Bug#983931: sagemath: ftbfs with -march=x86-64-v2

[Matthias Klose]

Package: src:sagemath
Version: 9.2-2
Severity: minor
User: debian-gcc at lists.debian.org
Usertags: ftbfs-x86-64-v2

Starting with LLVM 12 and GCC 11 (and backported to gcc-10 for Debian), 
GCC introduces optimizations for new micro-architecture levels from
the x86-64 psABI.  Filing these bug reports for packages building with
the current level (x86-64), but not with x86-64-v2.

To reproduce these issues, append -march=x86-64-v2 to the compiler
flags (CFLAGS, CXXFLAGS, ...).  You also need hardware supporting these.
The easiest way is to call the dynamic linker in glibc 2.33 like
  /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 --help
Otherwise look at the flags in /proc/cpuinfo and compare these with
those from table 3.1 in the System V Application Binary Interface doc:
https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/x86-64-psABI

Please don't upload a package setting these flags by default.  The
x86-64 baseline is still unchanged.

The full build log can be found at:
http://people.debian.org/~doko/logs/20210228/filtered/gcc10-v2/sagemath_9.2-2_unstable_gcc10-v2.log
The last lines of the build log are at the end of this report.

[...]
sage -t --long --random-seed=0 src/sage/schemes/elliptic_curves/ell_rational_field.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/schemes/elliptic_curves/ell_number_field.py  # 4 doctests failed
sage -t --long --random-seed=0 src/sage/schemes/elliptic_curves/kraus.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/schemes/elliptic_curves/ell_generic.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/schemes/elliptic_curves/gal_reps_number_field.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/symbolic/expression.pyx  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/structure/factorization.py  # 4 doctests failed
sage -t --long --random-seed=0 src/sage/arith/misc.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/modules/torsion_quadratic_module.py  # 3 doctests failed
sage -t --long --random-seed=0 src/sage/modules/fg_pid/fgp_element.py  # 8 doctests failed
sage -t --long --random-seed=0 src/sage/modules/fg_pid/fgp_module.py  # 30 doctests failed
sage -t --long --random-seed=0 src/sage/modules/fg_pid/fgp_morphism.py  # 5 doctests failed
sage -t --long --random-seed=0 src/sage/interacts/test_jupyter.rst  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/interfaces/tests.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/interfaces/giac.py  # 4 doctests failed
sage -t --long --random-seed=0 src/sage/interfaces/sympy.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/geometry/cone.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/geometry/polyhedron/library.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/geometry/polyhedron/base.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/matrix/matrix_double_dense.pyx  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/matrix/matrix_integer_dense.pyx  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/numerical/mip.pyx  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/lfunctions/pari.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/integer.pyx  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/finite_rings/residue_field.pyx  # 7 doctests failed
sage -t --long --random-seed=0 src/sage/rings/finite_rings/integer_mod_ring.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/finite_rings/finite_field_constructor.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/number_field_ideal.py  # 4 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/number_field.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/number_field/class_group.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/order.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/number_field/unit_group.py  # 10 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/S_unit_solver.py  # 8 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/number_field_element.pyx  # 3 doctests failed
sage -t --long --random-seed=0 src/sage/rings/number_field/number_field_ideal_rel.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/number_field/number_field_rel.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/rings/polynomial/polynomial_quotient_ring.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/polynomial/polynomial_element.pyx  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/rings/polynomial/pbori/randompoly.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/modular/local_comp/smoothchar.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/modular/local_comp/liftings.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/modular/modsym/p1list_nf.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/repl/image.py  # 4 doctests failed
sage -t --long --random-seed=0 src/sage/repl/ipython_kernel/interact.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/repl/ipython_kernel/install.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/repl/ipython_kernel/widgets_sagenb.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/combinat/cluster_algebra_quiver/interact.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/combinat/cluster_algebra_quiver/cluster_seed.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/combinat/cluster_algebra_quiver/quiver.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/finance/time_series.pyx  # 8 doctests failed
sage -t --long --random-seed=0 src/sage/groups/fqf_orthogonal.py  # 2 doctests failed
sage -t --long --random-seed=0 src/sage/groups/abelian_gps/abelian_group.py  # 1 doctest failed
sage -t --long --random-seed=0 src/sage/groups/additive_abelian/additive_abelian_group.py  # 10 doctests failed
sage -t --long --random-seed=0 src/sage/graphs/generators/families.py  # 1 doctest failed
----------------------------------------------------------------------
Total time for all tests: 909.1 seconds
    cpu time: 839.1 seconds
    cumulative wall time: 893.4 seconds
make[4]: Entering directory '/<<PKGBUILDDIR>>'
Error: 207 tests failed, up to 200 failures are tolerated
make[4]: *** [debian/rules:165: had-few-failures] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>'
make[3]: *** [debian/rules:202: override_dh_auto_test-arch] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>'
make[2]: *** [debian/rules:40: build] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: *** [debian/rules:40: install] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:40: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2