Re: [gentoo-science] sage-singular

[Steven Trogdon]

On   04/12/10 - 14:22:30, François Bissey wrote:
> > François,
> >
> > Singular -- good. I do get -fPIC compile issues here on my amd64:
> >
> > g++ -shared  -o libsingular.so \
> >          libsingular-tesths.o iparith.o mpsr_Tok.o claptmpl.o \
> >          grammar.o scanner.o attrib.o eigenval_ip.o extra.o fehelp.o
> > feOpt.o ipassign.o ipconv.o ipid.o iplib.o ipprint.o ipshell.o
> lists.o
> > sdb.o fglm.o interpolation.o silink.o subexpr.o janet.o wrapper.o
> > libparse.o sing_win.o gms.o pcv.o maps_ip.o walk.o walk_ip.o
> cntrlc.o
> > misc.o calcSVD.o  slInit_Dynamic.o -lkernel -L../kernel -L../factory
> > -L../libfac
> >
> -L/var/tmp/portage/sci-mathematics/sage-singular-3.1.0.4.20100214/work/sing
> > ular-3-1-0-4-20100214/src/build/opt/sage/local/lib64 -lsingfac
> -lsingcf
> > -lntl -lreadline -lgmp -lomalloc
> >
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.3.4/../../../../x86_64-pc-linux-gnu/bin/
> > ld: libsingular-tesths.o: relocation R_X86_64_32 against `a local
> symbol'
> > can not be used when making a shared object; recompile with -fPIC
> >
> > I've tinkered with this in the past and the following allowed
> building
> > to proceed.
> >
> >          sed -e "s:@CFLAGS@:@CFLAGS@ -fPIC:" -e
> > "s:@CXXFLAGS@:@CXXFLAGS@ -fPIC:" \
> >                  -i */Makefile.in || die "failed to fix CFLAGS in
> > Makefile.in files"
> >          sed -e "s:@CFLAGS@:@CFLAGS@ -fPIC:" -e
> > "s:@CXXFLAGS@:@CXXFLAGS@ -fPIC:" \
> >                  -i factory/GNUmakefile.in || die "failed to fix
> CFLAGS
> > in GNUmakefile.in"
> >          sed -e "s:{libdir} \${LIBSINGULAR_LIBS}:{libdir}
> -Wl,-soname
> > \${LIBSINGULAR_LIBS}:" \
> >                  -i Singular/Makefile.in || die "failed to fix
> LDFLAGS
> > in Makefile.in"
> >
> > but this may not be the best way to fix things. I did notice that
> Sage
> > builds Singular with -fPIC for all architectures.
> >
> Hi Steve,
>
> indeed you would! -fPIC is mandatory on amd64 I think.
> I was concerned that we shouldn't build the binaries or the static
> libraries
> with -fPIC. That being said it looks like all those static libraries
> are
> useless.
>
> Francois
>

François,

Just for reference, adding the -fPIC does allow building of  
sage-singular here. But sage will not install -- it can't find  
libsingular.so. I've gotten a similar error in attempts to remove  
Singular entirely. Sage appears to be very possessive of Singular.

Steve