On Wed, Sep 29, 2010 at 06:46:20PM +0100, abdelkader belahcene wrote: > hi, > by default I have to add option -lm to the command gcc -lm file.c > when I use math functions. Where can I configure gcc to add it to the > default gcc, after what I don't need the option -lm , just gcc file.c > thanks for help > You could add alias gcc='gcc -lm ' (note the last space) to /etc/profile Cheers, David