Add all cmakelist files

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.1)
+
+include(ExternalProject)
+
+project(DoRayMe)
+
+set(CMAKE_CXX_STANDARD 11)
+
+
+#Add external projects that directly need to be builded
+ExternalProject_Add(googletest
+        SOURCE_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/external/googletest"
+        BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/external/googletest"
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND     ""
+        INSTALL_COMMAND   ""
+        TEST_COMMAND      ""
+)
+
+# Main app
+add_subdirectory(source)
+# Unit Tests
+add_subdirectory(tests)

source/CMakeLists.txt

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+# To simplify testing, the app is build in two passes,
+
+# First most is build as a library
+add_library(rayonnement STATIC math_helper.cpp)
+
+set(RAY_HEADERS include/tuples.h include/math_helper.h)
+set(RAY_SOURCES tuples.cpp)
+
+target_include_directories(rayonnement PUBLIC include)
+target_sources(rayonnement PRIVATE ${RAY_HEADERS} ${RAY_SOURCES})
+
+
+# Second we build the main executable
+add_executable(dorayme main.cpp)
+target_include_directories(rayonnement PUBLIC include)
+target_link_libraries(dorayme rayonnement)

tests/CMakeLists.txt

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+project(DoRayTested)
+
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads REQUIRED)
+
+set(TESTS_SRC tuples_test.cpp)
+
+add_executable(testMyRays)
+target_include_directories(testMyRays PUBLIC ${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
+target_include_directories(testMyRays PUBLIC ../source/include)
+target_sources(testMyRays PRIVATE ${TESTS_SRC})
+target_link_libraries(testMyRays gtest gtest_main rayonnement Threads::Threads)