[Eclipse] c++11 support

When i'm trying to use some new features in c++11, for instance, unordered_map class, Eclipse CDT cannot resolve it successfully.

To solve the above problem,  two steps need to be done:

1) Right click on your project->Properties->C/C++ Build->Settings->GCC c++ compiler->misc->Other Flags

Please add "-std=c++0x"

2) After step 1, it may work just fine. But just in case there's still issue on resolving "unordered_map", 

choose:  C/C++ general->Paths and Symbols->symbols

add "__GXX_EXPERIMENTAL_CXX0X__".

Eclipse CDT semantic errors but can compile, how to fix?

I recently was using Eclipse CDT as an alternative of Visual Studio for development.
And it sometimes shows semantic errors but the project can actually be compiled successfully.

I found this post: http://stackoverflow.com/questions/8148235/eclipse-cdt-shows-semantic-errors-but-compilation-is-ok

To solve it:
Click on File->Properties->C/C++ general->Indexer,
where you will find a tab on the top: Enable project specific settings.
You need to check this box.

Then roll all way down to the bottom, you will find an option:
Build configuration for the indexer.
Choose "Use active build configuration"

This works perfectly for me.

[compile] SVM_struct

Recently, i'm interested in SVM struct software: http://tfinley.net/software/svmpython2/ However, when i'm compiling it, i got the following error. /usr/bin/ld: note: 'exp@@GLIBC_2.2.5' is defined in DSO /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/libm.so so try adding it to the linker command line /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/libm.so: could not read symbols: Invalid operation I googled the problem, and find that it is caused by the gcc-4.6 compiler. The problem was gone after i removed -lm in LDFLAGS

[Ubuntu 12.04 + win7 dual boot on RAID 1]

1) Download ubuntu alternate install iso.
http://releases.ubuntu.com/precise/

2) Install

3) Reboot...But no Grub2 is installed.

4) Install Grub2.
http://www.howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot/


sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair
boot-repair


5) Reboot. Should have ubuntu entries.

6) open terminal. sudo update-grub. Win7 entry will be added to Grub2.

Install FLANN with Python support

1) download FLANN http://www.cs.ubc.ca/~mariusm/index.php/FLANN/FLANN
2) download compiled DLL files from PCL: http://pointclouds.org/downloads/windows.html
3) put DLLs in src/python/bindings/lib
4) put src/python folder into python27/lib/site-package

Install OpenCV 2.3 with Python support

http://www.youtube.com/watch?v=b3IQyhJXK78

/* Installing OpenCV 2.3 in Ubuntu.I had a lot of problems initially to install and port the OpenCV library to Python. But after reading a lot of blogs I finally found a solution which I have posted below. */


//jayneil.dalal@gmail.com

//28-10-11

1)Install all pre requisites

sudo apt-get install build-essential

sudo apt-get install cmake

sudo apt-get install pkg-config

sudo apt-get install libpng12-0 libpng12-dev libpng++-dev libpng3

sudo apt-get install libpnglite-dev libpngwriter0-dev libpngwriter0c2

sudo apt-get install zlib1g-dbg zlib1g zlib1g-dev

sudo apt-get install libjasper-dev libjasper-runtime libjasper1

sudo apt-get install pngtools libtiff4-dev libtiff4 libtiffxx0c2 libtiff-tools

sudo apt-get install libjpeg8 libjpeg8-dev libjpeg8-dbg libjpeg-prog

sudo apt-get install ffmpeg libavcodec-dev libavcodec52 libavformat52 libavformat-dev

sudo apt-get install libgstreamer0.10-0-dbg libgstreamer0.10-0  libgstreamer0.10-dev

sudo apt-get install libxine1-ffmpeg  libxine-dev libxine1-bin

sudo apt-get install libunicap2 libunicap2-dev

sudo apt-get install libdc1394-22-dev libdc1394-22 libdc1394-utils

sudo apt-get install swig

sudo apt-get install libv4l-0 libv4l-dev

sudo apt-get install python-numpy

sudo apt-get install build-essential libgtk2.0-dev libjpeg62-dev libtiff4-dev libjasper-dev libopenexr-dev cmake python-dev python-numpy libtbb-dev libeigen2-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev

2)Install the python development headers

sudo apt-get install python-dev

3)Download the source code: 
http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.3/

4)Go to the directory where OpenCV is downloaded via the terminal only and then un zip the package:
(note:- It is recommended that you move the downloaded OpenCV package to the home/<user> directory

tar -xvf OpenCV-2.3.1a.tar.bz2

cd OpenCV-2.3.1/
 
5)Now make a new directory called build and go in to it
mkdir build
cd build

6)Run Cmake

cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=OFF -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON ..

7)Now make

make

8) Make it permanent

sudo make install


9)Configuring OpenCV for using shared libraries:

sudo gedit /etc/ld.so.conf.d/opencv.conf

Add the following line at the end of the file (it may be an empty file, that is ok) and then save it:

/usr/local/lib

Close the file and run the following command to configure the library:

sudo ldconfig

OR RUN : export LD_LIBRARY_PATH=/usr/local/lib
10)Open your .bashrc file and add the following:
gedit .bashrc

sudo gedit /etc/bash.bashrc


add the following at the end of the file -
 

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH

Save and close the file

11) Reboot the system

http://ubuntuone.com/0qwnXh8VoufDMHGiu5kLIK (Link to download this text file)

How to pass IEEE PDF eXpress Site

In my first submission I followed the instructions here and everything was wonderful, but one week later I had to update the paper, I 

added a line and did the same procedure but it failed! I got the following error:

"miktex gpl ghostscript 8.60 unrecoverable error exit code 1"

Then I tried the same procedure again with the first file which successfully passed my first pdfexpress trial, but it also gave the 

same error. I tried with different computers but failed. I updated mixtex to 2.9 but again failed. Later I solved the problem with the 

following procedure:

I did not have GhostScript in my computer so downloaded it from

http://mirror.cs.wisc.edu/pub/mirrors/ghost/GPL/gs900/gs900w32.exe

and GhostView from 

http://pages.cs.wisc.edu/~ghost/gsview/index.htm

I formed my .ps file as usual (either described in this page or directly from latex "dvi to ps" button), opened my ps file with 

GhostView and did the same settings given in the last line of the solution offered in this page (the line starting with ps2pdf) as 

follows:

1- Open your ps file with GSView. 
2- From GSView "File" menu select "Convert". 
3- A dialog box will open. Select "pdfwrite" from left of the box. At the right there is a "Properties" button, select it and do the 

following settings:

Set "CompatibilityLevel" to 1.4
Set "PDFSETTINGS" to /prepress
Set "EmbedAllFonts" to true
(I also set "SubsetFonts" to true, but I don't know if it is necessary).

4- Click OK and save your file. And at last it absolutely passes the pdfexpress!