TAUCS installation on MAC

Several problems boil down to solving matrices of linear equations. Multiple solvers exist out there to do that, but with very different performances. In the subset that is Open Source (read: BSD-like), ITK chosed to use VNL's solvers, but our experiments (well, arnaud's experiments) show that TAUCS would be faster by two orders of magnitude. As I wanted to double check those results to include them in my presentation, I had to install TAUCS on my Mac Laptop. It has been quite painfull and I write about here to be sure I can find how to do it again later :) Un certain nombre de problemes scientifiques se reduisent a resoudre un systeme d equatons lineaires. Un certain nombre de librairies proposent des algorithmes pour ca, mais les performances varient enormement d'une librairie a l'autre. Dans le sous groupe qui est fourni sous licence libre (BSD) il semblerait que TAUCS ai les meilleures performance, ameliorant la vitesse par un facteur 100. COmme je voulais verifier ca sur mon ordinateur, j ai du installer TAUCS sur mon MAC portable. C'etait relativement dur et j'ecris la recette ici pour etre sur que je pourrais le refaire la prochaine fois. needed libraries: atlas/cblas given with MacOS metis need to be downloaded (http://glaros.dtc.umn.edu/gkhome/views/metis), compiled and installed OSTYPE must be defined as Darwin ./configure ./testscript f2c not needed g2c not needed