Hello, I'm trying to compile the PETSc library version 3.19.1 with OpenMPI 4.1.4 and the OneAPI 2022 Update 2 Intel Compiler suite on a Mac with OSX Ventura 13.3.1. I can compile PETSc in debug mode with this configure and make lines. I can run the PETSC tests, which seem fine. When I compile the library in optimized mode, either using -O3 or O1, for example configuring with: $ ./configure --prefix=/opt/petsc-oneapi22u3 --with-blaslapack-dir=/opt/intel/oneapi/mkl/2022.2.1 COPTFLAGS='-m64 -O1 -g -diag-disable=10441' CXXOPTFLAGS='-m64 -O1 -g -diag-disable=10441' FOPTFLAGS='-m64 -O1 -g' LDFLAGS='-m64' --with-debugging=0 --with-shared-libraries=0 --download-make and using mpicc (icc), mpif90 (ifort) from Open MPI, the static lib compiles. Yet, I see right off the bat this segfault error in the first PETSc example: $ make PETSC_DIR=/Users/mnv/Documents/Software/petsc-3.19.1 PETSC_ARCH=arch-darwin-c-opt test /Users/mnv/Documents/Software/petsc-3.19.1/arch-darwin-c-opt/bin/make --no-print-directory -f /Users/mnv/Documents/Software/petsc-3.19.1/gmakefile.test PETSC_ARCH=arch-darwin-c-opt PETSC_DIR=/Users/mnv/Documents/Software/petsc-3.19.1 test /opt/intel/oneapi/intelpython/latest/bin/python3 /Users/mnv/Documents/Software/petsc-3.19.1/config/gmakegentest.py --petsc-dir=/Users/mnv/Documents/Software/petsc-3.19.1 --petsc-arch=arch-darwin-c-opt --testdir=./arch-darwin-c-opt/tests Using MAKEFLAGS: --no-print-directory -- PETSC_ARCH=arch-darwin-c-opt PETSC_DIR=/Users/mnv/Documents/Software/petsc-3.19.1 CC arch-darwin-c-opt/tests/sys/classes/draw/tests/ex1.o In file included from /Users/mnv/Documents/Software/petsc-3.19.1/include/petscsys.h(44), from /Users/mnv/Documents/Software/petsc-3.19.1/src/sys/classes/draw/tests/ex1.c(4): /Users/mnv/Documents/Software/petsc-3.19.1/include/petscsystypes.h(68): warning #2621: attribute "warn_unused_result" does not apply here PETSC_ERROR_CODE_TYPEDEF enum PETSC_ERROR_CODE_NODISCARD { ^ CLINKER arch-darwin-c-opt/tests/sys/classes/draw/tests/ex1 TEST arch-darwin-c-opt/tests/counts/sys_classes_draw_tests-ex1_1.counts not ok sys_classes_draw_tests-ex1_1 # Error code: 139 # [excess:98681] *** Process received signal *** # [excess:98681] Signal: Segmentation fault: 11 (11) # [excess:98681] Signal code: Address not mapped (1) # [excess:98681] Failing at address: 0x7f # [excess:98681] *** End of error message *** # -------------------------------------------------------------------------- # Primary job terminated normally, but 1 process returned # a non-zero exit code. Per user-direction, the job has been aborted. # -------------------------------------------------------------------------- # -------------------------------------------------------------------------- # mpiexec noticed that process rank 0 with PID 0 on node excess exited on signal 11 (Segmentation fault: 11). # -------------------------------------------------------------------------- ok sys_classes_draw_tests-ex1_1 # SKIP Command failed so no diff I see the same segfault error in all PETSc examples. Any help is mostly appreciated, I'm starting to work with PETSc. Our plan is to use the linear solver from PETSc for the Poisson equation on our numerical scheme and test this on a GPU cluster. So also, any guideline on how to interface PETSc with a fortran code and personal experience is also most appreciated! Marcos