Rename MG_ARCH_NEWLIB -> MG_ARCH_ARM_GCC

src/arch.h

@@ -8,7 +8,7 @@
 #define MG_ARCH_FREERTOS 5      // FreeRTOS
 #define MG_ARCH_THREADX 6       // Eclipse ThreadX (former MS Azure RTOS)
 #define MG_ARCH_ZEPHYR 7        // Zephyr RTOS
-#define MG_ARCH_NEWLIB 8        // Bare metal ARM
+#define MG_ARCH_ARMGCC 8        // Plain ARM GCC
 #define MG_ARCH_CMSIS_RTOS1 9   // CMSIS-RTOS API v1 (Keil RTX)
 #define MG_ARCH_TIRTOS 10       // Texas Semi TI-RTOS
 #define MG_ARCH_PICOSDK 11      // Raspberry Pi Pico-SDK (RP2040, RP2350)
@@ -17,6 +17,8 @@
 #define MG_ARCH_RTTHREAD 14     // RT-Thread RTOS
 #define MG_ARCH_ARMCGT 15       // Texas Semi ARM-CGT
 
+#define MG_ARCH_NEWLIB MG_ARCH_ARMGCC  // Alias, deprecate in 2025
+
 #if !defined(MG_ARCH)
 #if defined(__unix__) || defined(__APPLE__)
 #define MG_ARCH MG_ARCH_UNIX
@@ -39,7 +41,7 @@
 #include "arch_esp32.h"
 #include "arch_esp8266.h"
 #include "arch_freertos.h"
-#include "arch_newlib.h"
+#include "arch_armgcc.h"
 #include "arch_rtx.h"
 #include "arch_unix.h"
 #include "arch_win32.h"

src/arch_armgcc.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#if MG_ARCH == MG_ARCH_NEWLIB
+#if MG_ARCH == MG_ARCH_ARMGCC
 #define _POSIX_TIMERS
 
 #include <ctype.h>