On Wed, 16 Mar 2022, Matthew Knepley wrote: > > Question 2) In the case PETSc, is there any problem if run “make” and > > “make install” without specifying PETSC_ARCH? > > > > It will choose an ARCH if you do not specify one.
With a prefix build - think of PETSC_ARCH as an intermediate build location - before the final install at the prefix location. And after 'make install' one should point PETSC_DIR to this prefix location [if using PETSc formatted makefiles] - and PETSC_ARCH is not used (or required) anymore. Satish
