Public bug reported:

I share my debug on the arm64 issue.

1) deal.ii fails to use ld=GOLD on Ubuntu, while it succeeds in Debian,
so the arm64 link failure is just a problem hidden in Debian because
gold is correctly used.

this is what is done in the check to test if cxx and flags are usable:
cat main.cpp 
int main () { return 0; }


/usr/bin/c++   -DDEAL_II_HAVE_USABLE_FLAGS_DEBUG -pedantic -fPIC -Wall -Wextra 
-Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wsuggest-override -Wswitch 
-Wsynth -Wwrite-strings -Wno-placement-new -Wno-deprecated-declarations 
-Wno-literal-suffix -Wno-psabi -Wno-class-memaccess -std=c++17 -g -O2 
-fdebug-prefix-map=/deal.ii-9.1.1=. -fstack-protector-strong -Wformat 
-Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -Wno-nonnull-compare 
-Wno-address -Wno-unused-local-typedefs -O0 -ggdb -Wa,--compress-debug-sections 
   -rdynamic main.cpp  -o cmTC_10815 
-Wl,-rpath,/usr/lib/x86_64-linux-gnu/hdf5/openmpi:/usr/lib/x86_64-linux-gnu/openmpi/lib:/usr/lib/x86_64-linux-gnu/hdf5/openmpi/lib/lib
 -rdynamic -fuse-ld=gold -Wl,-Bsymbolic-functions -Wl,-z,relro -pthread 
-pthread -ggdb /usr/lib/x86_64-linux-gnu/libboost_iostreams.so 
/usr/lib/x86_64-linux-gnu/libboost_serialization.so 
/usr/lib/x86_64-linux-gnu/libboost_system.so 
/usr/lib/x86_64-linux-gnu/libboost_thread.so -pthread 
/usr/lib/x86_64-linux-gnu/libboost_regex.so 
/usr/lib/x86_64-linux-gnu/libboost_chrono.so 
/usr/lib/x86_64-linux-gnu/libboost_date_time.so 
/usr/lib/x86_64-linux-gnu/libboost_atomic.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_pike-blackbox.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_trilinoscouplings.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_piro.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_rol.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos_muelu.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos_ifpack2.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos_amesos2.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos_tpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos_sacado.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stokhos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_rythmos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_muelu-adapters.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_muelu-interface.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_muelu.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_moertel.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_locathyra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_locaepetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_localapack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_loca.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_noxepetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_noxlapack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_nox.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_phalanx.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_intrepid.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teko.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikosbelos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikosaztecoo.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikosamesos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikosml.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_stratimikosifpack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_ifpack2-adapters.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_ifpack2.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_anasazitpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_ModeLaplace.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_anasaziepetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_anasazi.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_komplex.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_amesos2.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_shylu.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_belostpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_belosepetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_belos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_ml.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_ifpack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_zoltan2.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_pamgen_extras.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_pamgen.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_amesos.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_galeri-xpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_galeri-epetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_aztecoo.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_dpliris.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_isorropia.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_optipack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_xpetra-sup.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_xpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_thyratpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_thyraepetraext.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_thyraepetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_thyracore.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_epetraext.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_trilinosss.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraext.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetrainout.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkostsqr.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassiclinalg.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassicnodeapi.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_tpetraclassic.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_triutils.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_globipack.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_shards.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_zoltan.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_epetra.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_sacado.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_rtop.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkoskernels.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchoskokkoscomm.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchoskokkoscompat.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchosremainder.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchosnumerics.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchoscomm.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchosparameterlist.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_teuchoscore.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkosalgorithms.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkoscontainers.so 
/usr/lib/x86_64-linux-gnu/libtrilinos_kokkoscore.so 
/usr/lib/x86_64-linux-gnu/libsmumps.so /usr/lib/x86_64-linux-gnu/libdmumps.so 
/usr/lib/x86_64-linux-gnu/libcmumps.so /usr/lib/x86_64-linux-gnu/libzmumps.so 
/usr/lib/x86_64-linux-gnu/libpord.so 
/usr/lib/x86_64-linux-gnu/libmumps_common.so 
/usr/lib/x86_64-linux-gnu/hdf5/openmpi/libhdf5.so 
/usr/lib/x86_64-linux-gnu/libtbb.so /usr/lib/x86_64-linux-gnu/libz.so 
/usr/lib/x86_64-linux-gnu/libptscotch.so 
/usr/lib/x86_64-linux-gnu/libptscotcherr.so 
/usr/lib/x86_64-linux-gnu/libscotch.so 
/usr/lib/x86_64-linux-gnu/libscotcherr.so -ldl 
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so 
/usr/lib/x86_64-linux-gnu/libumfpack.so /usr/lib/x86_64-linux-gnu/libcholmod.so 
/usr/lib/x86_64-linux-gnu/libccolamd.so /usr/lib/x86_64-linux-gnu/libcolamd.so 
/usr/lib/x86_64-linux-gnu/libcamd.so 
/usr/lib/x86_64-linux-gnu/libsuitesparseconfig.so 
/usr/lib/x86_64-linux-gnu/libamd.so -lrt 
/usr/lib/x86_64-linux-gnu/libparpack.so /usr/lib/x86_64-linux-gnu/libarpack.so 
/usr/lib/x86_64-linux-gnu/libassimp.so /usr/lib/x86_64-linux-gnu/libgsl.so 
/usr/lib/x86_64-linux-gnu/libgslcblas.so 
/usr/lib/x86_64-linux-gnu/hdf5/openmpi/lib/lib/libhdf5_hl.so 
/usr/lib/x86_64-linux-gnu/hdf5/openmpi/lib/lib/libhdf5.so 
/usr/lib/x86_64-linux-gnu/libmuparser.so 
/usr/lib/x86_64-linux-gnu/libnetcdf_c++.so 
/usr/lib/x86_64-linux-gnu/libnetcdf.so /usr/lib/x86_64-linux-gnu/libTKBO.so 
/usr/lib/x86_64-linux-gnu/libTKBool.so /usr/lib/x86_64-linux-gnu/libTKBRep.so 
/usr/lib/x86_64-linux-gnu/libTKernel.so /usr/lib/x86_64-linux-gnu/libTKFeat.so 
/usr/lib/x86_64-linux-gnu/libTKFillet.so /usr/lib/x86_64-linux-gnu/libTKG2d.so 
/usr/lib/x86_64-linux-gnu/libTKG3d.so 
/usr/lib/x86_64-linux-gnu/libTKGeomAlgo.so 
/usr/lib/x86_64-linux-gnu/libTKGeomBase.so 
/usr/lib/x86_64-linux-gnu/libTKHLR.so /usr/lib/x86_64-linux-gnu/libTKIGES.so 
/usr/lib/x86_64-linux-gnu/libTKMath.so /usr/lib/x86_64-linux-gnu/libTKMesh.so 
/usr/lib/x86_64-linux-gnu/libTKOffset.so /usr/lib/x86_64-linux-gnu/libTKPrim.so 
/usr/lib/x86_64-linux-gnu/libTKShHealing.so 
/usr/lib/x86_64-linux-gnu/libTKSTEP.so 
/usr/lib/x86_64-linux-gnu/libTKSTEPAttr.so 
/usr/lib/x86_64-linux-gnu/libTKSTEPBase.so 
/usr/lib/x86_64-linux-gnu/libTKSTEP209.so /usr/lib/x86_64-linux-gnu/libTKSTL.so 
/usr/lib/x86_64-linux-gnu/libTKTopAlgo.so 
/usr/lib/x86_64-linux-gnu/libTKXSBase.so /usr/lib/x86_64-linux-gnu/libp4est.so 
/usr/lib/x86_64-linux-gnu/libsc.so 
/usr/lib/x86_64-linux-gnu/libscalapack-openmpi.so 
/usr/lib/x86_64-linux-gnu/liblapack.so /usr/lib/x86_64-linux-gnu/libblas.so 
-lgfortran -lquadmath -lm -lc -lgcc_s -lgcc 
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_usempif08.so 
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_usempi_ignore_tkr.so 
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_mpifh.so 
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so 
/usr/lib/x86_64-linux-gnu/libslepc.so /usr/lib/x86_64-linux-gnu/libpetsc.so 
/usr/lib/x86_64-linux-gnu/libsundials_idas.so 
/usr/lib/x86_64-linux-gnu/libsundials_arkode.so 
/usr/lib/x86_64-linux-gnu/libsundials_kinsol.so 
/usr/lib/x86_64-linux-gnu/libsundials_nvecserial.so 
/usr/lib/x86_64-linux-gnu/libsundials_nvecparallel.so
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so: error: undefined reference 
to 'opal_class_init_epoch'
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so: error: undefined reference 
to 'opal_list_item_t_class'
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so: error: undefined reference 
to 'opal_class_initialize'
/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so: error: undefined reference 
to 'opal_uses_threads'
collect2: error: ld returned 1 exit status


So I presume as soon as openmpi is built with gcc-9 asneeded flag Debian will 
have the same failure.

** Affects: deal.ii (Ubuntu)
     Importance: Undecided
     Assignee: Graham Inggs (ginggs)
         Status: New

** Changed in: deal.ii (Ubuntu)
     Assignee: (unassigned) => Graham Inggs (ginggs)

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https://bugs.launchpad.net/bugs/1841577

Title:
  deal.ii FTBFS on arm64, bug in openmpi?

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