[petsc-dev] Example src/snes/tutorials/examples/ex15.c

[Jed Brown]

Travis Austin <austin at txcorp.com> writes:

> Hi,
>
> I've been trying to build/link src/snes/tutorials/examples/ex15.c for

src/snes/examples/tutorials/ex15.c

> the case that I have defined 'clanguage' to be C++ on the configure
> line.  I get the following error:
>
> Undefined symbols for architecture x86_64:
>   "SNESPicardComputeFunction(_p_SNES*, _p_Vec*, _p_Vec*, void*)",
>   referenced from:
>       _main in ex15.o "SNESPicardComputeJacobian(_p_SNES*, _p_Vec*,
>   _p_Mat**, _p_Mat**, MatStructure*, void*)", referenced from:
>       _main in ex15.o ld: symbol(s) not found for architecture x86_64
> collect2: ld returned 1 exit status make: [ex15] Error 1 (ignored)
> /bin/rm -f ex15.o

Thanks for the report.  The actual problem here is that we're not
defining this interface in a header because we _don't_ want it to be
used.  The right fix is to clean up the implementation so that
DMDASNESSetPicardLocal is all the user needs to call.