Hi, I have GCC-4.3.3 installed as 32-bit compiler. Obviously it also produces 32-bit output files by default. Using "cc -maix64" to produce 64-bit output works fine. I want to change the default (so I do not need to specify "-maix64 on the command line). How would I change this (probably by writing something into the specs file)? Thanks for an answer, cheers, Olaf -- Olaf Gellert email gellert@xxxxxxx Deutsches Klimarechenzentrum GmbH phone +49 (0)40 41173 214 Bundesstrasse 55 fax +49 (0)40 41173 270 D-20146 Hamburg, Germany www http://www.dkrz.de