Linux环境下构建Nordic nrf52832编译环境

• 操作系统：Ubuntu 16.03

前言

$ sudo apt install gcc-arm-none-eabi

$ sudo apt install libnewlib-arm-none-eabi

工具链的地址： /usr/bin/

参考的：https://www.linuxidc.com/Linux/2017-12/149733.htm
预备参考的：http://www.coin163.com/it/x6171555457777850401

一、安装编译环境

直接下载地址：https://launchpad.net/gcc-arm-embedded/+download

sudo apt install gcc-arm-none-eabi

查看版本：$ arm-none-eabi-gcc -v

$ arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/4.9.3/lto-wrapper
Target: arm-none-eabi
Configured with: ../src/configure --build=x86_64-linux-gnu --prefix=/usr --includedir='/usr/lib/include' --mandir='/usr/lib/share/man' --infodir='/usr/lib/share/info' --sysconfdir=/etc --localstatedir=/var --disable-silent-rules --libdir='/usr/lib/lib/x86_64-linux-gnu' --libexecdir='/usr/lib/lib/x86_64-linux-gnu' --disable-maintainer-mode --disable-dependency-tracking --mandir=/usr/share/man --enable-languages=c,c++,lto --enable-multilib --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --build=x86_64-linux-gnu --target=arm-none-eabi --with-system-zlib --with-gnu-as --with-gnu-ld --with-pkgversion=15:4.9.3+svn231177-1 --without-included-gettext --prefix=/usr/lib --infodir=/usr/share/doc/gcc-arm-none-eabi/info --htmldir=/usr/share/doc/gcc-arm-none-eabi/html --pdfdir=/usr/share/doc/gcc-arm-none-eabi/pdf --bindir=/usr/bin --libexecdir=/usr/lib --libdir=/usr/lib --disable-libstdc++-v3 --host=x86_64-linux-gnu --with-headers=no --without-newlib --with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-r CFLAGS='-g -O2 -fstack-protector-strong' CPPFLAGS=-D_FORTIFY_SOURCE=2 CXXFLAGS='-g -O2 -fstack-protector-strong' FCFLAGS='-g -O2 -fstack-protector-strong' FFLAGS='-g -O2 -fstack-protector-strong' GCJFLAGS='-g -O2 -fstack-protector-strong' LDFLAGS='-Wl,-Bsymbolic-functions -Wl,-z,relro' OBJCFLAGS='-g -O2 -fstack-protector-strong' OBJCXXFLAGS='-g -O2 -fstack-protector-strong' INHIBIT_LIBC_CFLAGS=-DUSE_TM_CLONE_REGISTRY=0 AR_FOR_TARGET=arm-none-eabi-ar AS_FOR_TARGET=arm-none-eabi-as LD_FOR_TARGET=arm-none-eabi-ld NM_FOR_TARGET=arm-none-eabi-nm OBJDUMP_FOR_TARGET=arm-none-eabi-objdump RANLIB_FOR_TARGET=arm-none-eabi-ranlib READELF_FOR_TARGET=arm-none-eabi-readelf STRIP_FOR_TARGET=arm-none-eabi-strip
Thread model: single
gcc version 4.9.3 20150529 (prerelease) (15:4.9.3+svn231177-1) 

二、下载Nordic SDK编译例子

1.修改工具链配置

目录：

/nRF5_SDK_15.2.0_9412b96/components/toolchain/gcc

编辑文件：Makefile.posix

$ vim Makefile.posix

GNU_INSTALL_ROOT := /usr/bin/
GNU_VERSION := 4.9.3
GNU_PREFIX := arm-none-eabi

2.编译例子：ble_app_uart

编译入口：

/nRF5_SDK_15.2.0_9412b96/examples/ble_peripheral/ble_app_uart/pca10040/s132/armgcc

---

很不幸，编译出错：/usr/lib/gcc/arm-none-eabi/4.9.3/include/stdint.h:9:26: fatal error: stdint.h: No such file or directory

root@liefyuan:/home/nordic/nRF5_SDK_15.2.0_9412b96/examples/ble_peripheral/ble_app_uart/pca10040/s132/armgcc# make
Compiling file: nrf_log_backend_rtt.c
In file included from ../../../../../../components/libraries/util/sdk_common.h:53:0,
                 from ../../../../../../components/libraries/log/src/nrf_log_backend_rtt.c:40:
/usr/lib/gcc/arm-none-eabi/4.9.3/include/stdint.h:9:26: fatal error: stdint.h: No such file or directory
 # include_next 
                          ^
compilation terminated.
../../../../../../components/toolchain/gcc/Makefile.common:272: recipe for target '_build/nrf52832_xxaa/nrf_log_backend_rtt.c.o' failed
make: *** [_build/nrf52832_xxaa/nrf_log_backend_rtt.c.o] Error 1

各种google找到了 https://github.com/kiibohd/controller/issues/30 说是需要安装这个：arm-none-eabi-newlib

sudo apt install arm-none-eabi-newlib

唉，还是不行一样的错误！

root@liefyuan:/home/nordic/nRF5_SDK_15.2.0_9412b96/examples/ble_peripheral/ble_app_uart/pca10040/s132/armgcc# make
Compiling file: nrf_log_backend_rtt.c
In file included from ../../../../../../components/libraries/util/sdk_common.h:53:0,
                 from ../../../../../../components/libraries/log/src/nrf_log_backend_rtt.c:40:
/usr/lib/gcc/arm-none-eabi/4.9.3/include/stdint.h:9:26: fatal error: stdint.h: No such file or directory
 # include_next 
                          ^
compilation terminated.
../../../../../../components/toolchain/gcc/Makefile.common:272: recipe for target '_build/nrf52832_xxaa/nrf_log_backend_rtt.c.o' failed
make: *** [_build/nrf52832_xxaa/nrf_log_backend_rtt.c.o] Error 1

---

曙光

在这个论坛贴文里面：https://devzone.nordicsemi.com/f/nordic-q-a/16584/stdint-h-no-such-file-or-directory 有看到（英文的海洋里面绕来绕去）Debian9.1安装的包居然是这样的：libnewlib-arm-none-eabi 我就死马当活马医了。

sudo apt install libnewlib-arm-none-eabi

MD！居然可以了。。。。

root@liefyuan:/home/nordic/nRF5_SDK_15.2.0_9412b96/examples/ble_peripheral/ble_app_uart/pca10040/s132/armgcc# make
Compiling file: nrf_log_backend_rtt.c
Compiling file: nrf_log_backend_serial.c
Compiling file: nrf_log_default_backends.c
Compiling file: nrf_log_frontend.c
Compiling file: nrf_log_str_formatter.c
Compiling file: app_button.c
Compiling file: app_error.c
Compiling file: app_error_handler_gcc.c
Compiling file: app_error_weak.c
Compiling file: app_fifo.c
Compiling file: app_scheduler.c
Compiling file: app_timer.c
Compiling file: app_uart_fifo.c
Compiling file: app_util_platform.c
Compiling file: hardfault_implementation.c
Compiling file: nrf_assert.c
Compiling file: nrf_atfifo.c
Compiling file: nrf_atflags.c
Compiling file: nrf_atomic.c
Compiling file: nrf_balloc.c
Compiling file: nrf_fprintf.c
Compiling file: nrf_fprintf_format.c
Compiling file: nrf_memobj.c
Compiling file: nrf_pwr_mgmt.c
Compiling file: nrf_ringbuf.c
Compiling file: nrf_section_iter.c
Compiling file: nrf_strerror.c
Compiling file: retarget.c
Compiling file: system_nrf52.c
Compiling file: boards.c
Compiling file: nrf_drv_clock.c
Compiling file: nrf_drv_uart.c
Compiling file: nrfx_clock.c
Compiling file: nrfx_gpiote.c
Compiling file: nrfx_power_clock.c
Compiling file: nrfx_prs.c
Compiling file: nrfx_uart.c
Compiling file: nrfx_uarte.c
Compiling file: bsp.c
Compiling file: bsp_btn_ble.c
Compiling file: main.c
Compiling file: SEGGER_RTT.c
Compiling file: SEGGER_RTT_Syscalls_GCC.c
Compiling file: SEGGER_RTT_printf.c
Compiling file: ble_advdata.c
Compiling file: ble_advertising.c
Compiling file: ble_conn_params.c
Compiling file: ble_conn_state.c
Compiling file: ble_link_ctx_manager.c
Compiling file: ble_srv_common.c
Compiling file: nrf_ble_gatt.c
Compiling file: nrf_ble_qwr.c
Compiling file: utf.c
Compiling file: ble_nus.c
Compiling file: nrf_sdh.c
Compiling file: nrf_sdh_ble.c
Compiling file: nrf_sdh_soc.c
Linking target: _build/nrf52832_xxaa.out
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-atexit.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-ctype_.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-exit.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-fini.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-impure.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-init.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-memcmp.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-memcpy.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-memset.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-printf.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-strcpy.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-strlen.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-__atexit.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-__call_atexit.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-findfp.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-fwalk.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-mallocr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-vfprintf.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-vfprintf_i.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-sbrkr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-stdio.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-wbuf.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-writer.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-wsetup.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-closer.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-fflush.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-fvwrite.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-lseekr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-makebuf.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-memchr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-memmove.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-freer.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-reallocr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-readr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-reent.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-fstatr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-isattyr.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
/usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/bin/ld: warning: /usr/lib/gcc/arm-none-eabi/4.9.3/../../../arm-none-eabi/lib/armv7e-m/fpu/libc_nano.a(lib_a-nano-msizer.o) uses 2-byte wchar_t yet the output is to use 4-byte wchar_t; use of wchar_t values across objects may fail
   text    data     bss     dec     hex filename
  38996     192    4720   43908    ab84 _build/nrf52832_xxaa.out
Preparing: _build/nrf52832_xxaa.hex
Preparing: _build/nrf52832_xxaa.bin
DONE nrf52832_xxaa

完成！

补充：

在安装了gcc-arm-none-eabi之后，无法编译我还特意写了一个helloworld.c来编译：

#include "stdio.h"

int main(void)
{
        printf("helloWorld!\r\n");
        return 0;
}

输入指令编译一下：不行！

$ arm-none-eabi-gcc -c hello.c
hello.c:1:19: fatal error: stdio.h: No such file or directory
 #include "stdio.h"
                   ^
compilation terminated.

只有在成功安装了 libnewlib-arm-none-eabi之后才编译成功。