Hello to all,
I had written a C program in an old Unix machine about six months ago which was running fine. Now the disk has been corrupted and I cannot access this program. However I had made a spare copy of this program in a Linux machine. On checking I find that the code is exactly the same (checking with a hard copy) but there is a segmentation error on running (compilation is OK). The program is about 500 lines long.
Kindly give me a few hints as to what I should check for to diagoize the problem.
Sincerely yours,
A. S. Padmanabhan,
Professor of Physical Chemistry

I am not so much of a programmer. but maybe you can debug it using gdb.

Library depencies would probably be the suspect here. Maybe the library was implemented differently on the Unix and Linux. Then again, all this are my 2cents.

Did you make a copy of the source and compile it using gcc for running on linux?

Try compiling it with the -Wall and -pedantic options and see if you get any warnings.

Here is a detailed article by IBM on debugging techniques in Linux:
http://www-106.ibm.com/developerwork.../?dwzone=linux

I hope it helps.

There is a book titled 'Linux Programming by Example' which may be worth your while picking up. It contains detailed information on topics like memory allocation. Such as making sure you have a valid pointer after using realloc().
There were some mentions of differences between some gnu routines and the unix equivalents.
Another book, Advanced Programming in the Unix(R) Environment starts out with detailing the SUS compliance of Unix and Linux versions, and how to determine certain standard values at compile and run time.

You probably should of posted this message in the 'programming' forum instead. The moderator may actually move it there.

Please do not post the same thread in more than one forum. Picking the most relevant forum and posting it once there makes it easier for other members to help you and keeps the discussion all in one place.

http://www.linuxquestions.org/rules.php

other thread is here:
http://www.linuxquestions.org/questi...hreadid=267331