用gcc编译出错 是否是搭建的问题
d:/programfiles/mdk/arm/gcc/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/lib/armv7e-m\libc.a(lib_a-init.o): In function `__libc_init_array':
init.c.text.__libc_init_array+0x22): undefined reference to `_init'
collect2.exe: error: ld returned 1 exit status