Dear, Colleagues,
I tried to run the code from Step-40's webpage,
https://www.dealii.org/current/doxygen/deal.II/step_40.html
However, I encountered errors: error: ‘LinearAlgebraPETSc’ is not a
namespace-name
using namespace ::LinearAlgebraPETSc;
So I compared the code from the locally installed file of Step-40 and found
there is a slight difference:
Webpage:
namespace LA
{
#if defined(DEAL_II_WITH_PETSC) && !defined(DEAL_II_PETSC_WITH_COMPLEX) && \
!(defined(DEAL_II_WITH_TRILINOS) && defined(FORCE_USE_OF_TRILINOS))
using namespace ::LinearAlgebraPETSc;
# define USE_PETSC_LA
#elif defined(DEAL_II_WITH_TRILINOS)
using namespace ::LinearAlgebraTrilinos;
#else
# error DEAL_II_WITH_PETSC or DEAL_II_WITH_TRILINOS required
#endif
} // namespace LA
Locally installed:
namespace LA
{
#if defined(DEAL_II_WITH_PETSC) && !defined(DEAL_II_PETSC_WITH_COMPLEX) && \
!(defined(DEAL_II_WITH_TRILINOS) && defined(FORCE_USE_OF_TRILINOS))
using namespace dealii::LinearAlgebraPETSc;
# define USE_PETSC_LA
#elif defined(DEAL_II_WITH_TRILINOS)
using namespace dealii::LinearAlgebraTrilinos;
#else
# error DEAL_II_WITH_PETSC or DEAL_II_WITH_TRILINOS required
#endif
} // namespace LAEnter code here...
I have highlighted the difference. After adding "dealii", the program can
be run successfully.
I guess maybe these are typos. I am new to deal.ii, so I am not sure my
guess is correct or not. I am just curious about this (no offence), because
I may miss some important point here.
Thank you very much for your attention!
Zhidong Brian Zhang
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