解决Python交叉编译后，键盘方向键乱码的问题

参考

http://www.alliedjeep.com/38071.htm

https://www.zhihu.com/question/21518507

http://professor.blog.51cto.com/996189/1618390/

概述

前面几篇博文介绍了Python交叉编译到ARM开发板上面，在使用的时候遇到一个问题，就是当按下键盘上面的方向键的时候看到的都是乱码。

平台

主机： ubuntu14.04 64bit

开发板： qemu + aarch64 （参考： http://www.cnblogs.com/pengdonglin137/p/6442583.html）

工具链： aarch64-linux-gnu-gcc  (gcc version 4.9.1 20140529)  用于编译aarch64上面运行的程序

Python版本： Python-3.6.0 和 Python-2.7.13

解决

1、下载readline和termcap的源码

• readline的下载链接：

http://files.cnblogs.com/files/pengdonglin137/readline-7.0.tar.gz

或者 http://ftp.gnu.org/gnu/readline/readline-7.0.tar.gz

• termcap的下载链接：

http://files.cnblogs.com/files/pengdonglin137/termcap-1.3.1.tar.gz

或者 http://ftp.gnu.org/gnu/termcap/termcap-1.3.1.tar.gz

2、交叉编译

• readline

解压：

 tar -xf readline-7.0.tar.gz
 mkdir aarch64
 cd aarch64

配置、编译和安装 mk.sh：

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 ../readline-7.0/configure --host=aarch64-linux-gnu \
     --prefix=`pwd`

 make -j4
 make install

• termcap

termcap编译稍微麻烦一点，需要手动修改configure生成的Makefile文件。

解压：

 tar -xf termcap-1.3..tar.gz
 mkdir aarch64
 cd aarch64

配置 mk1_conf.sh：

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 ../termcap-1.3./configure --host=aarch64-linux-gnu \
     --prefix=`pwd`

修改Makefile：

 --- Makefile.orgin    -- ::24.557379472 +
 +++ Makefile    -- ::32.749379210 +
 @@ -, +, @@
  srcdir = ../termcap-1.3.
  VPATH = ../termcap-1.3.

 -CC = gcc
 -AR = ar
 -RANLIB = ranlib
 +cross_compile = aarch64-linux-gnu-
 +
 +CC = ${cross_compile}gcc
 +AR = ${cross_compile}ar
 +RANLIB = ${cross_compile}ranlib

  INSTALL = /usr/bin/install -c
  INSTALL_DATA = ${INSTALL} -m 

即需要手动将修改工具链。

编译安装 mk2_make.sh：

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 make -j4
 make install

3、配置Python3

• 修改mk1_conf.sh， 增加readline和termcap的lib和include路径

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 ../Python-3.6./configure \
     --host=aarch64-linux-gnu \
     --build=aarch64 \
     --prefix=`pwd` \
     --enable-ipv6 \
     --enable-shared \
     ac_cv_file__dev_ptmx="yes" \
     ac_cv_file__dev_ptc="no" \
     LDFLAGS="-L/home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch64/lib \
     -L/home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch64/lib \
     -L/home/pengdonglin/src/qemu/python_cross_compile/Termcap/aarch64/lib" \
     CPPFLAGS="-I/home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch64/include \
     -I/home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch64/include \
     -I/home/pengdonglin/src/qemu/python_cross_compile/Termcap/aarch64/include"

修改完成之后，执行mk1_conf.sh

• 修改该Module/Setup文件

 --- Setup.origin    -- ::52.609370903 +
 +++ Setup    -- ::46.781457397 +
 @@ -, +, @@
  # it, depending on your system -- see the GNU readline instructions.
  # It's okay for this to be a shared library, too.

 -#readline readline.c -lreadline -ltermcap
 +readline readline.c -lreadline -ltermcap

  # Modules that should always be present (non UNIX dependent)

即将readline这一行取消注释

• 编译安装 mk2_make.sh

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 make -j4
 make install

4、配置Python2

Python2跟Python3的处理方法稍有不同。

• 修改mk1_conf.sh， 增加readline和termcap的lib和include路径

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin:$PATH

 ../Python-2.7./configure --prefix=`pwd` \
     --host=arm-none-linux-gnueabi \
     --build=x86_64-linux-gnu \
     --enable-ipv6 \
     --enable-shared \
     ac_cv_file__dev_ptmx="yes" \
     ac_cv_file__dev_ptc="no" \
     LDFLAGS="-L/home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch32/lib \
     -L/home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch32/lib \
     -L/home/pengdonglin/src/qemu/python_cross_compile/Termcap/aarch32/lib" \
     CPPFLAGS="-I/home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch32/include \
     -I/home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch32/include \
     -I/home/pengdonglin/src/qemu/python_cross_compile/Termcap/aarch32/include" \
     LDLAST="-L/home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch32/lib \
     -L/home/pengdonglin/src/qemu/python_cross_compile/Termcap/aarch32/lib"

跟Python3一样，添加readline和termcap的include和lib路径， 此外，还需要手动修改LDLAST的值，将readline和termcap的lib的路径添加到其中，否则在编译的时候会提示找不到l-lreadline和-ltermcap，然后执行./mk1_conf.sh

• 修改Modules/Setup

 --- Setup.orig    -- ::37.121275501 +
 +++ Setup    -- ::11.845441252 +
 @@ -, +, @@
  # it, depending on your system -- see the GNU readline instructions.
  # It's okay for this to be a shared library, too.

 -#readline readline.c -lreadline -ltermcap
 +readline readline.c -lreadline -ltermcap

  # Modules that should always be present (non UNIX dependent): 

• 编译 mk2_make.sh

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 make HOSTPYTHON=../x86_64/python \
     HOSTPGEN=../x86_64/Parser/pgen \
     BLDSHARED="aarch64-linux-gnu-gcc -shared" \
     CROSS_COMPILE=aarch64-linux-gnu- \
     CROSS_COMPILE_TARGET=yes \
     HOSTARCH=aarch64-linux-gnu \
     BUILDARCH=x86_64-linux-gnu \
     -j4

• 安装 mk3_install.sh

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 make install HOSTPYTHON=../x86_64/python \
     BLDSHARED="aarch64-linux-gnu-gcc -shared" \
     CROSS_COMPILE=arm-none-linux-gnueabi- \
     CROSS_COMPILE_TARGET=yes \
     prefix=`pwd`

5、修改制作ramdisk的脚本 mk_ramdisk.sh

 #!/bin/bash

 export PATH=/home/pengdonglin/src/qemu/aarch64/gcc-linaro-aarch64-linux-gnu-4.9-.07_linux/bin:$PATH

 sudo rm -rf rootfs
 sudo rm -rf tmpfs
 sudo rm -rf ramdisk*

 sudo mkdir rootfs
 sudo cp ../busybox-1.24./_install/*  rootfs/ -raf

 sudo mkdir -p rootfs/proc/
 sudo mkdir -p rootfs/sys/
 sudo mkdir -p rootfs/tmp/
 sudo mkdir -p rootfs/root/
 sudo mkdir -p rootfs/var/
 sudo mkdir -p rootfs/mnt/

 sudo cp etc rootfs/ -arf
 sudo mkdir -p rootfs/lib

 sudo cp -arf ../gcc-linaro-aarch64-linux-gnu-4.9-2014.07_linux/aarch64-linux-gnu/libc/lib/aarch64-linux-gnu/* rootfs/lib/

 #python
 version=3
 sudo mkdir -p rootfs/usr
 pushd rootfs/usr
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/lib .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/include .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/bin .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/share .
 sudo aarch64-linux-gnu-strip lib/python*
 popd

 version=2
 pushd rootfs/usr
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/lib .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/include .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/bin .
 sudo cp  -raf /home/pengdonglin/src/qemu/python_cross_compile/Python${version}/aarch64/share .
 sudo aarch64-linux-gnu-strip lib/python*
 popd

 #sqlite
 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch64/bin/* rootfs/bin/
 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch64/include/* rootfs/include/
 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/SQlite/aarch64/lib/* rootfs/lib/
 sudo strip rootfs/bin/sqlite3

 #readline
 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch64/include/* rootfs/include/
 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/Readline/aarch64/lib/* rootfs/lib/

 sudo mkdir -p rootfs/dev/
 sudo mknod rootfs/dev/tty1 c 4 1
 sudo mknod rootfs/dev/tty2 c 4 2
 sudo mknod rootfs/dev/tty3 c 4 3
 sudo mknod rootfs/dev/tty4 c 4 4
 sudo mknod rootfs/dev/console c 5 1
 sudo mknod rootfs/dev/null c 1 3

 sudo rm rootfs/lib/*.a
 sudo rm rootfs/lib/*.la
 sudo aarch64-linux-gnu-strip rootfs/lib/*

 sudo mkdir -p rootfs/lib/modules/4\.10\.0\+

 pushd rootfs/lib
 sudo ln -sf ld-2.19-2014.07.so ld-linux-aarch64.so.1
 popd

 sudo mkdir -p rootfs/tools
 sudo cp ./other_tools/* rootfs/tools

 sudo dd if=/dev/zero of=ramdisk bs=1M count=300
 sudo mkfs.ext4 -F ramdisk

 sudo mkdir -p tmpfs
 sudo mount -t ext4 ramdisk ./tmpfs/  -o loop
 sudo cp -raf rootfs/*  tmpfs/
 sudo umount tmpfs

 sudo gzip --best -c ramdisk > ramdisk.gz
 sudo mkimage -n "ramdisk" -A arm -O linux -T ramdisk -C gzip -d ramdisk.gz ramdisk.img

这里我把Python3和Python2都拷贝到板子上面了， 同时别忘了拷贝readline和termcap的lib和include。如果提示空间不够的话，修改第75行的count的数值，这个要不能大于kernel里配置的值。

6、验证

经测试，在板子板子上面使用python3或者python2的时候，按键盘的方向键不会乱码。

完。

修改Modules/Setup