I'm not entirely sure how to address this. I tried building the package in a qemu environment for riscv64 with and without the "-g1" option but in both cases the build took so long (12h+) that I couldn't even benchmark it properly.
The proposed solution doesn't really make sense to me, I do not see why adding -g1 would drastically affect the build time. I think RISCV64 is not a target environment for Siconos upstream, of course it would be nice if it works and it's a shame to kill the job during compilation, but if it's infeasible to compile it perhaps the right approach is to make it a amd64-only package. Note that the only reason parallel is disabled is that the build also takes far too much memory. The code is very C++ template heavy. In any case I have no problem adding this change if it's confirmed to fix the problem for now but it seems like a band-aid. Steve On Mon, Nov 24, 2025 at 7:21 PM Adrian Bunk <[email protected]> wrote: > > Source: siconos > Version: 4.4.0+dfsg-5 > Severity: serious > Tags: ftbfs patch > X-Debbugs-Cc: [email protected] > User: [email protected] > Usertags: riscv64 > > https://buildd.debian.org/status/fetch.php?pkg=siconos&arch=riscv64&ver=4.4.0%2Bdfsg-5&stamp=1763696177&raw=0 > > ... > [ 88%] Building CXX object > kernel/swig/CMakeFiles/_kernel.dir/__/__/wrap/siconos/kernelPYTHON_wrap.cxx.o > cd > /build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/kernel/swig > && /usr/bin/c++ -D_kernel_EXPORTS > -I/build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu > -I/build/reproducible-path/siconos-4.4.0+dfsg/wrap/swig > -I/build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/wrap/siconos > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/swig > -I/build/reproducible-path/siconos-4.4.0+dfsg/io/src > -I/build/reproducible-path/siconos-4.4.0+dfsg/io/src/mechanics > -I/build/reproducible-path/siconos-4.4.0+dfsg/io/src/serialization > -I/build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/io > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/. > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/tools > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/tools/InterfaceToPathFerris > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/tools/internal > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/AVI > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/LCP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/MLCP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/SOCP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/QP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/Relay > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/FrictionContact > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/FrictionContact/Generated > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/NCP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/MCP > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/GenericMechanical > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src/VI > -I/build/reproducible-path/siconos-4.4.0+dfsg/externals/tools > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/. > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/SiconosAlgebra > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/SiconosMemory > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/SiconosSharedLibrary > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/SiconosTools > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/ProgressBar > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/plugin > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/modelingTools > -I/build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/simulationTools > -I/build/reproducible-path/siconos-4.4.0+dfsg/numerics/src -isystem > /usr/include/python3.13 -isystem > /usr/lib/riscv64-linux-gnu/python3-numpy/numpy/_core/include -isystem > /usr/include/suitesparse -g -O2 > -ffile-prefix-map=/build/reproducible-path/siconos-4.4.0+dfsg=. > -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time > -D_FORTIFY_SOURCE=2 -std=gnu++17 -fPIC -fno-strict-aliasing -MD -MT > kernel/swig/CMakeFiles/_kernel.dir/__/__/wrap/siconos/kernelPYTHON_wrap.cxx.o > -MF CMakeFiles/_kernel.dir/__/__/wrap/siconos/kernelPYTHON_wrap.cxx.o.d -o > CMakeFiles/_kernel.dir/__/__/wrap/siconos/kernelPYTHON_wrap.cxx.o -c > /build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/wrap/siconos/kernelPYTHON_wrap.cxx > In file included from > /build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/wrap/siconos/kernelPYTHON_wrap.cxx:5414: > /build/reproducible-path/siconos-4.4.0+dfsg/kernel/src/utils/SiconosAlgebra/SiconosVectorIterator.hpp:30:17: > warning: ‘template<class _Category, class _Tp, class _Distance, class > _Pointer, class _Reference> struct std::iterator’ is deprecated > [-Wdeprecated-declarations] > 30 | : public std::iterator<std::forward_iterator_tag, T> > | ^~~~~~~~ > In file included from /usr/include/c++/15/bits/stl_algobase.h:65, > from /usr/include/c++/15/bits/specfun.h:43, > from /usr/include/c++/15/cmath:3913, > from /usr/include/c++/15/math.h:36, > from /usr/include/python3.13/Python.h:23, > from > /build/reproducible-path/siconos-4.4.0+dfsg/obj-riscv64-linux-gnu/wrap/siconos/kernelPYTHON_wrap.cxx:203: > /usr/include/c++/15/bits/stl_iterator_base_types.h:129:34: note: declared here > 129 | struct _GLIBCXX17_DEPRECATED iterator > | ^~~~~~~~ > E: Build killed with signal TERM after 720 minutes of inactivity > > > Workaround: > > --- siconos-4.4.0+dfsg/debian/rules 2025-11-19 17:55:47.000000000 +0200 > +++ siconos-4.4.0+dfsg/debian/rules 2025-11-22 21:13:29.000000000 +0200 > @@ -7,6 +7,11 @@ > > export DEB_BUILD_MAINT_OPTIONS=hardening=+bindnow > > +# avoid builds timing out on the buildds > +ifneq (,$(filter $(DEB_HOST_ARCH), riscv64)) > + export DEB_CXXFLAGS_MAINT_APPEND += -g1 > +endif > + > # If SALSABUILD is set we want to drop debug info as well > ifneq ($(SALSABUILD),) > export DEB_CXXFLAGS_MAINT_APPEND += -g0
