diff --git a/ports/rxv1/ccrx/CMakeLists.txt b/ports/rxv1/ccrx/CMakeLists.txt
new file mode 100644
index 00000000..fabadffe
--- /dev/null
+++ b/ports/rxv1/ccrx/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.src 
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.src
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)
diff --git a/ports/rxv1/gnu/CMakeLists.txt b/ports/rxv1/gnu/CMakeLists.txt
new file mode 100644
index 00000000..9357c697
--- /dev/null
+++ b/ports/rxv1/gnu/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.S
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)
diff --git a/ports/rxv2/ccrx/CMakeLists.txt b/ports/rxv2/ccrx/CMakeLists.txt
new file mode 100644
index 00000000..fabadffe
--- /dev/null
+++ b/ports/rxv2/ccrx/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.src 
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.src
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)
diff --git a/ports/rxv2/gnu/CMakeLists.txt b/ports/rxv2/gnu/CMakeLists.txt
index 3c68a689..9357c697 100644
--- a/ports/rxv2/gnu/CMakeLists.txt
+++ b/ports/rxv2/gnu/CMakeLists.txt
@@ -2,11 +2,13 @@
 target_sources(${PROJECT_NAME}
     PRIVATE
     # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.S
 	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.S
     # {{END_TARGET_SOURCES}}
 )
diff --git a/ports/rxv3/ccrx/CMakeLists.txt b/ports/rxv3/ccrx/CMakeLists.txt
new file mode 100644
index 00000000..fabadffe
--- /dev/null
+++ b/ports/rxv3/ccrx/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.src 
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.src
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.src
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)
diff --git a/ports/rxv3/gnu/CMakeLists.txt b/ports/rxv3/gnu/CMakeLists.txt
new file mode 100644
index 00000000..9357c697
--- /dev/null
+++ b/ports/rxv3/gnu/CMakeLists.txt
@@ -0,0 +1,19 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_initialize_low_level.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.S
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)