Better organisation of CMake project

CMakeLists.txt

@@ -13,15 +13,25 @@ add_custom_target(check
         COMMAND ./clang-tidy.sh
         WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/ci")
 
+# Specify the .cpp files common across all targets
+add_library(common OBJECT
+        src/Message.cpp
+        src/Services/RequestVerificationService.cpp
+        src/Services/TestService.cpp)
+
 # Specify the .cpp files for the executables
-add_executable(ecss_services src/main.cpp src/Message.cpp src/Service.cpp
-        src/Services/TestService.cpp src/Services/RequestVerificationService.cpp)
+add_executable(ecss_services
+        src/main.cpp
+        $<TARGET_OBJECTS:common>
+        src/Platform/x86/Service.cpp)
 
 IF (EXISTS "${PROJECT_SOURCE_DIR}/lib/Catch2/CMakeLists.txt")
+    # Gather all the .cpp files corresponding to tests
+    file(GLOB test_SRC "test/**/*.cpp")
+
     add_subdirectory(lib/Catch2)
-    add_executable(tests src/Message.cpp src/Services/TestService.cpp
-            src/Services/RequestVerificationService.cpp test/tests.cpp
-            test/Message.cpp test/TestPlatform.cpp test/Services/TestService.cpp
-            test/Services/RequestVerificationService.cpp)
+    add_executable(tests
+            $<TARGET_OBJECTS:common>
+            ${test_SRC})
     target_link_libraries(tests Catch2::Catch2)
 ENDIF ()

src/Platform/README.md

+This folder contains platform-specific files:
+
+- **x86**: Files to be run on a PC with a proper operating system
\ No newline at end of file