v1.7 编译内核和写驱动例子遇到问题

1、编译内核

/usr/bin/ld: scripts/dtc/dtc-parser.tab.o:(.bss+0x50): multiple definition of `yylloc'; scripts/dtc/dtc-lexer.lex.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [scripts/Makefile.host:100：scripts/dtc/dtc] 错误 1
make[1]: *** [scripts/Makefile.build:403：scripts/dtc] 错误 2

./scripts/dtc/dtc-lexer.lex.c:640:YYLTYPE yylloc;

前面加上 extern

2、

编译驱动例子报错

https://blog.csdn.net/qq_44933518/article/details/105881723

wang@wang-ubu22:~/program/driversimxv1.7/03_newchrled$ vi Makefile
wang@wang-ubu22:~/program/driversimxv1.7/03_newchrled$ make
make -C /home/wang/program/l/vlinux-imx-4.1.15-2.1.0-g3dc0a4b-v2.7 M=/home/wang/program/driversimxv1.7/03_newchrled modules
make[1]: 进入目录“/home/wang/program/l/vlinux-imx-4.1.15-2.1.0-g3dc0a4b-v2.7”
  CC [M]  /home/wang/program/driversimxv1.7/03_newchrled/newchrled.o
cc1: error: code model kernel does not support PIC mode

3、

 https://blog.csdn.net/qq_42230338/article/details/117920537

#ARCH        ?= $(SUBARCH)
#CROSS_COMPILE    ?= $(CONFIG_CROSS_COMPILE:"%"=%)
ARCH        ?= arm
CROSS_COMPILE    ?= arm-linux-gnueabihf-

估计编译模块的时候要去搜Makefile吧

而默认是通过命令传参的  make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- all -j16