[s2plot] Installing S2PLOT on Ubuntu 14.04 LTS 64bits

Source code from S2PLOT:http://astronomy.swin.edu.au/s2plot/versions/s2plot-3.2.1.tar.bz2

Thanks for Navtej's BLOG, I almost follow his tutorial.

Besides the issues mentioned in his blog, I also refer to this github.

#This tutorial is used to reappear their guides
#I executed all the following steps in root mode.

-----------------------------------

1. Download the latest version of S2PLOT from official S2PLOT website.
2. Install the essential packages:
   

   sudo apt-get install libhpdf-2.2.1 libhpdf-dev freeglut3 
   freeglut3-dev libfreetype6 libfreetype6-dev libgd2-xpm-dev g++

3. Extract the file to a directory where you want. 
4. Follow the INSTALL.txt, I plan to install it under /usr/local/s2plot 
5. build.csh is the only file we have to take care, as it executes the other scripts automatically.
6. Then set up the essential environment variables:

export S2PATH=/usr/local/s2plot
export S2ARCH=linux-gnu-x86_64 
export S2SHARED=yes
export S2FREEGLUT=yes
export S2FREETYPE=yes 
export S2PLOT_PRCDRIVER=s2prcwriter  

7. In s2plot.csh, change
   

   set S2X11PATH=/usr/X11R6

   to

   set S2X11PATH=/usr

8. In linux-gnu-x86_64.in, change COMPPATH to the place of your gcc. In general, you can change it to

   set COMPPATH="/usr/bin"

9. Run ./script/build.csh 
10. Two potential issues as mentioned in Navtej's BLOG, the procedure may fail while linking S2view program. He gave a solution that changing the following lines in build-viewer.csh :
    

    $S2CLINKER -o s2view geomviewer.o -L. ${S2LINKS} ${MLLINKS} 
    ${SWLINKS} ${GLLINKS} -L${S2X11PATH}/lib${S2LBITS} 
    ${S2FORMSLINK} -lXpm -lX11 ${IMATH} -lm ${XLINKPATH}
    

    to

    $S2CLINKER -o s2view geomviewer.o -L. ${S2LINKS} ${MLLINKS} 
    ${SWLINKS} ${GLLINKS} -L${S2X11PATH}/lib${S2LBITS} 
    ${S2FORMSLINK} -L/usr/lib/x86_64-linux-gnu -ldl -lXpm -lX11 
    ${IMATH} -lm ${XLINKPATH}
11. Another one is the error that it is not able to find libXpm on your machine.
    

    sudo ln -s /usr/lib/x86_64-linux-gnu/libXpm.so.4 /usr/lib/x86_64-linux-gnu/libXpm.so

12. In case that you got a error message like "::too many arguments ", Set
    S2LIBINDEX="ranlib" instead of S2LIBINDEX=":" in scripts/linux-gnu-x86_64.in.
13. Executable files will be generated in "/usr/local/s2plot-3.2.1/linux-gnu-x86_64". Then you can run the examples with the following commands from /usr/local/s2plot-3.2.1 directory:

    ./linux-gnu-x86_64/s2view
    ./linux-gnu-x86_64/ns2thwcube