[Ipopt] Library dependency issue?
stefan at vigerske.de
Sun Jun 1 10:03:18 EDT 2008
> When I build IPOPT, with just static linking to HSL routines, I end up
> with the following library dependencies:
> john at roadwork:~/Ipopt-3.4.0/Ipopt/examples/hs071_c$ ldd
> linux-gate.so.1 => (0xb7fb3000)
> libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7cea000)
> libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7bf7000)
> libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0xb7bd1000)
> libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7a82000)
> libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7a77000)
> /lib/ld-linux.so.2 (0xb7fb4000)
> However when I look at the missing symbols in the shared library, I see
> john at roadwork:~/Ipopt-3.4.0/Ipopt/examples/hs071_c$ nm !$ | grep gfort
> nm /usr/local/lib/libipopt.so | grep gfort
> U _gfortran_st_write
> U _gfortran_st_write_done
> U _gfortran_transfer_character
> U _gfortran_transfer_integer
> U _gfortran_transfer_real
> So it looks like IPOPT needs symbols from libgfortran, but it doesn't
> have a library dependency on libgfortran.so.X.
> This means that in order to use IPOPT correctly, I must always have
Yes, these kinds of flags are stored in the ipopt_addlibs_cpp.txt file
that is generated during the Ipopt build, see
It can be seen as a simple replacement of the ipopt-config script that
you proposed in the other posting.
> My understanding is that if IPOPT included its own
> dependency upon libgfortran.so.XXX then I wouldn't need to explicitly
> add this '-lgfortran' linkage myself. Furthermore, if the gfortran on my
> system were updated between the time that IPOPT were built and my
> program were linked to it, then it's possible that ABI incompatibilities
> between the gfortran libs could occur.
Yes, I agree that this could happen.
> I suspect that maybe there should be library dependencies on BLAS and
> LAPACK, as well, but maybe I'm wrong there.
If Lapack and Blas are installed on the system and these are used by
Ipopt, then the flags go into ipopt_addlibs_cpp.txt. Otherwise, that is
if Lapack and Blas from ThirdParty are build and used, then the libs are
included into the Ipopt library.
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