How to Compile Linux Kernel with Current Configuration

This article is abount recompiling Ubuntu 14.04 kernel using current configuration. Customizing of the kernel is possible after you made copy of current config from /boot/config-`uname -r` to .config as well.
For linux distribution version other than Ubuntu 14.04 TrustyTahr might also applied with several adjustment.

Prepare workspace

$ mkdir -pv /opt/Ubuntu_x64/TrustyTahr/KERNEL
$ cd /opt/Ubuntu_x64/TrustyTahr/KERNEL

Git Current Kernel

https://wiki.ubuntu.com/Kernel/Dev/KernelGitGuide
$ git clone git://kernel.ubuntu.com/ubuntu/ubuntu-trusty.git

Get Current Kernel

$ export MYKERNEL=linux-image-$(uname -r)
$ apt-get source $MYKERNEL

$ cd cd linux-lts-utopic-3.16.0
$ cp /boot/config-`uname -r` .config

Do customize whatever you want to modify on this kernel source ...
Then,

$ make
$ make modules_install
$ make install

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Raspberry Pi GPIO Programming with C++

How to access your Rapberry Pi GPIO using C++? This brief information will lead you through the easy way to program GPIO port of Raspbery Pi B+ model . There are several c++ class library and/or methods available for you to do a program in C++, ie:
- WiringPi
- Direct Register Access by Hertaville
- Tutorial by VisualGDB
- My choice to use c++ library made by McCauley, on Raspberry-Projects.com, and Library homepage.

This article is not finished yet, ... please wait at the moment....

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slimbian - Slim and Minimalist Raspbian

Minimal installation of raspbian.Jessie is out, targetted for full running lite server or embedded application.

• 100% Official Raspbian compatible.
• Less than 500MB installed.
• Small memory footprint ~56MB.
• ~09 seconds boot up on Raspberry Pi 2.
• Linux 4.1.7-v7+ armv7l.
• SSH server enable.

 Please check slimbian here !

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Cross Compile WxWidgets/C++ Application for Raspberry Pi

How to Build wxWidgets / C++ for Raspberry Pi Model 2 (ARMv7 Architecture). 

UPDATED:

For ease to install and configure Eclipse-IDE/Toolchain, use following link of ready used installer:

http://yasriady.blogspot.co.id/2016/01/raspberry-pi-toolchain.html

wxWidgets is an awesome C++/GUI library to work with. It can produce very nice desktop interface and has complete class library either for GUI on non GUI. Binary program yields by this library is also small and portable. Statically linking is possible to make the program running independently to any linux distribution.

Raspberry Pi is credit card sized computer, it has small form factor with capability similar to PC of PIII/900MHz with 1GB RAM. Thus, sufficient to running desktop application, as in his case, Raspbian Wheezy.

Here, you will find brief tutorial how to build wxWidgets for Raspbian to run on Raspberry Pi model 2 (ARMv7 processor).

Setup environment to used are:

• Build system on Ubuntu 14.04 LTS x64
• buildroot
• wxWidgets-3.0.2
• Target: RaspberryPi2 and Raspbian Wheezy

Build Toolchain for ARMv7

To build cross architecture Toolchain we can use awesome build system called buildroot (http://buildroot.uclibc.org/)

$ cd ~
$ mkdir wxWidgets
$ cd ~/wxWidgets
$ git clone git://git.buildroot.net/buildroot
$ cd buildroot
$ make raspberrypi2_defconfig
$ make menuconfig

Adjust some requirement as follow:

    Toolchain
    C library (uClibc) --->
    (X) glibc

    Target packages > Graphic libraries and applications
    [*] X.org X WIndow System --->

    Target packages > Libraries > Graphics
    [X] libgtk2

    [Save]

$ make

Build wxWidgets for ARMv7

Once above toolchain baked and cooked well, then we can start to build and compile wxWidgets and it’s sample application.

$ export PATH=~/wxWidgets/buildroot/output/host/usr/bin:$PATH
$ cd ~/wxWidgets
$ wget http://nchc.dl.sourceforge.net/project/wxwindows/3.0.2/wxWidgets-3.0.2.tar.bz2
$ tar -xzpvf wxWidgets-3.0.2.tar.bz2
$ cd wxWidgets-3.0.2
$ mkdir -p build_rpi2/wx3.0.2u_static
$ cd build_rpi2/wx3.0.2u_static
$ ../../configure --host=arm-linux --with-gtk --with-libpng=builtin --with-libjpeg=builtin --with-libtiff=builtin --with-regex=builtin --with-zlib=builtin --with-expat=builtin LDFLAGS="-static-libgcc -static-libstdc++"
$ make 

Sit back and relax...... 

Build Sample Application

$ cd samples/minimal
$ make

Copy sample/minimal/minimal to Pi's sdcard and from there try to run: 
$ ./minimal

See the result ................

After adjusting some path as describe on buildroot manual, you can download ready  used Raspberrypi-Toolchain on sourceforge.net. The  toolchain already tested on Ubuntu 14.04 with wxWidgets-3.0.2 as target built. This toolchain can be used for compiling Plain C/C++ for Pi application.

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How to Configure Ubuntu Linux Look Like Windows 7/8

Ones who migrating from Windows to Ubuntu Linux will not lose previous look and feel, you can have similar environment in your new home. With look and feel like previous operating system style, you can customize your Ubuntu Linux like the ways I'm tried here.

What You Need?

Here I will explain in brief tutorial how to  make such configuration. What you need among some ingridients are:
- Ready used Ubuntu Linux
- Cinnamon Desktop
- Windows 7/8 Theme
- Windows Icon

Get Installed Cinnamon Desktop

First, you need to install Cinnamon Desktop in your Linux Box with following command line:

Terminal Commands:
$ sudo add-apt-repository ppa:lestcape/cinnamon
$ sudo apt-get update
$ sudo apt-get install cinnamon

Install Windows Theme

Terminal Commands:
$ sudo add-apt-repository ppa:noobslab/themes
$ sudo apt-get update
$ sudo apt-get install win-themes

Install Windows Icons

Terminal Commands:
$ sudo add-apt-repository ppa:noobslab/icons
$ sudo apt-get update
$ sudo apt-get install win-icons

Apply The Installation

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How To Change Grub Default Boot

This article will show you how to change Grub default boot for any installed operation system inside your computer, be it various Linux or Windows. The steps here known to working very well in my Ubuntu 14.04, while other version or distribution may have similar method.



$ sudo cp /etc/default/grub /etc/default/grub.bak
$ sudo nano /etc/default/grub


Change to


After saving above file, then issue this command:

$ sudo update-grub



$ sudo reboot

You can search MenuEntry Label on this file: /boot/grub/grub.cfg

 




 

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Build wxWidgets Application to Run on Any Linux

Link wxWidgets application statically and run on any linux distribution without missing any dependency files.

This tutorial inspired by article written by Tierra here, mentioned about linking with gtk and run on any linux. Also to show you how to make static linking to libstdc++ since various linux distribution will have different version of this library that could lead to error program to running.

Note: Remember that GTK is licensed under LGPL, which essentially means that in order to link it to your application _statically_, your application will have to be (L)GPL-licensed.

$ sudo mkdir -p /opt/wxWidgets
$ cd /opt/wxWidgets
$ wget http://ftp.wxwidgets.org/pub/3.0.2/wxWidgets-3.0.2.tar.bz2
$ tar -xapvf wxWidgets-3.0.2.tar.bz2
$ cd wxWidgets-3.0.2
$ mkdir -p build2/wx3.0.2u_static

$ cd build2/wx3.0.2u_static
$ ../../configure --disable-shared --with-gtk --with-libtiff=builtin --with-libjpeg=builtin --with-libpng=builtin --with-regex=builtin --with-zlib=builtin --with-expat=builtin LDFLAGS="-static-libgcc -static-libstdc++"
$ make 

Note: using similar switch as shown at autoconf above , you may also build/compile any Plain C/C++ application to link statically.

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GUI Designer for wxWidgets using wxFormBuilder

I used wxFormBuilder frequently in recent years as GUI Designer when coding with wxWidgets. This RAD tools very much help programmer to build GUI up and running in a snap. Following tutorial will guide you in quick simple steps to configure and work with wxFormBuilder.

Installing wxFormBuilder in Ubuntu

$ sudo apt-get install libwxgtk3.0-0 libwxgtk-media3.0-0

$ sudo add-apt-repository -y ppa:wxformbuilder/release
$ sudo apt-get update

$ sudo apt-get install wxformbuilder

Installing wxFormBuilder in Windows

Get download wxFormBuilder_v3.5.1-rc1.exe

Work with the Tools, Begin wxFormBuilder

Starting the program and you will be greeted with new blank project with MyProject1 as an intial name.

For easy associating with the UI naming, then I would like to alter this name into UI. Take a look at Object Properties on the right pane, and make change to this properties:

name : UI
file : UI

Then save the project into your netbeans project (let say into folder wxApp) and make the name UI.fbp

Adding Frame

Activate tab [Forms], then select/click Frame to insert it into project and adjust properties: 

name : MainFrame
title : My wxApp

You basic GUI is now ready and to make a test, just press [F5]

Working with Window Controls

To enrich the GUI and to have full featured application  window, you may can follow the step below:
Adding layout:

[Layout] + wxFlexGridSizer
Properties :
growablecols : 1

Adding Label or StaticText

[Common] + wxStaticText
Properties :
label : What is your name:

Adding TextControl

[Common] + wxTextCtrl
Properties :
flag : wxEXPAND [v]

Adding Spacer

[Layout] + spacer

Adding Button

[Common] + wxButton
Properties :
flag : wxALIGN_RIGHT [v]

Preview the Window, press [F5]

Generate C++/wxWidgets codes

After make a GUI design, you may then generate C++ code, just press :
[F8] to Generate base class and yield you with 2 files UI.cpp and UI.h. PLEASE DO NOT make any MODIFICATION directly to these files
[F6] to Generate Inherited Class inside the files UIMainFrame.cpp and UIMainFrame.h, on which you will work with directly

Complete File is Here !

Get fresh wxApp from my Github repository, clone to your local folder and try to figure out the files inside this netbeans projects.

Happy coding …………………… / Ddy

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Howto Build wxWidgets with MinGW

This tutorial is intended for the beginner who wish to have wxWidgets up and running in Windows environment. The build using MinGW without Msys.

Installing Toolchain

Download TDM-GCC from http://tdm-gcc.tdragon.net/download

After completion of installation, please relogin to Windows to make sure path to tdm-gcc applied.

Prepare wxWidgets Source

> Extract wxWidgets-3.0.2.zip into c:\opt\wxWidgets\wxWidgets-3.0.2
> cd \opt\wxWidgets\wxWidgets-3.0.2\build\msw

Build for DEBUG Version

> mingw32-make -f makefile.gcc BUILD=debug UNICODE=1 SHARED=0 CXXFLAGS="-std=gnu++11"

Build for Release Version

> mingw32-make -f makefile.gcc BUILD=release UNICODE=1 SHARED=0 CXXFLAGS="-std=gnu++11"

Final Result is Here

That’s all, the simple steps to build wxWidgets on Windows without Msys. Check the result inside this folder: lib\gcc_lib

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GitHub - HowTo Work With

It would be easy for us to have program source code stored in centralized version control system in the server. GitHub provide such service free for open source projects. The simple steps herewith will guide you to setup and initialize your very first project into GitHub.

Install Git on Ubuntu

$ sudo apt-get install git

Configuring GitHub

$ git config --global user.name “user_name”
$ git config --global user.email “email_id@domain”

Create Local Repository

$ git init MyRepo



$ cd MyRepo

Create README.md

README.md is initial file you may put on the repo.

$ nano README.md

Adding Repository Files to an Index

For the next, you can populate MyRepo directory with program source codes. copy over all the files into the directory, or create one if you wish to.

$ git add *
$ git commit -m “some_message”

Create Repo on GitHub with Same Name

Once the repo is made on the GitHub server, you may then push local content. To connect to GitHub, use following command:

$ git remote add origin https://github.com/yasriady/MyRepo.git

Pushing Files into GitHub

Final step is to push your files into server with following command line:

$ git push origin master

Check the result on your GitHub.com

 
Congratulation,.... you are now on GitHub, Happy Coding....!!

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How To Make Linux Fonts Look Like Windows Fonts

I like to see my Ubuntu Desktop fonts sharp like one appears on Windows. This brief tutorial will guide you how to make such appearance. For other distribution you might use, the step is almost similar.

For this purpose, I set font configuration with following simple steps:

$ sudo apt-get install msttcorefonts

$ wget http://file-id.sf.net/downloads/39-clearfonts.conf
$ sudo cp 39-clearfonts.conf /etc/fonts/conf.avail/
$ sudo ln -s /etc/fonts/conf.avail/39-clearfonts.conf /etc/fonts/conf.d

Download 39-clearfonts.conf here.

To make this change applied, please relogin your current session. 

Then you may use unity-tweak-tool to customize appearance of the desktop. If not installed, then do this command line:
$ sudo apt-get install unity-tweak-tool
$ unity-tweak-tool

Make a selection to [Appearance] - [Fonts], then adjust your font to match Windows Look a Like ……. 

See the result:

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How To Configure wxWidgets on Ubuntu

Configuring wxWidgets into Netbeans is not so complicated, even for those who are new to the application will find the easy way to work with. This short tutorial is intended to guide you to setup wxWidgets on Ubuntu 14.04, thus you can begin to code immediately. 

Take a look the simple step, and happy coding with wxWidgets …..

$ sudo apt-get install build-essential

$ sudo apt-get install netbeans $ sudo apt-get install wxformbuilder $ sudo apt-get install libwxgtk3.0-dev 

Install C++ Plugins

After starting netbeans, then make selection to:  Make [Tools] - [Plugins]

Download initial Netbeans project: wxApp.zip, include GUI project by using wxFormbuilder.

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How to Build wxWidgets on Windows with MSys/MinGW

This tutorial will guide you step by step to build wxWidgets-3.0.2 on Windows using MSys/MinGW.
Download and do Install Msys 1.0.11 from http://www.mingw.org/wiki/msys


Download and Instal TDM-GCC




Edit C:\msys\1.0\etc using your favorite editor:


Open MSys Command Prompt

$ cd /opt/wxWidgets
$ wget http://nchc.dl.sourceforge.net/project/wxwindows/3.0.2/wxWidgets-3.0.2.tar.bz2
$ bunzip2 wxWidgets-3.0.2.tar.bz2
$ tar -xvf wxWidgets-3.0.2.tar
$ cd wxWidgets-3.0.2
$ ./configure --enable-debug --disable-shared --with-msw
$ make

The library result can be fond here:
C:\opt\wxWidgets\wxWidgets-3.0.2\lib\gcc_lib

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