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/singular-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.
Steve
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