Merge branch 'mohr/rtems' into windows

CMakeLists.txt

@@ -153,7 +153,7 @@ if(FSFW_BUILD_TESTS)
       "${MSG_PREFIX} Building the FSFW unittests in addition to the static library"
   )
   # Check whether the user has already installed Catch2 first
-  find_package(Catch2 ${FSFW_CATCH2_LIB_MAJOR_VERSION})
+  find_package(Catch2 ${FSFW_CATCH2_LIB_MAJOR_VERSION} QUIET)
   # Not installed, so use FetchContent to download and provide Catch2
   if(NOT Catch2_FOUND)
     message(
@@ -174,6 +174,27 @@ if(FSFW_BUILD_TESTS)
   configure_file(unittests/testcfg/FSFWConfig.h.in FSFWConfig.h)
   configure_file(unittests/testcfg/TestsConfig.h.in tests/TestsConfig.h)
 
+  if(FSFW_OSAL MATCHES "freertos")
+    message(STATUS "${MSG_PREFIX} Downloading FreeRTOS with FetchContent")
+    include(FetchContent)
+
+    set(FreeRTOS_PORT posix)
+
+    FetchContent_Declare(
+      FreeRTOS
+      GIT_REPOSITORY https://egit.irs.uni-stuttgart.de/fsfw/FreeRTOS-LTS
+      GIT_TAG develop
+      GIT_SUBMODULES FreeRTOS/FreeRTOS-Kernel)
+
+    FetchContent_MakeAvailable(FreeRTOS)
+
+    set(LIB_OS_NAME FreeRTOS)
+    target_include_directories(FreeRTOS PUBLIC unittests/testcfg/freertos)
+    set(THREADS_PREFER_PTHREAD_FLAG ON)
+    find_package(Threads REQUIRED)
+    target_link_libraries(FreeRTOS PRIVATE ${CMAKE_THREAD_LIBS_INIT})
+  endif()
+
   project(${FSFW_TEST_TGT} CXX C)
   add_executable(${FSFW_TEST_TGT})
   if(IPO_SUPPORTED AND FSFW_ENABLE_IPO)
@@ -226,6 +247,7 @@ if(FSFW_FETCH_CONTENT_TARGETS)
     # GitHub issue: https://github.com/catchorg/Catch2/issues/2417
     set_target_properties(Catch2 PROPERTIES DEBUG_POSTFIX "")
   endif()
+
 endif()
 
 set(FSFW_CORE_INC_PATH "inc")
@@ -360,6 +382,9 @@ if(FSFW_BUILD_TESTS)
   endif()
   target_link_libraries(${FSFW_TEST_TGT} PRIVATE Catch2::Catch2
                                                  ${LIB_FSFW_NAME})
+  if(FSFW_OSAL MATCHES "freertos")
+    target_link_libraries(${FSFW_TEST_TGT} PRIVATE FreeRTOS)
+  endif()
 endif()
 
 # The project CMakeLists file has to set the FSFW_CONFIG_PATH and add it. If