Are you using --download-mumps or pre-installed mumps? If using pre-installed - try --download-mumps.
If you still have issues - send us configure.log and make.log from the failed build. Satish On Mon, 30 Aug 2021, Sam Guo wrote: > Dear PETSc dev team, > I am compiling petsc 3.15.3 and got following compiling error > petsc/src/mat/impls/aij/mpi/mumps/mumps.c:52:31: error: missing binary > operator before token "(" > 52 | #if PETSC_PKG_MUMPS_VERSION_GE(5,3,0) > Any idea what I did wrong? > > Thanks, > Sam >