Developer guide:Development environment for C/C++ using Command line

BASH setup

Example bashrc

# ~/.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

[ -z "$PS1" ] && return

# don't put duplicate lines in the history. See bash(1) for more options

# ... or force ignoredups and ignorespace

HISTCONTROL=ignoredups:ignorespace

# 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

# 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'

# 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 [ -f /etc/bash_completion ] && ! shopt -oq posix; then

# . /etc/bash_completion

#fi

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

alias post-review="ns-post-review.py"

Window split via screen

Example screenrc

# detach on hangup

autodetach on

# No licence info

startup_message off

# if activity is detected on an affected window switched into the background

# you will receive the activity notification message in the status line

# the window will also be marked with an @ in the window-status display

#defmonitor on

# Sets the visual bell message. message is printed to the status line

# Without parameter, the current message is shown.

#vbell_msg " *wtf?!* "

# COLOR: colors codes are combinations of

# [attribute modifier] [color description]

# the manual talks of "attribute/color modifiers".

# see the manual, section "STRING ESCAPES".

#

# Color table:

# 0 Black . leave color unchanged

# 1 Red b blue

# 2 Green c cyan

# 3 Brown / yellow d default color

# 4 Blue g green b bold

# 5 Purple k blacK B blinking

# 6 Cyan m magenta d dim

# 7 White r red r reverse

# 8 unused/illegal w white s standout

# 9 transparent y yellow u underline

# hardstatus alwayslastline : screen reserve the lastline of the display for it

# %{kb} blue background

# %{w}%d/%m/%Y - %c:%s: white current date and time

# %H hostname

# %-Lw all window #s, titles, and flags before the current window.

# %n current window number

# %f current window flag

# %t current window title

# %+Lw all windows #s, titles, and flags after the current window.

# %< ????

# %= pad remaining spaces

hardstatus alwayslastline "%{kb}%{c}[%{w}%d/%m/%Y - %c:%s%{c}]%{w} %-Lw%{+bB r}%50>%n%f %t%{-bB w}%+Lw %<%=%{c}[%{W}%H%{c}]"

Code walk-through

Vim setup

Refer sample screenrc at https://github.com/krdpk17/linux/blob/master/vimrc_dot.txt or https://drive.google.com/file/d/1kcU_pblaIs79ZbdipvNRIJ4CKEe5axiF/view

It has configuration specific to ctags as well

Emacs

Example ~/.emacs

root@ubuntu:~/ws1/rs_120/usr.src# cat ~/.emacs

(defun byte-compile-if-newer-and-load (file)

"Byte compile file.el if newer than file.elc"

(if (file-newer-than-file-p (concat file ".el")

(concat file ".elc"))

(byte-compile-file (concat file ".el")))

(load file))

(byte-compile-if-newer-and-load "~/emacs/startup")

(byte-compile-if-newer-and-load "~/emacs/p4")

Cscope

cscope_config.sh

mkcsc ()

{

#/home/ganesh/ctags --languages=C++ --c++-kinds=+p --fields=+iaS --extra=+q .;

find ./ -name '*.h' > acscope.files;

find ./ -name '*.cpp' >> acscope.files

find ./ -name '*.c' >> acscope.files;

find ./ -name '*.py' >>acscope.files;

find ./ -name '*.pm' >>acscope.files;

find ./ -name '*.s' >>acscope.files;

find ./ -name '*.java' >>acscope.files;

find ./ -name '*.hpp' >> acscope.files

cscope -bvqi acscope.files

}

mkcsc

Output of running "bash cscope_config.sh" command

# bash cscope_config.sh

.......

cscope: -q option mismatch between command line and old symbol database

> Building symbol database 380 of 46136

> Building symbol database 3510 of 46136

> Building symbol database 10610 of 46136

> Building symbol database 11610 of 46136

> Building symbol database 14040 of 46136

> Building symbol database 14910 of 46136

> Building symbol database 16170 of 46136

> Building symbol database 16640 of 46136

> Building symbol database 16800 of 46136

> Building symbol database 19470 of 46136

> Building symbol database 21760 of 46136

> Building symbol database 22130 of 46136

> Building symbol database 22590 of 46136

> Building symbol database 23150 of 46136

> Building symbol database 23940 of 46136

> Building symbol database 24520 of 46136

> Building symbol database 25150 of 46136

> Building symbol database 25450 of 46136

> Building symbol database 25640 of 46136

> Building symbol database 26620 of 46136

> Building symbol database 29610 of 46136

> Building symbol database 32800 of 46136

> Building symbol database 35930 of 46136

> Building symbol database 38380 of 46136

> Building symbol database 39480 of 46136

> Building symbol database 41430 of 46136

> Building symbol database 43900 of 46136

root@k8smaster:~/worksheet/adc#

After that use "cscope -d"

cscope and ctags

Refer https://www.youtube.com/watch?v=9NcM-Tj2UZI

gtags

Install in Linux

2025 wget http://tamacom.com/global/global-6.6.2.tar.gz

2026 ls

2027 tar -zxvf global-6.6.2.tar.gz

2028 cd global-6.6.2

2029 ls

2030 cat Makefile.

2031 vim README

2032 ls

2033 cat INSTALL

2034 cat INSTALL | more

2035 ./configure

2036 cat INSTALL | more

2037 make

2038 cat INSTALL | more

2039 make install

2040 gtags --help

2041 man gtags

2042 history

Useful link:https://www.gnu.org/software/global/download.html

http://manpages.ubuntu.com/manpages/xenial/man1/gtags.1.html

Use it along with spacemacs

Useful link: https://github.com/syl20bnr/spacemacs

Tree tool for viewing directory structure

tree tool

root@minion1:~/personal/foss/dockerhack# apt-get install tree

Reading package lists... Done

Building dependency tree

Reading state information... Done

tree is already the newest version (1.7.0-3).

The following packages were automatically installed and are no longer required:

gconf-service gconf-service-backend gconf2 gconf2-common helix-p4d-base-16.1 libavahi-glib1 libbonobo2-0 libbonobo2-common

libcanberra0 libgconf-2-4 libgnome-2-0 libgnome2-common libgnomevfs2-0 libgnomevfs2-common libllvm3.8 liborbit-2-0 libtdb1

libvorbisfile3 sound-theme-freedesktop

Use 'apt autoremove' to remove them.

0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.

root@minion1:~/personal/foss/dockerhack# cd cadvisor/

root@minion1:~/personal/foss/dockerhack/cadvisor# tree client/

client/

|-- clientexample

| `-- main.go

|-- client.go

|-- client_test.go

|-- README.md

`-- v2

|-- client.go

|-- client_test.go

`-- README.md

2 directories, 7 files

root@minion1:~/personal/foss/dockerhack/cadvisor#

Debugging setup

GDB setup

GDB should be integrated with code and it should be possible to live debugging. Refer [TBD]Useful gdb tips/cheatsheat

Linux logging

Code editing tool

Apply patch from one file diff to another branch same file

Apply patch from one file diff to another branch same file

In Branch1-

root@ubuntu:~/ws1/rs_111# p4 diff usr.src/netscaler/linux_mgmt/bin/docker_startup.sh > diff_startup

root@ubuntu:~/ws1/rs_111#

root@ubuntu:~/ws1/rs_111# cat diff_startup

==== //depot/main/rs_111/usr.src/netscaler/linux_mgmt/bin/docker_startup.sh#13 - /root/ws1/rs_111/usr.src/netscaler/linux_mgmt/bin/docker_startup.sh ====

46,47c46,58

< cp /etc/hosts /tmp/hosts.new

< sed -i '/ip6-/d' /tmp/hosts.new

---

> python - <<END

> import socket

> with open("/etc/hosts", 'r') as hosts:

> with open("/tmp/hosts.new", "w") as hosts_new:

> for line in hosts:

> addr=line.split()[0:]

> try:

> socket.inet_aton(addr[0])

> hosts_new.write(line)

> except socket.error:

> print 'ignoring ' +str(addr)

> continue

> END

In BRANCH2-

root@e4c246bcbfe0:~/ws1/rs_111_56_SSP# patch usr.src/netscaler/linux_mgmt/bin/docker_startup.sh -i usr.src/netscaler/diff_startup

-o post.sh

patching file post.sh (read from usr.src/netscaler/linux_mgmt/bin/docker_startup.sh)

Hunk #1 succeeded at 48 (offset 2 lines).

root@e4c246bcbfe0:~/ws1/rs_111_56_SSP# diff post.sh usr.src/netscaler/linux_mgmt/bin/docker_startup.sh

48,60c48,49

< python - <<END

< import socket

< with open("/etc/hosts", 'r') as hosts:

< with open("/tmp/hosts.new", "w") as hosts_new:

< for line in hosts:

< addr=line.split()[0:]

< try:

< socket.inet_aton(addr[0])

< hosts_new.write(line)

< except socket.error:

< print 'ignoring ' +str(addr)

< continue

< END

---

> cp /etc/hosts /tmp/hosts.new

> sed -i '/ip6-/d' /tmp/hosts.new

Useful link:https://linuxacademy.com/blog/linux/introduction-using-diff-and-patch/

Reference

Personal experience