Doesn't compile with the latest nauty-27r3: relocation R_X86_64_PC32 cannot be used against symbol __stack_chk_guard

[yurivict]

(and maybe doesn't compile with any version of nauty.)

*** Warning: Linking the shared library libCouenne.la against the
*** static library /usr/local/lib/libnauty.a is not portable!
c++ -shared -nostdlib /usr/lib/crti.o /usr/lib/crtbeginS.o  .libs/CouenneBab.o .libs/BonCouenneSetup.o .libs/SmartAslDestr.o -Wl,--whole-archive ./interfaces/.libs/libCouenneInterfaces.a ./heuristics/.libs/libCouenneHeuristics.a ./problem/.libs/libCouenneProblem.a ./standardize/.libs/libCouenneStandardize.a ./expression/.libs/libCouenneExpression.a ./branch/.libs/libCouenneBranch.a ./convex/.libs/libCouenneConvex.a ./bound_tightening/.libs/libCouenneBoundTightening.a ./bound_tightening/twoImpliedBT/.libs/libCouenneTwoImplied.a ./util/.libs/libCouenneUtil.a ./disjunctive/.libs/libCouenneDisjunctive.a ./cut/crossconv/.libs/libCouenneCrossConv.a ./cut/sdpcuts/.libs/libCouenneSdpCuts.a -Wl,--no-whole-archive  -L/usr/local/lib -L/usr/local/lib/gcc10 /usr/local/lib/libnauty.a -lbonminampl -L/usr/local/bin -L/usr/local/lib/gcc10/gcc/x86_64-portbld-freebsd13.0/10.3.0 -L/usr/local/lib/gcc10/gcc/x86_64-portbld-freebsd13.0/10.3.0/../../../../../x86_64-portbld-freebsd13.0/lib -L/usr/local/lib/gcc10/gcc/x86_64-portbld-freebsd13.0/10.3.0/../../.. -lipoptamplinterface -lbonmin -lCbcSolver -lCbc -lnauty -lCgl -lOsi -lCoinUtils -lbz2 -lz -lopenblas -lOsiClp -lClpSolver -lClp -lcoinasl -lipopt -llapack -ldl -lcoinmumps -lblas -lgfortran -lssp_nonshared -lquadmath -lcoinmetis -L/usr/lib -lc++ -lm -lc -lgcc -lgcc_s /usr/lib/crtendS.o /usr/lib/crtn.o  -Wl,-rpath=/usr/local/lib/gcc10 -Wl,-soname -Wl,libCouenne.so.1 -o .libs/libCouenne.so.1.4.8
ld: error: relocation R_X86_64_PC32 cannot be used against symbol __stack_chk_guard; recompile with -fPIC
>>> defined in /lib/libc.so.7
>>> referenced by nauty.c
>>>               nauty.o:(nauty) in archive /usr/local/lib/libnauty.a

ld: error: relocation R_X86_64_PC32 cannot be used against symbol __stderrp; recompile with -fPIC
>>> defined in /lib/libc.so.7
>>> referenced by nauty.c
>>>               nauty.o:(nauty) in archive /usr/local/lib/libnauty.a

The core reason is that libnauty.a wasn't built with -fPIC and libnauty.so isn't generally available.

On a side note: nauty now provides the pkgconfig's .pc file. You can use it to discover nauty instead of --with-nauty-lib.

On FreeBSD we build libnauty.so in the port, so there's a workaround.
Otherwise the Nauty option in Couenne is probably generally broken due to the lack of libnauty.so.

You can ask the Nauty authors to build libnauty.so.

OS: FreeBSD 13

[svigerske]

So building a shared lib of Couenne with a static non-PIC version of the Nauty lib doesn't work. What should Coeunne do to fix the nauty lib?

Either build nauty with -fPIC (as the error message clearly says) or build Couenne as static lib, too (--disable-shared).

[yurivict]

I am just reporting the problem. Not sure what Couenne should or can do.

I think that they just removed -fPIC in nauty-27r3 - this triggered this problem. Installed static libraries generally are expected to have non-PIC code, so it is correct as it is now.

In the long run they should build lubnauty.so - this would fix the problem.