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Download

GAMERA is available on github. There, you can download a zip archive with the source code or clone it with git via

$ git clone https://github.com/libgamera/GAMERA.git

Installation

Dependencies

You will have to compile GAMERA from source. Apart from a C++ compiler (e.g. using gcc on Linux or clang on Mac), you need to install the following dependencies:

• the GNU scientific library gsl
• the C/C++ python wrapper swig, if you want the python-wrapped version (i.e. GAPPA)
• python (including the headers) for GAPPA

On Linux:

• On Ubuntu 16.04 LTS

  These packages are readily available on all major Linux platforms. On Ubuntu 16.04 LTS,
  you can install them via

  sudo apt install libgsl2 libgsl-dev swig python-dev
  

• On Ubuntu 18.04 LTS (and 20.04)

  sudo apt install libgsl23 libgsl-dev swig python-dev pkg-config
  

On MacOS:

many repositories provide gsl and swig, for example homebrew:

$ brew install gsl swig

It might also be required to install pkg-config. Installation instructions can be found e.g. here.

On some MacOS systems, issues are encountered in the compilation phase. These can be fixed by adding 2 lines to the file <GAMERA-path>/python/setup.py

after line 20 add:

extra_compile_args.append(“-stdlib=libc++”)
extra_link_args.append(“-stdlib=libc++”)

on some other MacOS versions (e.g. Mojave 10.14.5) a further issue can stop the compilation of the gappa library: the swig version that can be installed does not support anymore the option -nosafecstrings option. The workaround is to remove it from the Makefile (at line 70).

The latest version of GAMERA does not need anymore the -nosafecstrings option.

Building: python

Compilation

If you are interested in the python package (GAPPA), run

$ make gappa

and it will generate lib/_gappa.so and lib/gappa.py.

Usage

In your python script, You need to add the directory holding the module (default: lib/ in the GAMERA directory) to the search path for modules, e.g.:

import sys
sys.path.append('/home/user/Documents/GAMERA/lib')

Building: C++

Compilation

To build the C++ library, go to the base GAMERA directory and run

$ make gamera

This will create the shared object lib/libgamera.so which can be used in C++ programs.

Usage

To use the library in you program, compile like e.g.:

$ gcc -o yourProgram yourProgramSource.C -lgamera -L$(LIBDIR)

where LIBDIR is the directory where libgamera.so is located (default: lib/ in the GAMERA directory). Also, it might be necessary to export the lib directory to LD_LIBRARY_PATH, e.g.:

$ export LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH

Updating GAMERA

After any new git pull, you should clean up the directory via

$ make clean

and re-compile with the commands above.

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