diff -urN WRF-3.x.orig/arch/configure_new.defaults WRF-3.x/arch/configure_new.defaults
--- WRF-3.x.orig/arch/configure_new.defaults	2017-08-17 01:21:45.000000000 +0000
+++ WRF-3.x/arch/configure_new.defaults	2022-09-30 14:36:43.227894203 +0000
@@ -756,18 +756,18 @@
 CC_TOOLS        =      $(SCC) 
 
 ###########################################################
-#ARCH    Linux x86_64 ppc64le, gfortran compiler with gcc  #serial smpar dmpar dm+sm
+#ARCH    Linux x86_64 ppc64le, gfortran compiler with clang  #serial smpar dmpar dm+sm
 #
-DESCRIPTION     =       GNU ($SFC/$SCC)
+DESCRIPTION     =       BSD ($SFC/$SCC)
 DMPARALLEL      =       # 1
 OMPCPP          =       # -D_OPENMP
 OMP             =       # -fopenmp
 OMPCC           =       # -fopenmp
-SFC             =       gfortran
-SCC             =       gcc
-CCOMP           =       gcc
+SFC             =       flang
+SCC             =       clang
+CCOMP           =       clang
 DM_FC           =       mpif90 -f90=$(SFC)
-DM_CC           =       mpicc -cc=$(SCC)
+DM_CC           =       mpicc -cc=$(SCC) -DMPI2_SUPPORT
 FC              =       CONFIGURE_FC
 CC              =       CONFIGURE_CC
 LD              =       $(FC)