Mihai T. Lazarescu <mtlagm <at> gmail.com> writes: > > On Sat, Nov 02, 2013 at 05:55:37PM -0500, Ranjan Maitra wrote: > > > Hi, > > > > I have obtained a set of open-source programs from > > > > http://petertoft.dk/PhD/Recon2D.tar.gz > > > > uncompressed, etc, and it all goes through fine. > > > > When I compile, the programs work fine on my old 32-bit machine > > (results make sense), however there is a segmentation fault on my > > 64-bit laptop. > > > > I compile using: > > > > gcc -c -I../include -O3 -finline-functions -Winline -Wall > > -falign-loops=2 -falign-jumps=2 -falign-functions=2 > > -Wstrict-prototypes ..... > > > > (Note that I had to fix the makefiles in there.) > > > > Btw, I don't know if this could have anything to do with it, but this > > set of programs were written in 1996 (when 64-bit probably did not even > > exist at all). Also, all the code uses single-precision (floats) rather > > than my preferred doubles. (Which makes me ask: is it possible to go > > into all the many files and convert all the floats into doubles using > > some command? ) > > You can add -m32 to gcc arguments. > > Mihai I have to second Mihai's advice. I'm currently doing some contract work porting a rather large and very crufty C application from Solaris to Linux for a national telecom. The program actually was running under OS/2 at one time and had it's roots on PrimOS. We initially started out also going to 64 bit and had to backtrack. See how your program runs on the 64 bit box when compiled as a 32 bit application. Then decide whether to change the floats to longs first or to port it to 64 bit. The other advice on debugging is spot on. Compile with -g and run it under the debugger of your choice. gdb works fine for this. Cheers, Dave -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
