ns115 step by step

一，安装环境：

　　sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32z1 lib32ncurses5 lib32bz2-1.0 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32readline-gplv2-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc ctags cscope

二，测试编译：

1、用gedit或其它文本编辑器创建下述test.c文件

//file name: test.c

#include<stdio.h>

      int main()
      {
        printf("Hello world\n");
        return 0;
      }

2、用gcc编译器编译

gcc -o test test.c

3、试运行编译好的文件，如果输出Hello Ubuntu!,说明系统可以编译c程序。

./test

三，查看编译工具版本信息：　　

$ gcc --version
gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2

$ g++ --version
g++ (Ubuntu 4.8.2-19ubuntu1) 4.8.2

$ gdb --version
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1

四，ubuntu14.04 64bit 安装交叉编译环境不识别

　　解压，设置好环境变量后，#arm-none-linux-gnueabi-gcc -v 提示找不到编译器，原因是编译器是32bit的，而装的是64bit系统。

　　google后说要装ia32-libs,（http://andycoder.me/fix-32bug-under-ubuntu1404/）

　　但却一直装不上，终端提示替代品：lib32z1 lib32ncurses5 lib32bz2-1.0

　　安装完这三个替代品后，就可以识别交叉编译器了。

五，编译xloader出错

/home/oee/arm-tool/arm-2009q1/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/libgcc.a(_dvmd_lnx.o): In function `__aeabi_ldiv0':
(.text+0x8): undefined reference to `raise'
make: *** [x-load] Error 1

http://www.crifan.com/uboot_cross_compile_gcc_config_arm_lib1funcs_asm_undefined_reference_to_raise/

解决办法两种：

1.去用其他对应的配置（估计是用于指定是非GUN/Linux类程序的），重新编译一个新版本的交叉编译器，然后用新的非GNU/Linux的交叉编译器，去编译此旧版本的uboot，即可正常编译

2.修改自己的uboot，加上对应的（随便写个空的）__aeabi_ldiv0或raise函数即可。

此处选用第二种，具体做法：

此处的uboot是whgs的（即配置的时候用的是make whgs_config）

所以找到对应的汇编文件，即：

board/whgs/lowlevel_init.S

在文件最后，添加上

@add empty raise() to fix (when use new EABI xscale cross compiler to) compile
@error gcc/config/arm/lib1funcs.asm:1266: undefined reference to `raise'
.globl raise
raise:
	nop
	mov	pc, lr

然后重新编译，即可。

六，编译android时报错

oee@copener:/opt/ns115_jb/android$ make clean
/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.6/bin/arm-linux-androideabi-gcc: Permission denied
/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.6/bin/arm-linux-androideabi-gcc: Permission denied
/bin/bash: prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.6/bin/arm-linux-androideabi-gcc: Permission denied
/bin/bash: build/core/find-jdk-tools-jar.sh: Permission denied
build/core/config.mk:342: *** Error: could not find jdk tools.jar, please install JDK6, which you can download from java.sun.com. Stop.

　　代码复制过来，权限有问题

　　$chmod -R 700 android/

七，JDK版本不对应

oee@copener:/opt/ns115_jb/android$ make clean
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=4.2
TARGET_PRODUCT=full
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a
HOST_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux---generic-x86_64-with-Ubuntu-14.04-trusty
HOST_BUILD_TYPE=release
BUILD_ID=JOP40C
OUT_DIR=out
============================================
Checking build tools versions...
************************************************************
You are attempting to build with the incorrect version
of java.

Your version is: java version "1.8.0_40".
The correct version is: Java SE 1.6.

Please follow the machine setup instructions at
    https://source.android.com/source/download.html
************************************************************
build/core/main.mk:: *** stop.  Stop.
oee@copener:/opt/ns115_jb/android$ 

查找除错代码：

$ vim Makefile

发现调用的是main.mk

$ vim build/core/main.mk

# Check for the correct version of java
java_version := $(shell java -version >& |  | grep '^java .*[ "]1\.6[\. "$$]')
ifneq ($(shell java -version >& | grep -i openjdk),)
java_version :=
endif
ifeq ($(strip $(java_version)),)
$(info ************************************************************)
$(info You are attempting to build with the incorrect version)
$(info of java.)
$(info $(space))
$(>& | ).)
$(info The correct version is: Java SE 1.6.)
$(info $(space))
$(info Please follow the machine setup instructions at)
$(info $(space)$(space)$(space)$(space)https://source.android.com/source/download.html)
$(info ************************************************************)
$(error stop)
endif

# Check for the correct version of javac
javac_version := $(shell javac -version >& |  | grep '[ "]1\.6\. "$$]')
ifeq ($(strip $(javac_version)),)
$(info ************************************************************)
$(info You are attempting to build with the incorrect version)
$(info of javac.)
$(info $(space))
$(>& | ).)
$(info The correct version is: 1.6.)
$(info $(space))
$(info Please follow the machine setup instructions at)
$(info $(space)$(space)$(space)$(space)https://source.android.com/source/download.html)
$(info ************************************************************)
$(error stop)
endif

把版本号改一下

# Check for the correct version of java
java_version := $(shell java -version >& |  | grep '^java .*[ "]1\.8[\. "$$]')
ifneq ($(shell java -version >& | grep -i openjdk),)
java_version :=
endif
ifeq ($(strip $(java_version)),)
$(info ************************************************************)
$(info You are attempting to build with the incorrect version)
$(info of java.)
$(info $(space))
$(>& | ).)
$(info The correct version is: Java SE 1.6.)
$(info $(space))
$(info Please follow the machine setup instructions at)
$(info $(space)$(space)$(space)$(space)https://source.android.com/source/download.html)
$(info ************************************************************)
$(error stop)
endif

# Check for the correct version of javac
javac_version := $(shell javac -version >& |  | grep '[ "]1\.8[\. "$$]')
ifeq ($(strip $(javac_version)),)
$(info ************************************************************)
$(info You are attempting to build with the incorrect version)
$(info of javac.)
$(info $(space))
$(>& | ).)
$(info The correct version is: 1.6.)
$(info $(space))
$(info Please follow the machine setup instructions at)
$(info $(space)$(space)$(space)$(space)https://source.android.com/source/download.html)
$(info ************************************************************)
$(error stop)
endif

版本太新，不支持

Export includes file: frameworks/base/libs/androidfw/Android.mk -- out/host/linux-x86/obj/STATIC_LIBRARIES/libandroidfw_intermediates/export_includes

make: *** Waiting for unfinished jobs....
javac: target release 1.5 conflicts with default source release 1.8

javac: target release 1.5 conflicts with default source release 1.8

javac: target release 1.5 conflicts with default source release 1.8

ERROR: build project failed

换回原来的JDK版本  1.6.0_31

八,编译android出错：

vendor/dlna/src/avahi/avahi-daemon/static-services.c::: note: expected 'char *' but argument is of type 'char const *'
vendor/dlna/src/avahi/avahi-daemon/static-services.c::: warning: passing argument  of 'load_file' discards 'const' qualifier from pointer target type [enabled by default]
vendor/dlna/src/avahi/avahi-daemon/static-services.c::: note: expected 'char *' but argument is of type 'char const *'
target thumb C: avahi-daemon <= vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c
target thumb C: avahi-daemon <= vendor/dlna/src/avahi/avahi-daemon/../avahi-client/check-nss.c
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c: In function 'sd_is_socket':
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c: In function 'sd_is_socket_inet':
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c: In function 'sd_is_socket_unix':
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c: In function 'sd_notify':
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: unused parameter 'unset_environment' [-Wunused-parameter]
vendor/dlna/src/avahi/avahi-daemon/sd-daemon.c::: warning: unused parameter 'state' [-Wunused-parameter]
target thumb C: avahi-daemon <= vendor/dlna/src/avahi/avahi-daemon/dbus-protocol.c
target thumb C: avahi-daemon <= vendor/dlna/src/avahi/avahi-daemon/dbus-util.c
target thumb C: avahi-daemon <= vendor/dlna/src/avahi/avahi-daemon/dbus-async-address-resolver.c
vendor/dlna/src/avahi/avahi-daemon/dbus-protocol.c::: fatal error: dbus/dbus.h: No such file or directory
compilation terminated.

make: *** 正在等待未完成的任务....
In ::
vendor/dlna/src/avahi/avahi-daemon/../avahi-common/dbus.h::: fatal error: dbus/dbus.h: No such file or directory
compilation terminated.
In ::
vendor/dlna/src/avahi/avahi-daemon/../avahi-common/dbus.h::: fatal error: dbus/dbus.h: No such file or directory
compilation terminated.

make: *** wait: 没有子进程。 停止。
ERROR: build project failed
oee@copener:/opt/ns115_jb/android$ 

提示：fatal error: dbus/dbus.h: No such file or directory

sudo apt-get install libexpat1-dev

sudo apt-get install libdbus-glib-1-dev

root@copener:/usr/include/dbus-1.0# cp -r dbus/ ../../include/dbus

apt-get install d-feet

apt-get install libgtk2.0-dev

apt-get install libdbus-glib-1-dev

root@copener:/usr/include/dbus-1.0# find / -name dbus-arch-deps.h

root@copener:/usr/include/dbus-1.0# cp -r /usr/lib/x86_64-linux-gnu/dbus-1.0/include/dbus/ ../../include/

root@copener:/usr/include/dbus# cp dbus-arch-deps.h ../dbus