Hi Anna, Can you send the code which is currently giving segmentation fault. Did you try to debugging the code using GDB . If you have not done yet can you try debugging through GDB and find out as on executing what section of code you are getting the segmentation fault. what can you send the core dumped information. With regards, Anandkumar.C.B -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Anna Sidera Sent: Thursday, November 13, 2008 5:07 AM To: gcc-help@xxxxxxxxxxx Subject: change to gcc from lcc Hello, I wrote a program in lcc in windows and now I have to write it in gcc in unix. In lcc the program works. It uses the following libraries. #include <stdio.h> #include <math.h> #include <stdlib.h> #include <time.h> In gcc I run the program as follows gcc -lm program.c but I get segmentation fault (core dumped) Can you please advise me on this? Many Thanks Anna Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You.