diff --git a/src/lib/FlightTasks/CMakeLists.txt b/src/lib/FlightTasks/CMakeLists.txt
index 499be46a47..eccc3ba4fb 100644
--- a/src/lib/FlightTasks/CMakeLists.txt
+++ b/src/lib/FlightTasks/CMakeLists.txt
@@ -104,7 +104,9 @@ add_custom_command(
 # Create Flight Tasks Library
 ###########################################
 
-add_compile_options(-Wno-cast-align) # TODO: fix and enable
+add_compile_options(
+	-Wno-cast-align
+	) # TODO: fix and enable
 
 px4_add_library(FlightTasks
 	FlightTasks.cpp
diff --git a/src/modules/mavlink/CMakeLists.txt b/src/modules/mavlink/CMakeLists.txt
index 1c7fe6061d..201d98ebf4 100644
--- a/src/modules/mavlink/CMakeLists.txt
+++ b/src/modules/mavlink/CMakeLists.txt
@@ -40,6 +40,7 @@ px4_add_module(
 	STACK_MAX 1600
 	COMPILE_FLAGS
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	INCLUDES
 		${PX4_SOURCE_DIR}/mavlink/include/mavlink
 	SRCS
diff --git a/src/modules/mavlink/mavlink_tests/CMakeLists.txt b/src/modules/mavlink/mavlink_tests/CMakeLists.txt
index 188d82c23e..f8e0068a1c 100644
--- a/src/modules/mavlink/mavlink_tests/CMakeLists.txt
+++ b/src/modules/mavlink/mavlink_tests/CMakeLists.txt
@@ -43,6 +43,7 @@ px4_add_module(
 		-DMavlinkStream=MavlinkStreamTest
 		-DMavlinkFTP=MavlinkFTPTest
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	SRCS
 		mavlink_tests.cpp
 		mavlink_ftp_test.cpp
diff --git a/src/modules/simulator/CMakeLists.txt b/src/modules/simulator/CMakeLists.txt
index 863d95c2f3..bffe0bbecb 100644
--- a/src/modules/simulator/CMakeLists.txt
+++ b/src/modules/simulator/CMakeLists.txt
@@ -61,6 +61,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	INCLUDES
 		${PX4_SOURCE_DIR}/mavlink/include/mavlink
 	SRCS
diff --git a/src/modules/simulator/accelsim/CMakeLists.txt b/src/modules/simulator/accelsim/CMakeLists.txt
index 5dece53969..d24e562327 100644
--- a/src/modules/simulator/accelsim/CMakeLists.txt
+++ b/src/modules/simulator/accelsim/CMakeLists.txt
@@ -37,6 +37,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	SRCS
 		accelsim.cpp
 	DEPENDS
diff --git a/src/modules/simulator/airspeedsim/CMakeLists.txt b/src/modules/simulator/airspeedsim/CMakeLists.txt
index 0f6510d605..2227e5e875 100644
--- a/src/modules/simulator/airspeedsim/CMakeLists.txt
+++ b/src/modules/simulator/airspeedsim/CMakeLists.txt
@@ -37,6 +37,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	SRCS
 		airspeedsim.cpp
 		meas_airspeed_sim.cpp
diff --git a/src/modules/simulator/barosim/CMakeLists.txt b/src/modules/simulator/barosim/CMakeLists.txt
index b711a792b3..0ad5c0a024 100644
--- a/src/modules/simulator/barosim/CMakeLists.txt
+++ b/src/modules/simulator/barosim/CMakeLists.txt
@@ -37,6 +37,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	SRCS
 		baro.cpp
 	DEPENDS
diff --git a/src/modules/simulator/gpssim/CMakeLists.txt b/src/modules/simulator/gpssim/CMakeLists.txt
index 79b941fbd8..33c42b287d 100644
--- a/src/modules/simulator/gpssim/CMakeLists.txt
+++ b/src/modules/simulator/gpssim/CMakeLists.txt
@@ -37,6 +37,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	SRCS
 		gpssim.cpp
 	DEPENDS
diff --git a/src/modules/simulator/gyrosim/CMakeLists.txt b/src/modules/simulator/gyrosim/CMakeLists.txt
index 04b18d1c5c..d9e26f6f13 100644
--- a/src/modules/simulator/gyrosim/CMakeLists.txt
+++ b/src/modules/simulator/gyrosim/CMakeLists.txt
@@ -37,6 +37,7 @@ px4_add_module(
 	COMPILE_FLAGS
 		-Wno-double-promotion
 		-Wno-cast-align # TODO: fix and enable
+		-Wno-address-of-packed-member # TODO: fix in c_library_v2
 	STACK_MAIN 1200
 	SRCS
 		gyrosim.cpp