Use official toolchain defines

targets/TARGET_STM/TARGET_STM32L4/l4_retarget.c

@@ -32,9 +32,7 @@
   *
   ******************************************************************************  
   */ 
-#if defined(TWO_RAM_REGIONS)
-#if defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_GCC_CR)
-
+#if (defined(TWO_RAM_REGIONS) && defined(__GNUC__) && !defined(__CC_ARM))
 #include <errno.h>
 #include "stm32l4xx.h"
 extern uint32_t __mbed_sbrk_start;
@@ -64,5 +62,5 @@ void *__wrap__sbrk(int incr)
     
     return (void *) heap_ind_old;
 }
-#endif /* GCC_ARM toolchain */
-#endif /* TWO_RAM_REGIONS */
+#endif /* GCC_ARM toolchain && TWO_RAM_REGIONS*/
+

targets/TARGET_STM/mbed_rtx.h

@@ -20,8 +20,10 @@
 #ifndef INITIAL_SP
 
 #if (defined(TARGET_STM32L475VG))
-/* only GCC_ARM and IAR toolchain have the stack on SRAM2 */
-#if (defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_GCC_CR) || defined(__IAR_SYSTEMS_ICC__ ))
+/* only GCC_ARM and IAR toolchains have the stack on SRAM2 */
+#if (((defined(__GNUC__) && !defined(__CC_ARM)) ||\
+       defined(__IAR_SYSTEMS_ICC__ )) &&\
+       defined(TWO_RAM_REGIONS))
 #define INITIAL_SP              (0x10008000UL)
 #else
 #define INITIAL_SP              (0x20018000UL)
@@ -117,7 +119,7 @@
 #endif
 
 #endif // INITIAL_SP
-#if defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_GCC_CR)
+#if (defined(__GNUC__) && !defined(__CC_ARM))
     extern uint32_t               __StackLimit[];
     extern uint32_t               __StackTop[];
     extern uint32_t               __end__[];
@@ -126,8 +128,6 @@
     #define HEAP_SIZE             ((uint32_t)((uint32_t)__HeapLimit - (uint32_t)HEAP_START))
     #define ISR_STACK_START       ((unsigned char*)__StackLimit)
     #define ISR_STACK_SIZE        ((uint32_t)((uint32_t)__StackTop - (uint32_t)__StackLimit))
-#elif defined(__ICCARM__)
-    /* No region declarations needed */
 #endif
 
 #endif  // MBED_MBED_RTX_H