Hi, I'm trying to build a Petsc DLL on Windows by making very small tweaks to the standard way of configuring/building as far as possible. It is working and I can run some user code using the DLL.
The problem (which I can avoid locally) is due to non-exported petsc MPIUNI global symbols. For example, functions like the one below are not exported because instead of using the macro PETSC_EXTERN they use extern. And PETSC_EXTERN can be expanded to __declspec(dllexport) via compile time macros. #define MPI_Comm_size Petsc_MPI_Comm_size extern int MPI_Comm_size(MPI_Comm,int*); Since these are called in the user code, they need to be exported. One way is to change mpi.h, and the other way is to use a module definition file while creating the DLL, which adds the required MPIUNI symbols separately. Can petsc's default mpi.h be changed to use PETSC_EXTERN instead of extern for symbols supposed to be exported? Thanks, Chetan
