BTW: LIBS is more appropriate as its a difference of:

gcc -lstdc++ ex19.o -lpetsc
vs
gcc ex19.o -lpetsc -lstdc++

i.e

$CLINKER $CC_LINKER_FLAGS $OBJ $PETSC_LIB $LIBS
$FLINKER $FC_LINKER_FLAGS $OBJ $PETSC_LIB $LIBS

Satish

On Sat, 2 Oct 2021, Satish Balay via petsc-dev wrote:

>  --with-clib-autodetect=0 --with-fortranlib-autodetect=0 
> --with-cxxlib-autodetect=0
>  --CC_LINKER_FLAGS="-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now 
> -specs=/usr/lib/rpm/redhat/redhat-hardened-ld 
> -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 "
>  --FC_LINKER_FLAGS="-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now 
> -specs=/usr/lib/rpm/redhat/redhat-hardened-ld 
> -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -lgfortran" 
> 
> 
> Since autodetect is disabled - its expected the required compiler libraries 
> are passed in via LIBS or in this case CC_LINKER_FLAGS, FC_LINKER_FLAGS
> 
> i.e add -lstdc++ to both.
> 
> I'm surprised that you didn't need -lgfortran with CC_LINKER_FLAGS in there 
> as well - but get [as libpetsc.so is built with CLINKER]
> 
> >       libgfortran.so.5 => /lib64/libgfortran.so.5 (0x00007f00d9dde000)
> 
> 
> 
> Satish
> 
> On Sat, 2 Oct 2021, Antonio T. sagitter wrote:
> 
> > Hi all.
> > 
> > In PETSc-3.16.0, the linker is not working because of these undefined
> > references (see https://pastebin.com/izGTfmMp):
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to `operator
> > delete(void*, unsigned long)'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to `__cxa_rethrow'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to
> > `__gxx_personality_v0'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to `operator
> > new(unsigned long)'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to
> > `std::__throw_bad_alloc()'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to 
> > `std::terminate()'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to
> > `std::__throw_bad_array_new_length()'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to `typeinfo for
> > std::exception'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to
> > `__cxa_begin_catch'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to 
> > `__cxa_end_catch'
> > 
> > /usr/bin/ld: x86_64/lib/libpetsc.so: undefined reference to
> > `std::__throw_length_error(char const*)'
> > 
> > collect2: error: ld returned 1 exit status
> > 
> > There are also
> > 
> > $ ldd -r build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so'
> > Start: shell
> > 
> >     linux-vdso.so.1 (0x00007fffbf347000)
> > 
> >     libsuperlu.so.5.2 => /lib64/libsuperlu.so.5.2 (0x00007f00dad0c000)
> > 
> >     libflexiblas.so.3 => /lib64/libflexiblas.so.3 (0x00007f00da95a000)
> > 
> >     libcgns.so.4.2 => /lib64/libcgns.so.4.2 (0x00007f00da873000)
> > 
> >     libhdf5.so.103 => /lib64/libhdf5.so.103 (0x00007f00da4d8000)
> > 
> >     libm.so.6 => /lib64/libm.so.6 (0x00007f00da3f8000)
> > 
> >     libX11.so.6 => /lib64/libX11.so.6 (0x00007f00da2ae000)
> > 
> >     libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f00da294000)
> > 
> >     libc.so.6 => /lib64/libc.so.6 (0x00007f00da08b000)
> > 
> >     libgfortran.so.5 => /lib64/libgfortran.so.5 (0x00007f00d9dde000)
> > 
> >     libquadmath.so.0 => /lib64/libquadmath.so.0 (0x00007f00d9d94000)
> > 
> >     /lib64/ld-linux-x86-64.so.2 (0x00007f00dc18b000)
> > 
> >     libsz.so.2 => /lib64/libsz.so.2 (0x00007f00d9d8a000)
> > 
> >     libz.so.1 => /lib64/libz.so.1 (0x00007f00d9d6e000)
> > 
> >     libxcb.so.1 => /lib64/libxcb.so.1 (0x00007f00d9d43000)
> > 
> >     libXau.so.6 => /lib64/libXau.so.6 (0x00007f00d9d3d000)
> > 
> > undefined symbol: _ZTISt9exception
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: __gxx_personality_v0
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _ZdlPvm
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: __cxa_rethrow
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _Znwm
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _ZSt17__throw_bad_allocv
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _ZSt9terminatev
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _ZSt28__throw_bad_array_new_lengthv
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: __cxa_begin_catch
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: __cxa_end_catch
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > undefined symbol: _ZSt20__throw_length_errorPKc
> > (build/BUILD/petsc-3.16.0/petsc-3.16.0/x86_64/lib/libpetsc.so)
> > 
> > 
> > 
> > I'm attaching configure.log and make.log
> > 
> > --
> > ---
> > Antonio Trande
> > Fedora Project
> > mailto: sagit...@fedoraproject.org
> > GPG key: 0x29FBC85D7A51CC2F
> > GPG key server: https://keyserver1.pgp.com/
> > 
> > 
> 

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