diff --git a/src/modm/platform/clock/stm32/rcc.cpp.in b/src/modm/platform/clock/stm32/rcc.cpp.in
index 3e1c73ae44..7cd40d1661 100644
--- a/src/modm/platform/clock/stm32/rcc.cpp.in
+++ b/src/modm/platform/clock/stm32/rcc.cpp.in
@@ -23,8 +23,8 @@ modm_weak void SystemCoreClockUpdate() { /* Nothing to update */ }
 
 namespace modm::platform
 {
-constinit uint16_t modm_fastdata delay_fcpu_MHz(computeDelayMhz(Rcc::BootFrequency));
-constinit uint16_t modm_fastdata delay_ns_per_loop(computeDelayNsPerLoop(Rcc::BootFrequency));
+constinit uint16_t modm_fastdata modm_used delay_fcpu_MHz(computeDelayMhz(Rcc::BootFrequency));
+constinit uint16_t modm_fastdata modm_used delay_ns_per_loop(computeDelayNsPerLoop(Rcc::BootFrequency));
 
 // ----------------------------------------------------------------------------
 %% if target.family == "f0"
diff --git a/src/modm/platform/core/cortex/vectors.c.in b/src/modm/platform/core/cortex/vectors.c.in
index 907b064e19..c7002ec874 100644
--- a/src/modm/platform/core/cortex/vectors.c.in
+++ b/src/modm/platform/core/cortex/vectors.c.in
@@ -33,7 +33,7 @@ typedef void (* const FunctionPointer)(void);
 extern uint32_t __main_stack_top[];
 
 // Define the vector table
-modm_section(".vector_rom")
+modm_section(".vector_rom") modm_used
 FunctionPointer vectorsRom[] =
 {
 	(FunctionPointer)__main_stack_top,		// -16: stack pointer
@@ -50,7 +50,7 @@ FunctionPointer vectorsRom[] =
 };
 %% if vector_table_location == "ram"
 // reserve space for the remapped vector table in RAM
-modm_section(".vector_ram")
+modm_section(".vector_ram") modm_used
 FunctionPointer vectorsRam[sizeof(vectorsRom) / sizeof(FunctionPointer)];
 %% endif
 
@@ -65,7 +65,8 @@ FunctionPointer vectorsRam[sizeof(vectorsRom) / sizeof(FunctionPointer)];
 #include <modm/architecture/interface/assert.h>
 %% endif
 
-void Undefined_Handler(void)
+modm_used void
+Undefined_Handler(void)
 {
 %% if with_assert
 	const int32_t irqn = ((int32_t)__get_IPSR()) - 16;
diff --git a/src/modm/platform/heap/cortex/heap_newlib.cpp b/src/modm/platform/heap/cortex/heap_newlib.cpp
index 0987802536..83d1a506a9 100644
--- a/src/modm/platform/heap/cortex/heap_newlib.cpp
+++ b/src/modm/platform/heap/cortex/heap_newlib.cpp
@@ -40,7 +40,7 @@ void __modm_initialize_memory(void)
  *  Note:  This implementation is not thread safe (despite taking a
  *         _reent structure as a parameter).
  */
-void *
+modm_used void *
 _sbrk_r(struct _reent *,  ptrdiff_t size)
 {
 	const uint8_t *const heap = heap_top;
diff --git a/src/modm/platform/heap/cortex/no_heap.c.in b/src/modm/platform/heap/cortex/no_heap.c.in
index 4c963b885e..273d18f4e0 100644
--- a/src/modm/platform/heap/cortex/no_heap.c.in
+++ b/src/modm/platform/heap/cortex/no_heap.c.in
@@ -19,7 +19,7 @@ void __modm_initialize_memory(void)
 }
 
 // ----------------------------------------------------------------------------
-modm_weak modm_section("{{ no_heap_section }}")
+modm_weak modm_used modm_section("{{ no_heap_section }}")
 void* _sbrk_r(struct _reent *r, ptrdiff_t size)
 {
 	(void) r;
diff --git a/tools/build_script_generator/cmake/resources/ci_CMakeLists.txt.in b/tools/build_script_generator/cmake/resources/ci_CMakeLists.txt.in
index cf68aeea18..4d44b499cd 100644
--- a/tools/build_script_generator/cmake/resources/ci_CMakeLists.txt.in
+++ b/tools/build_script_generator/cmake/resources/ci_CMakeLists.txt.in
@@ -41,6 +41,11 @@ set(CMAKE_OBJDUMP ${TOOLCHAIN_PREFIX}-objdump)
 set(CMAKE_AR ${TOOLCHAIN_PREFIX}-gcc-ar)
 set(CMAKE_NM ${TOOLCHAIN_PREFIX}-gcc-nm)
 
+SET(CMAKE_C_ARCHIVE_CREATE   "<CMAKE_AR> qcs <TARGET> <LINK_FLAGS> <OBJECTS>")
+SET(CMAKE_C_ARCHIVE_FINISH   ":")
+SET(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> qcs <TARGET> <LINK_FLAGS> <OBJECTS>")
+SET(CMAKE_CXX_ARCHIVE_FINISH ":")
+
 project({{ project_name }} CXX C)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)