips/insn.cpp
@@ -112,7 +111,7 @@ target_link_libraries(uncc ccc ccc_platform ccc_versioninfo demanglegnu)
 
 add_executable(tests src/tests.cpp ${TEST_SOURCES})
 target_include_directories(tests PUBLIC src/)
-target_link_libraries(tests ccc ccc_platform ccc_versioninfo demanglegnu gtest)
+target_link_libraries(tests ccc ccc_platform ccc_versioninfo demanglegnu GTest::gtest)
 add_test(NAME tests COMMAND tests ${CMAKE_SOURCE_DIR}/testdata)
 
 if(WIN32)
@@ -125,10 +124,7 @@ endif()
 
 add_subdirectory(thirdparty/demanglegnu EXCLUDE_FROM_ALL)
 
-set(gtest_force_shared_crt on)
-add_subdirectory(thirdparty/googletest EXCLUDE_FROM_ALL)
-
-add_subdirectory(thirdparty/rapidjson EXCLUDE_FROM_ALL)
+find_package(GTest REQUIRED)
 
 # All the files to be included in a release.
 set(RELEASE_CONTENTS
@@ -141,7 +137,5 @@ set(RELEASE_CONTENTS
 	"${CMAKE_SOURCE_DIR}/License.txt"
 	"${CMAKE_SOURCE_DIR}/thirdparty/demanglegnu/DemanglerLicenseGPL.txt"
 	"${CMAKE_SOURCE_DIR}/thirdparty/demanglegnu/DemanglerLicenseLGPL.txt"
-	"${CMAKE_SOURCE_DIR}/thirdparty/googletest/GoogleTestLicense.txt"
-	"${CMAKE_SOURCE_DIR}/thirdparty/rapidjson/RapidJSONLicense.txt"
 )
 include(cmake/release_crafter.cmake)