AC6下编译NXP S32K146报错

[arcrong]

最近在使用S32K146芯片，移植过程遇到些问题。开发环境：KEILV5.36 + AC6。
1. 需要自行定义__CLANG_ARM这个宏？
S32K146仅支持AC6编译器。但从AC6的用户手册上查不到有预定义__CLANG_ARM这个宏，而是定义了__GNUC__这个宏。AC6本身是兼容GCC语法的。
我不太清楚这个宏是从哪来的？是否需要自行定义？

2. 自行添加__CLANG_ARM后，编译报错，这个需要怎么改动？
我的修改：
/* C stack block name, default is STACK */
#define CMB_CSTACK_BLOCK_NAME ARM_LIB_STACK

/* code section name, default is ER_IROM1 */
#define CMB_CODE_SECTION_NAME m_text
报错：
.\app.axf: Error: L6218E: Undefined symbol Image$$m_text$$Limit (referred from cm_backtrace.o).

SCT文件见附件。
Uploading S32K146_128_flash.sct…

[arcrong]

#! armclang --target=arm-arm-none-eabi -mcpu=cortex-m4 -xc -E
/*

• modified by ARM
• If flash_vector_table is defined then interrupt vector table is not copied to RAM.
• If flash_vector_table is defined at link time then it must also be defined for
• assembling startup_14*.s
  /
  /
  ** ###################################################################
  ** Processor: S32K146 with 128 KB SRAM
  ** Compiler: ARM Compiler
  **
  ** Abstract:
  ** Linker file for the ARM Compiler
  **
  ** Copyright (c) 2015-2016 Freescale Semiconductor, Inc.
  ** Copyright 2017 NXP
  ** All rights reserved.
  **
  ** NXP Confidential. This software is owned or controlled by NXP and may only be
  ** used strictly in accordance with the applicable license terms. By expressly
  ** accepting such terms or by downloading, installing, activating and/or otherwise
  ** using the software, you are agreeing that you have read, and that you agree to
  ** comply with and are bound by, such license terms. If you do not agree to be
  ** bound by the applicable license terms, then you may not retain, install,
  ** activate or otherwise use the software. The production use license in
  ** Section 2.3 is expressly granted for this software.
  **
  ** http: www.nxp.com
  **
  ** ###################################################################
  */

#if (defined(flash_vector_table))
#define ram_vector_table_size 0x00000000
#else
#define ram_vector_table_size 0x00000400
#endif

#define m_interrupts_start 0x00000000
#define m_interrupts_size 0x00000400

#define m_flash_config_start 0x00000400
#define m_flash_config_size 0x00000010

#define m_text_start 0x00000410
#define m_text_size 0x000FFBF0

#define m_interrupts_ram_start 0x1FFF0000
#define m_interrupts_ram_size ram_vector_table_size

#define m_data_start 0x1FFF0000 + ram_vector_table_size
#define m_data_size 0x00010000 - ram_vector_table_size

#define m_data_2_start 0x20000000
#define m_data_2_size 0x0000F000

/* Sizes */
#if (defined(stack_size))
#define Stack_Size stack_size
#else
#define Stack_Size 0x0400
#endif

#if (defined(heap_size))
#define Heap_Size heap_size
#else
#define Heap_Size 0x0400
#endif

LR_m_text m_interrupts_start m_text_start+m_text_size-m_interrupts_start { ; load region size_region
VECTOR_ROM m_interrupts_start m_interrupts_size { ; load address = execution address
startup_S32K1*.o (RESET +First)
}

#if (defined(flash_vector_table))
VECTOR_RAM m_interrupts_start EMPTY 0 {
}
#else
VECTOR_RAM m_interrupts_ram_start EMPTY m_interrupts_ram_size {
}
#endif

ER_m_flash_config m_flash_config_start FIXED m_flash_config_size { ; load address = execution address
* (FlashConfig)
}

ER_m_text_const m_text_start { ; load address = execution address
.ANY (+RO-DATA)
}

ER_m_text +0 m_text_size { ; load address = execution address
* (InRoot$$Sections)
.ANY (+RO)
}

RW_m_data m_data_start { ; RW data
.ANY (+RW-DATA)
}

RW_m_code +0 m_data_size { ; RW data
.ANY (.code_ram)
}

/* Custom Section Block that can be used to place data at absolute address. /
/ Use attribute((section (".customSection"))) to place data here. /
RW_m_custom_section m_data_2_start ALIGN 0x4 {
.ANY (.customSection) / Keep section even if not referenced. */
}

RW_m_data_2 +0 m_data_2_size-Stack_Size-Heap_Size { ; RW data
.ANY (+ZI)
}

ARM_LIB_HEAP ((ImageLimit(RW_m_data_2) == m_data_2_start) ? m_data_2_start : +0) EMPTY Heap_Size { ; Heap region growing up
}

ARM_LIB_STACK m_data_2_start+m_data_2_size EMPTY -Stack_Size { ; Stack region growing down
}
}