CONFIG: consolidate C++ flags per compiler type

- easier to ensure that flags are consistent

wmake/rules/linuxARM64Arm/c

@@ -1,9 +1,9 @@
 SUFFIXES += .c
 
-cWARN       = -Wall
-
 cc          = armclang
 
+cWARN       = -Wall
+
 include $(DEFAULT_RULES)/c$(WM_COMPILE_OPTION)
 
 cFLAGS      = $(GFLAGS) $(cWARN) $(cOPT) $(cDBUG) $(LIB_HEADER_DIRS) -fPIC

wmake/rules/linuxARM64Arm/c++

@@ -1,22 +1,9 @@
-SUFFIXES += .C .cc .cpp .cxx
-
-c++WARN     = \
-    -Wall -Wextra -Wold-style-cast \
-    -Wnon-virtual-dtor -Wno-unused-parameter -Wno-invalid-offsetof \
-    -Wno-undefined-var-template \
-    -Wno-unknown-warning-option
-
-# Suppress some warnings for flex++ and CGAL
-c++LESSWARN = \
-    -Wno-old-style-cast -Wno-unused-local-typedefs \
-    -Wno-tautological-undefined-compare -Wno-shift-negative-value
+include $(GENERAL_RULES)/Clang/c++
 
 CC          = armclang++ -std=c++11
 
 include $(DEFAULT_RULES)/c++$(WM_COMPILE_OPTION)
 
-ptFLAGS     = -DNoRepository -ftemplate-depth-100
-
 c++FLAGS    = $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) $(LIB_HEADER_DIRS) -fPIC
 
 Ctoo        = $(WM_SCHEDULER) $(CC) $(c++FLAGS) -c $< -o $@

wmake/rules/linuxARM64Arm/general

@@ -3,7 +3,7 @@ CPP        = cpp -traditional-cpp $(GFLAGS)
 PROJECT_LIBS = -l$(WM_PROJECT) -ldl
 
 include $(GENERAL_RULES)/standard
+include $(GENERAL_RULES)/Clang/openmp
 
-include $(DEFAULT_RULES)/openmp
 include $(DEFAULT_RULES)/c
 include $(DEFAULT_RULES)/c++

wmake/rules/linuxARM64Arm/openmp

@@ -1,8 +0,0 @@
-# Flags for compiling/linking openmp
-# The USE_OMP is for OpenFOAM-specific use (general use is _OPENMP)
-# -
-# Clang provides 'omp' and a link for 'gomp'.
-# With 'gomp' we can use system libs.
-
-COMP_OPENMP = -DUSE_OMP -fopenmp
-LINK_OPENMP = -lgomp