[R] unresolved symbols in dynamically linked code

[Jesús María Frías Celayeta]

Hi!
	I don't know if this can help, but the Splus package nls2 uses
actually lsoda to build models based in systems of odes which has been
developed by the INRA-BIA (France). There is also a port of this package (by
Denis Mestivier from University Paris 7) which is not complete, but is
capable of performing the nonlinear regression with an ode's system and
using the lsoda library. I think that having a look to that code might help
you to find a good solution for your problem (recycling is always good). The
web site is

	http://www-bia.inra.fr/J/AB/nls2/welcome.html

cheers,

IOsu

On Sat, 15 Apr 2000, Woodrow Setzer wrote:

> I'm probably misunderstanding something in "Writing R Extensions" version
> 1.0.0.  In the chapter on the R API, section 4.7, it is stated that the
> functions listed in R_ext/Linpack.h are available to users' Fortran code.
> I am developing a developing a library of ode solvers, based on lsoda and
> ddassl, and which in turn call some routines from linpack and double
> precision blas.  I originally developed the library including those
> routines, and got a functional shared library.  When I removed the
> routines listed in Linpack.h, dyn.load gave the error:
> 
> ...../call_lsoda.so: undefined symbol dgbfa_
> 
> Have I misunderstood the documentation, or do I need to do something
> special to resolve these symbols?  I am using R SHLIB to do the make, and
> am working on a Redhat Linux 6.1 machine.  When I set the option "verbose"
> to TRUE, I get the warning, "Explicit local dynamic loading not supported
> on this platform.  Using default."
> 
> --
> Woodrow Setzer
> Biostatistics and Research Support Staff
> National Health and Environmental Effects Laboratory, 
> U.S. Environmental Protection Agency
> Research Triangle Park, NC 27711
> 
> 
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