Set main thread stack size as 3K for constrained targets

Author: Deepika

targets/TARGET_NUVOTON/mbed_rtx.h

@@ -45,6 +45,13 @@
     #error "no toolchain defined"
 #endif
 
+#if defined(TARGET_NANO100)
+#ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#endif
+#define MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE 3072
+#endif
+
 #endif  // TARGET_NUVOTON
 
 #endif  // MBED_MBED_RTX_H

targets/TARGET_STM/mbed_rtx.h

@@ -137,4 +137,11 @@ extern uint32_t               __HeapLimit[];
 #define ISR_STACK_SIZE        ((uint32_t)((uint32_t)__StackTop - (uint32_t)__StackLimit))
 #endif
 
+#if (defined(TARGET_STM32F070RB) || defined(TARGET_STM32F072RB))
+#ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#endif
+#define MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE 3072
+#endif
+
 #endif  // MBED_MBED_RTX_H

targets/TARGET_TOSHIBA/mbed_rtx.h

@@ -22,6 +22,10 @@
 #ifndef INITIAL_SP
 #define INITIAL_SP                        (0x20004000UL)
 #endif
+#ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#endif
+#define MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE 3072
 
 #endif
 
@@ -30,6 +34,10 @@
 #ifndef INITIAL_SP
 #define INITIAL_SP                        (0x20080000UL)
 #endif
+#ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
+#endif
+#define MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE 3072
 
 #endif