FFTW and IT++ with Eclipse And Command Line

Installation of FFTW:

1. Download the latest FFTW package from http://www.fftw.org/.
2. Unzip and install FFTW:

1. cd ~/Downloads/fftw-3.3.5

2. ./configure
   

3. make && make install
   

3. Verify that libfftw3.a and libfftw3.la are present in the path /usr/local/lib

Installation of IT++:

1. Download the latest IT++ package from http://itpp.sourceforge.net/4.3.1/installation.html.
2. Unzip and go inside the folder : cd ~/Downloads/itpp-4.3.1
3. Create a build directory : mkdir build && cd build/
4. Open cmake GUI. If cmake not present , visit https://cmake.org/download/
5. In cmake, add the following entries:
   1. Where is the source code: ~/Downloads/itpp-4.3.1
   2. Where to build the binaries:~/Downloads/itpp-4.3.1/build
6. Click Configure -> Use default native compilers -> Done
7. Click Generate
8. Return back to terminal. Run make && make install to build & install. [Locate the shared library at /usr/local/lib/]

NOTE: Install FFTW (or any other dependent packages) before IT++

Linking IT++ in Eclipse:

1. Install the latest Eclipse CDT from https://eclipse.org/cdt/.
2. Add the shared library of itpp in the path:
   1. Project -> Properties -> C/C++ General -> Paths and Symbols -> Libraries -> Add -> enter 'itpp' -> OK
3. Write (or get it from BitBucket) C++ code which uses IT++ functions. Then
   1. Build Project
   2. Run As -> Local C/C++ Application
4. If the following error "Launch failed. Binary not found." is encountered, then fix it by: Project -> Properties -> C/C++ Build -> Settings -> Binary Parsers -> check Mach-O 64 Parser

Linking IT++ in Command Line:

1. PATH=$PATH:/usr/local/include/:/usr/local/lib/
2. g++ -o <output> <filename>.cc -litpp
3. ./<output>