Actually, that means libcliquer is not installed as a dependency of nauty. 
Those symbols are supposed to be from libcliquer.

> On 28/04/2022, at 03:43, Dima Pasechnik <[email protected]> wrote:
> 
> 
> 
> On Wed, 27 Apr 2022, 16:26 David Joyner, <[email protected]> wrote:
> On Wed, Apr 27, 2022 at 10:44 AM Dima Pasechnik <[email protected]> wrote:
> >
> > This looks like incompatiblity with system-wide nauty (I assume Sage 
> > installed its own nauty, right?/
> >
> > Can you uninstall the system nauty and try again?
> >
> 
> I don't see a system-wide nauty. I installed giac 1.6.0 using
> sudo apt install xcas
> but
> ./config.status --recheck && ./config.status
> make
> didn't seem to pick it up.
> 
> the system wide giac might come with libnauty, no? Anyway, the following are 
> errors from you log, and they are about 
> missing symbols in a copy of libnauty.so
> in /usr/lib
> 
> So you do have it there....
> 
> 
> 619 /usr/bin/ld: /usr/lib/gcc/x86_64-linux
>     -gnu/11/../../../x86_64-linux-gnu/libn
>     auty.so: undefined reference to `graph
>     _free@CLIQUER_1'                      
> 620 /usr/bin/ld: /usr/lib/gcc/x86_64-linux
>     -gnu/11/../../../x86_64-linux-gnu/libn
>     auty.so: undefined reference to `cliqu
>     e_unweighted_find_single@CLIQUER_1'   
> 621 /usr/bin/ld: /usr/lib/gcc/x86_64-linux
>     -gnu/11/../../../x86_64-linux-gnu/libn
>     auty.so: undefined reference to `graph
>     _new@CLIQUER_1'   
> 
> 
> 
> 
> 
> > On Wed, 27 Apr 2022, 14:57 David Joyner, <[email protected]> wrote:
> >>
> >> Hi:
> >>
> >> On a Ubuntu 21.10 laptop, I got this:
> >>
> >> The following package(s) may have failed to build (not necessarily
> >> during this run of 'make all-start'):
> >> * package:         giac-1.6.0.47p3.p0
> >>
> >> The log file is attached.
> >>
> >> - David Joyner
> >>
> >> On Mon, Apr 25, 2022 at 6:48 PM Volker Braun <[email protected]> wrote:
> >> >
> >> > As always, you can get the latest beta version from the "develop" git 
> >> > branch. Alternatively, the self-contained source tarball is at 
> >> > http://www.sagemath.org/download-latest.html
> >> >
> >> > 67c34fee1d (trac/develop, tag: 9.6.rc2) Updated SageMath version to 
> >> > 9.6.rc2
> >> > 9b2069cf00 Trac #33747: Fix workflow build.yml
> >> > b9dce970ea Trac #33746: Upgrade virtualenv, fix missing dependencies
> >> > 8b27cf35a9 Trac #33738: Standard package beautifulsoup4 is missing a 
> >> > dependency
> >> > 7950f93e7c Trac #33588: warnings to ignore are not ignored when a 
> >> > doctest is tagged with # tol
> >> > a68c14444a Trac #33729: Latex display of integer mod ring is broken
> >> > 14be90c7b8 Trac #33724: GH Actions: Use 
> >> > --enable-download-from-upstream-url in build, doc-build workflows
> >> > 4c9e563885 Trac #33722: symengine: Fix install script
> >> > f1c3da866a Trac #33694: Developer manual: Remove mention of 
> >> > SAGE_ROOT/src/module_list.py
> >> > fbe3865362 Trac #33672: python3 spkg-configure.m4: Suppress output
> >> > 3285e374b4 Trac #33666: Mutable polyhedron (ppl) saves incorrect 
> >> > Vrepresentation
> >> > a00769f3a1 Trac #33648: Update/reorder git instructions in Developer's 
> >> > Guide
> >> > 121b0a8dd6 Trac #33592: do not use temp file with jupyter nb by default
> >> > 781a14a17d Trac #33521: doctesting with pytest fails on system install 
> >> > of sage
> >> > 79dc3dfb7c Trac #33088: More updates for installation and developer 
> >> > guides
> >> > b5a7bd11a3 Trac #33078: Update package info for system python3 on Cygwin
> >> > ad69a5b07b (tag: 9.6.rc1) Updated SageMath version to 9.6.rc1
> >> >
> >> > --
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