Thanks for the help Chris. I think the problem is my lack of knowledge of C which is compounded by the Python-to-C and Numeric Python-to-C interfaces. I might need to learn a lot more about C pointers and structures and how they are used in the two interfaces before I can fix the problem. Oh well, the C modules will have to remain dysfunctional on non 32 bit x86 chips for now.
Thanks again, Edward On 13/03/06, Chris MacRaild <[EMAIL PROTECTED]> wrote: > I get a segfault at the grid search in your test script whenever -fPIC > is used in the compile, using any of the permutations you suggested. eg: > > bin/relax1.2.3> gcc -fPIC -I/usr/include/python2.4 -c -o > maths_fns/c_chi2.os maths_fns/c_chi2.c > maths_fns/c_chi2.c: In function 'chi2': > maths_fns/c_chi2.c:54: warning: cast from pointer to integer of > different size > bin/relax1.2.3> gcc -fPIC -I/usr/include/python2.4 -c -o > maths_fns/exponential.os maths_fns/exponential.c > maths_fns/exponential.c: In function 'exponential': > maths_fns/exponential.c:47: warning: cast from pointer to integer of > different size > bin/relax1.2.3> gcc -fPIC -I/usr/include/python2.4 -c -o > maths_fns/relax_fit.os maths_fns/relax_fit.c > maths_fns/relax_fit.c: In function 'back_calc_I': > maths_fns/relax_fit.c:158: warning: cast from pointer to integer of > different size > maths_fns/relax_fit.c:162: warning: cast from pointer to integer of > different size > bin/relax1.2.3> gcc -shared -o maths_fns/relax_fit.so > maths_fns/c_chi2.os maths_fns/exponential.os maths_fns/relax_fit.os > > compiles ok but segfaults > > > > Manual compile without -fPIC fails on the final gcc -shared command: > > bin/relax1.2.3> gcc -shared -o maths_fns/relax_fit.so > maths_fns/c_chi2.os maths_fns/exponential.os maths_fns/relax_fit.os > /usr/lib64/gcc/x86_64-suse-linux/4.0.2/../../../../x86_64-suse-linux/bin/ld: > maths_fns/c_chi2.os: relocation R_X86_64_32S against `back_calc' can not be > used when making a shared object; recompile with -fPIC > maths_fns/c_chi2.os: could not read symbols: Bad value > collect2: ld returned 1 exit status > > > > On Sun, 2006-03-12 at 18:42 +1100, Edward d'Auvergne wrote: > > Actually as the chip architecture is different, maybe the commands > > > > $ gcc -fPIC -I/usr/include/python2.4 -c -o maths_fns/c_chi2.os > > maths_fns/c_chi2.c > > $ gcc -fPIC -I/usr/include/python2.4 -c -o maths_fns/exponential.os > > maths_fns/exponential.c > > $ gcc -fPIC -I/usr/include/python2.4 -c -o maths_fns/relax_fit.os > > maths_fns/relax_fit.c > > $ gcc -shared -o maths_fns/relax_fit.so maths_fns/c_chi2.os > > maths_fns/exponential.os maths_fns/relax_fit.os > > > > will produce functional modules. I forgot to mention that the bug > > report is called 'bug #5473'. > > > > Thanks, > > > > Edward > > > > _______________________________________________ Relax-users mailing list [email protected] To unsubscribe from this list, get a password reminder, or change your subscription options, visit the list information page at https://mail.gna.org/listinfo/relax-users
