On Fri, Jun 20, 2008 at 3:41 PM, Anders Logg <[EMAIL PROTECTED]> wrote: > On Fri, Jun 20, 2008 at 06:08:04AM -0500, Matthew Knepley wrote: >> On Fri, Jun 20, 2008 at 3:13 AM, Ilmar Wilbers <[EMAIL PROTECTED]> wrote: >> > This issue keeps coming up again and again. >> > >> > The question is whether to use PETSC_TS_LIB or not. I think the last >> > email on this subject is this one: >> > http://article.gmane.org/gmane.comp.mathematics.fenics.dolfin/2124 >> >> 1) PETSc ONLY modifies a library to fix bugs which the maintainers refuse to >> fix,so you really should not be using an unmodified version. >> >> 2) I think we are fairly fast on updating to the latest version, and >> we always do >> it if someone asks. >> >> Matt > > Yes, but even so it's not a good idea that DOLFIN must depend on the > exact versions of libraries that PETSc chooses (however good that > reason may be). > > Say we have the following situation: > > A depends on B and C > B depends on C' > > where C' is a modified version of C. Then we shouldn't need to require > that A depends on C'. > > To be precise, we may take > > A = DOLFIN > B = PETSc > C = UMFPACK in Ubuntu > C' = UMFPACK modified by PETSc
What modifications other than bug fixes are you talking about? > DOLFIN should be able to depend on C and not on C'. > > This should all work fine as long as PETSc is built with > > --with-shared=1 > > because then there is a mechanism for resolving the dependencies. > > On the other hand, if PETSc is built with static libraries, then there > is no way to resolve this, other than forcing DOLFIN to use the same > libraries as PETSc. Right? Just force PETSc to use the version you want. It will work fine as long as the package has no outstanding bugs. Matt > -- > Anders > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.6 (GNU/Linux) > > iD8DBQFIXBXlQp2CVMGvcgcRAsBxAJ4+vWi+l9OZQedLiYN0DUf7+GM8bQCdH9Uv > CTGS4SVgEh5bq86fFGKhbM0= > =7IAK > -----END PGP SIGNATURE----- > > _______________________________________________ > DOLFIN-dev mailing list > [email protected] > http://www.fenics.org/mailman/listinfo/dolfin-dev > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener _______________________________________________ DOLFIN-dev mailing list [email protected] http://www.fenics.org/mailman/listinfo/dolfin-dev
