Ubuntu14.04下编译工具再root下不能使用解决办法

为了方便编译，一般情况下安装交叉编译工具链的属性都是在

/opt/目录下

有时在用户空间使用的编译命令没问题，切换到root后就提示没有改命令；

是因为不同用户加载的环境变量配置脚本不同；

Ubuntu14.04下用户空间的配置脚本是：

查看该脚本内容

# ~/.bashrc: executed by bash(1) for non-login shells.

# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)

# for examples

# If not running interactively, don't do anything

case $- in

    *i*) ;;

      *) return;;

esac

# don't put duplicate lines or lines starting with space in the history.

# See bash(1) for more options

HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it

shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)

HISTSIZE=1000

HISTFILESIZE=2000

# check the window size after each command and, if necessary,

# update the values of LINES and COLUMNS.

shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will

# match all files and zero or more directories and subdirectories.

#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)

[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)

if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then

    debian_chroot=$(cat /etc/debian_chroot)

fi

# set a fancy prompt (non-color, unless we know we "want" color)

case "$TERM" in

    xterm-color) color_prompt=yes;;

esac

# uncomment for a colored prompt, if the terminal has the capability; turned

# off by default to not distract the user: the focus in a terminal window

# should be on the output of commands, not on the prompt

#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then

    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
# We have color support; assume it's compliant with Ecma-48
# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
# a case would tend to support setf rather than setaf.)
color_prompt=yes

    else
color_prompt=

    fi

fi

if [ "$color_prompt" = yes ]; then

    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '

else

    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '

fi

unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir

case "$TERM" in

xterm*|rxvt*)

    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"

    ;;

*)

    ;;

esac

# enable color support of ls and also add handy aliases

if [ -x /usr/bin/dircolors ]; then

    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"

    alias ls='ls --color=auto'

    #alias dir='dir --color=auto'

    #alias vdir='vdir --color=auto'

    alias grep='grep --color=auto'

    alias fgrep='fgrep --color=auto'

    alias egrep='egrep --color=auto'

fi

# some more ls aliases

alias ll='ls -alF'

alias la='ls -A'

alias l='ls -CF'

# Add an "alert" alias for l
4000
ong running commands.  Use like so:

#   sleep 10; alert

alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

# Alias definitions.

# You may want to put all your additions into a separate file like

# ~/.bash_aliases, instead of adding them here directly.

# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then

    . ~/.bash_aliases

fi

# enable programmable completion features (you don't need to enable

# this, if it's already enabled in /etc/bash.bashrc and /etc/profile

# sources /etc/bash.bashrc).

if ! shopt -oq posix; then

  if [ -f /usr/share/bash-completion/bash_completion ]; then

    . /usr/share/bash-completion/bash_completion

  elif [ -f /etc/bash_completion ]; then

    . /etc/bash_completion

  fi

fi

#export PATH=/usr/local/Trolltech/QtEmbedded-4.6.3-arm/bin:${PATH} 

#export PATH=/usr/local/Trolltech/Qt-4.8.1/bin:${PATH} 

export PATH=/opt/allwiner_compiler/external-toolchain/bin:${PATH} 

export PATH=$PATH:/opt/ingenic_compiler/mips-gcc472-glibc216/bin 

export OPENCV_DEPEND=/usr/local/mips/opencv-depend 

export OPENCV_INSTALL=/usr/local/mips/opencv-install

最后的export是为了交叉编译自己加上去的，

尤其是这一句

export PATH=$PATH:/opt/ingenic_compiler/mips-gcc472-glibc216/bin

可以让用户使用自己的命令；

而在root下不能使用命令就是没有把该路径添加到root用户的脚本中；

刚才说了不同用户的变量脚本是不一样的；

root用户的变量脚本是

查看该脚本，最后是没有

export PATH=/work/tools/gcc-3.4.5-glibc-2.3.6/bin:${PATH}

export PATH=$PATH:/opt/ingenic_compiler/mips-gcc472-glibc216/bin 

export OPENCV_DEPEND=/usr/local/mips/opencv-depend 

export OPENCV_INSTALL=/usr/local/mips/opencv-install

这几行的，把这几行加上去就行了。

最后使其生效

source /root/.bashrc