diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9aa947d..8a1060f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,13 +3,18 @@ cmake_minimum_required(VERSION 3.10)
 project(reflex2q3 CXX)
 
 set(OBJ_SRC "src/planes.cpp" "src/brushdef.cpp" "src/oopless-parser.cpp" "src/EntityConverter.cpp")
-add_executable(reflex2q3 src/main.cpp ${OBJ_SRC})
-add_executable(runtests test/catch.cpp ${OBJ_SRC})
+add_library(objects OBJECT ${OBJ_SRC})
+
+add_executable(reflex2q3 src/main.cpp)
+add_executable(runtests test/catch.cpp)
+target_link_libraries(reflex2q3 objects)
+target_link_libraries(runtests objects)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 find_package(PkgConfig)
+# find_package("eigen")
 pkg_check_modules(EIGEN REQUIRED eigen3)
 
 include_directories(