diff --git a/hw/bsp/board.c b/hw/bsp/board.c
index 562792625..23b4b6628 100644
--- a/hw/bsp/board.c
+++ b/hw/bsp/board.c
@@ -44,13 +44,12 @@
 
 // If using SES IDE, use the Syscalls/SEGGER_RTT_Syscalls_SES.c instead
 #if !(defined __SES_ARM) && !(defined __SES_RISCV) && !(defined __CROSSWORKS_ARM)
-
 #include "SEGGER_RTT.h"
 
-TU_ATTR_USED int sys_write(int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write(int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   SEGGER_RTT_Write(0, (const char *) buf, (int) count);
-  return count;
+  return (int) count;
 }
 
 TU_ATTR_USED int sys_read(int fhdl, char *buf, size_t count) {
@@ -63,10 +62,9 @@ TU_ATTR_USED int sys_read(int fhdl, char *buf, size_t count) {
 
 #elif defined(LOGGER_SWO)
 // Logging with SWO for ARM Cortex
-
 #include "board_mcu.h"
 
-TU_ATTR_USED int sys_write (int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write (int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   uint8_t const* buf8 = (uint8_t const*) buf;
 
@@ -87,7 +85,7 @@ TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count) {
 #else
 
 // Default logging with on-board UART
-TU_ATTR_USED int sys_write (int fhdl, const void *buf, size_t count) {
+TU_ATTR_USED int sys_write (int fhdl, const char *buf, size_t count) {
   (void) fhdl;
   return board_uart_write(buf, (int) count);
 }
@@ -100,6 +98,16 @@ TU_ATTR_USED int sys_read (int fhdl, char *buf, size_t count) {
 
 #endif
 
+//TU_ATTR_USED int _close(int fhdl) {
+//  (void) fhdl;
+//  return 0;
+//}
+
+//TU_ATTR_USED int _fstat(int file, struct stat *st) {
+//  memset(st, 0, sizeof(*st));
+//  st->st_mode = S_IFCHR;
+//}
+
 int board_getchar(void) {
   char c;
   return (sys_read(0, &c, 1) > 0) ? (int) c : (-1);
diff --git a/hw/bsp/family_support.cmake b/hw/bsp/family_support.cmake
index eec42160e..930237fea 100644
--- a/hw/bsp/family_support.cmake
+++ b/hw/bsp/family_support.cmake
@@ -201,6 +201,9 @@ function(family_configure_common TARGET RTOS)
   # Generate linker map file
   if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     target_link_options(${TARGET} PUBLIC "LINKER:-Map=$<TARGET_FILE:${TARGET}>.map")
+    if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 12.0)
+      target_link_options(${TARGET} PUBLIC "LINKER:--no-warn-rwx-segments")
+    endif ()
   endif()
 
   # ETM Trace option
@@ -289,13 +292,11 @@ function(family_configure_device_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
 endfunction()
 
-
 # Configure host example with RTOS
 function(family_configure_host_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
 endfunction()
 
-
 # Configure host + device example with RTOS
 function(family_configure_dual_usb_example TARGET RTOS)
   family_configure_example(${TARGET} ${RTOS})
diff --git a/hw/bsp/nrf/family.cmake b/hw/bsp/nrf/family.cmake
index 99d9ac6dd..8cee2b433 100644
--- a/hw/bsp/nrf/family.cmake
+++ b/hw/bsp/nrf/family.cmake
@@ -84,9 +84,7 @@ function(add_board_target BOARD_TARGET)
         # linker file
         "LINKER:--script=${LD_FILE_GNU}"
         -L${NRFX_DIR}/mdk
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
+        --specs=nosys.specs --specs=nano.specs
         )
     elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
       target_link_options(${BOARD_TARGET} PUBLIC
diff --git a/hw/bsp/nrf/family.mk b/hw/bsp/nrf/family.mk
index df22477df..29802dc37 100644
--- a/hw/bsp/nrf/family.mk
+++ b/hw/bsp/nrf/family.mk
@@ -12,6 +12,9 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_NRF5X \
   -DCONFIG_GPIO_AS_PINRESET
 
+#CFLAGS += -nostdlib
+#CFLAGS += -D__START=main
+
 # suppress warning caused by vendor mcu driver
 CFLAGS += \
   -Wno-error=undef \
diff --git a/hw/bsp/stm32h7/family.cmake b/hw/bsp/stm32h7/family.cmake
index c08857a50..2d6ec76c8 100644
--- a/hw/bsp/stm32h7/family.cmake
+++ b/hw/bsp/stm32h7/family.cmake
@@ -66,9 +66,7 @@ function(add_board_target BOARD_TARGET)
       target_link_options(${BOARD_TARGET} PUBLIC
         "LINKER:--script=${LD_FILE_GNU}"
         -nostartfiles
-        # nanolib
-        --specs=nosys.specs
-        --specs=nano.specs
+        --specs=nosys.specs --specs=nano.specs
         )
     elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
       target_link_options(${BOARD_TARGET} PUBLIC
diff --git a/src/osal/osal_none.h b/src/osal/osal_none.h
index 76e77c25d..a07d39828 100644
--- a/src/osal/osal_none.h
+++ b/src/osal/osal_none.h
@@ -24,11 +24,11 @@
  * This file is part of the TinyUSB stack.
  */
 
-#ifndef _TUSB_OSAL_NONE_H_
-#define _TUSB_OSAL_NONE_H_
+#ifndef TUSB_OSAL_NONE_H_
+#define TUSB_OSAL_NONE_H_
 
 #ifdef __cplusplus
- extern "C" {
+extern "C" {
 #endif
 
 //--------------------------------------------------------------------+
@@ -43,39 +43,34 @@ TU_ATTR_WEAK void osal_task_delay(uint32_t msec);
 //--------------------------------------------------------------------+
 // Binary Semaphore API
 //--------------------------------------------------------------------+
-typedef struct
-{
+typedef struct {
   volatile uint16_t count;
-}osal_semaphore_def_t;
+} osal_semaphore_def_t;
 
 typedef osal_semaphore_def_t* osal_semaphore_t;
 
-TU_ATTR_ALWAYS_INLINE static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef) {
   semdef->count = 0;
   return semdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr) {
   (void) in_isr;
   sem_hdl->count++;
   return true;
 }
 
 // TODO blocking for now
-TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_wait (osal_semaphore_t sem_hdl, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_wait(osal_semaphore_t sem_hdl, uint32_t msec) {
   (void) msec;
 
-  while (sem_hdl->count == 0) { }
+  while (sem_hdl->count == 0) {}
   sem_hdl->count--;
 
   return true;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl) {
   sem_hdl->count = 0;
 }
 
@@ -90,19 +85,16 @@ typedef osal_semaphore_t osal_mutex_t;
 // Note: multiple cores MCUs usually do provide IPC API for mutex
 // or we can use std atomic function
 
-TU_ATTR_ALWAYS_INLINE static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef) {
   mdef->count = 1;
   return mdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec) {
   return osal_semaphore_wait(mutex_hdl, msec);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl) {
   return osal_semaphore_post(mutex_hdl, false);
 }
 
@@ -119,11 +111,10 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hd
 //--------------------------------------------------------------------+
 #include "common/tusb_fifo.h"
 
-typedef struct
-{
-  void (*interrupt_set)(bool);
+typedef struct {
+  void (* interrupt_set)(bool);
   tu_fifo_t ff;
-}osal_queue_def_t;
+} osal_queue_def_t;
 
 typedef osal_queue_def_t* osal_queue_t;
 
@@ -136,27 +127,23 @@ typedef osal_queue_def_t* osal_queue_t;
   }
 
 // lock queue by disable USB interrupt
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl) {
   // disable dcd/hcd interrupt
   qhdl->interrupt_set(false);
 }
 
 // unlock queue
-TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl) {
   // enable dcd/hcd interrupt
   qhdl->interrupt_set(true);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef)
-{
+TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef) {
   tu_fifo_clear(&qdef->ff);
   return (osal_queue_t) qdef;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec) {
   (void) msec; // not used, always behave as msec = 0
 
   _osal_q_lock(qhdl);
@@ -166,8 +153,7 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, v
   return success;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const * data, bool in_isr)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const* data, bool in_isr) {
   if (!in_isr) {
     _osal_q_lock(qhdl);
   }
@@ -179,19 +165,17 @@ TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void
   }
 
   TU_ASSERT(success);
-
   return success;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_empty(osal_queue_t qhdl)
-{
+TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_empty(osal_queue_t qhdl) {
   // Skip queue lock/unlock since this function is primarily called
   // with interrupt disabled before going into low power mode
   return tu_fifo_empty(&qhdl->ff);
 }
 
 #ifdef __cplusplus
- }
+}
 #endif
 
-#endif /* _TUSB_OSAL_NONE_H_ */
+#endif
diff --git a/tools/cmake/toolchain/arm_gcc.cmake b/tools/cmake/toolchain/arm_gcc.cmake
index cefa9d2ce..7680d75ab 100644
--- a/tools/cmake/toolchain/arm_gcc.cmake
+++ b/tools/cmake/toolchain/arm_gcc.cmake
@@ -29,7 +29,7 @@ list(APPEND TOOLCHAIN_COMMON_FLAGS
   -fno-strict-aliasing
   )
 
-set(TOOLCHAIN_EXE_LINKER_FLAGS
+list(APPEND TOOLCHAIN_EXE_LINKER_FLAGS
   -Wl,--print-memory-usage
   -Wl,--gc-sections
   -Wl,--cref