Unbundle RCT and use our own copy.

--- rtags-2.16/src/CMakeLists.txt	2018-01-23 10:36:17.645855140 +0100
+++ rtags-2.16/src/CMakeLists.txt	2018-01-23 10:38:14.605234740 +0100
@@ -105,12 +105,6 @@ if (LUA_ENABLED)
         CMAKE_ARGS -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=0 -DCMAKE_GENERATOR=${CMAKE_GENERATOR})
 endif ()
 
-set(RCT_RTTI_ENABLED 1)
-set(RCT_NO_INSTALL 1)
-set(RCT_NO_LIBRARY 1)
-# Everyting which as been set either in rct/rct.cmake or rct/compiler.cmake
-# doesn't need to be set in this file again.
-include(rct/rct.cmake)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wstrict-aliasing=2 -Wcast-qual -fPIC")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-aliasing=2 -Wcast-qual -fPIC")
@@ -128,8 +122,7 @@ add_definitions(
     "-DRTAGS_SOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}"
     "-DCLANG_LIBDIR=${LIBCLANG_LIBDIR}"
     "-DCLANG_VERSION=${LIBCLANG_VERSION_STRING}"
-    "-DOS_${CMAKE_SYSTEM_NAME}"
-    ${RCT_DEFINITIONS})
+    "-DOS_${CMAKE_SYSTEM_NAME}")
 
 if (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
     add_definitions(-D__LONG_LONG_SUPPORTED)
@@ -172,8 +165,7 @@ set(RTAGS_SOURCES
     Symbol.cpp
     SymbolInfoJob.cpp
     Token.cpp
-    TokensJob.cpp
-    ${RCT_SOURCES})
+    TokensJob.cpp)
 
 if (LUA_ENABLED)
     list(APPEND RTAGS_SOURCES AST.cpp)
@@ -195,10 +187,10 @@ endif ()
 
 include_directories(
     ${CMAKE_CURRENT_LIST_DIR}
-    ${RCT_INCLUDE_DIRS}
     ${CMAKE_CURRENT_LIST_DIR}/selene/include
     ${CMAKE_CURRENT_BINARY_DIR}/lua-prefix/src/lua-build
-    ${CMAKE_CURRENT_LIST_DIR}/lua/src)
+    ${CMAKE_CURRENT_LIST_DIR}/lua/src
+    ${CMAKE_CURRENT_BINARY_DIR}/include)
 
 if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
     set(START_GROUP "")
@@ -223,17 +215,17 @@ else ()
 endif()
 
 # RCT_LIBRARIES and stdc++ library must be at the end
-set(RTAGS_LIBRARIES ${RTAGS_LIBRARIES} -lstdc++ ${RCT_LIBRARIES})
+set(RTAGS_LIBRARIES ${RTAGS_LIBRARIES} -lstdc++)
 add_executable(rc rc.cpp)
-target_link_libraries(rc ${RTAGS_LIBRARIES})
+target_link_libraries(rc ${RTAGS_LIBRARIES} rct)
 
 add_executable(rdm rdm.cpp)
-target_link_libraries(rdm ${RTAGS_LIBRARIES})
+target_link_libraries(rdm ${RTAGS_LIBRARIES} rct)
 
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 
 add_executable(rp rp.cpp)
-target_link_libraries(rp ${RTAGS_LIBRARIES})
+target_link_libraries(rp ${RTAGS_LIBRARIES} rct)
 
 if (CYGWIN)
     EnsureLibraries(rdm rct)