octave doesn't build DSO's with -fPIC

[Ben Abbott]

On Dec 6, 2007, at 6:19 PM, John W. Eaton wrote:

> On  6-Dec-2007, Ben Abbott wrote:
>
> | On Thursday, December 06, 2007, at 03:03PM, "John W. Eaton" <jwe at bevo.che.wisc.edu 
> > wrote:
> | >On  6-Dec-2007, Jack Howarth wrote:
> | >
> | >|    I noticed while building octave 2.9.18 on Leopard that, for
> | >| Darwin at least, octave is not properly using the -fPIC compiler
> | >| flag when creating objects for shared libraries. Linking non-PIC
> | >| code into shared libraries can introduce obscure bugs and is
> | >| discouraged.
> | >
> | >Perhaps this is the real source of all the trouble on Intel Mac  
> OS X
> | >systems.  Would someone please try the following patch and see if  
> it
> | >fixes the problems?  After applying it, you'll need to run
> | >
> | >  ./autogen.sh
> | >
> | >to regenerate the configure script, then configure and build as  
> usual.
> | >
> | >Since the lines that are changed should be copied verbatim into the
> | >configure script, you might also get away with patching configure
> | >directly.
> | >
> | >jwe
> | >
> |
> | I don't consider my results to be conclusive. I compiled octave  
> using g95, but the dependencies may have used gfortran.
> |
> | ./configure '--prefix=/sw'  '--infodir=${prefix}/share/info' '-- 
> mandir=${prefix}/share/man' '--libexecdir=${prefix}/lib' '-- 
> build=i386-apple-darwin' 'build_alias=i386-apple-darwin' 'CFLAGS=-O0  
> -g -ggdb3' 'LDFLAGS=-L/sw/lib' 'CPPFLAGS=-I/sw/include' 'CXXFLAGS=- 
> O0 -g -ggdb3' 'F77=/sw/bin/g95' 'FFLAGS=-O0'
> |
> | In any event, the problem with strptime apparently remains. During  
> "make check"
> |
> |   scripts/time/datevec.m .................................panic:  
> Bus error -- stopping myself...
> |
> | John, is there a simple way to force the configure process to  
> treat my system's strptime as being broken? (I'm a matlab/octave and  
> fortran guy, and quickly get lost looking at shell scripts and c/c++  
> code).
>
> So you applied the patch, regenerated the configure script, ran
> configure again, and the compile used -fPIC?  If so, and the crash is
> still happening, then I don't have any clues.

Yes, I (1) applied the patch, (2) ./autogen.sh, (3) ./configure ... ,  
(4) make, (5) make check

Ben