diff -Naur spack-src/build/linux.gcc.inc spack-src.patched/build/linux.gcc.inc
--- spack-src/build/linux.gcc.inc	2020-07-10 09:18:01.000000000 -0400
+++ spack-src.patched/build/linux.gcc.inc	2021-07-28 15:32:43.640185318 -0400
@@ -25,7 +25,9 @@
 WARNING_KEY = -Wall
 TEST_WARNING_KEY = -Wshadow -Wcast-qual -Woverloaded-virtual -Wnon-virtual-dtor
 
-WARNING_SUPPRESS = -Wno-parentheses
+# Skip for nvhpc compilers
+# WARNING_SUPPRESS = -Wno-parentheses
+WARNING_SUPPRESS = 
 DYLIB_KEY = -shared
 EXPORT_KEY = -Wl,--version-script,
 LIBDL = -ldl
@@ -57,12 +59,11 @@
     WARNING_SUPPRESS += -Wno-sized-deallocation
 endif
 
-# gcc 6.0 and later have -flifetime-dse option that controls
-# elimination of stores done outside the object lifetime
-ifneq (,$(shell $(CONLY) -dumpfullversion -dumpversion | egrep  "^([6-9]|1[0-9])"))
-    # keep pre-contruction stores for zero initialization
-    DSE_KEY = -flifetime-dse=1
-endif
+#Skip for nvhpc compilers
+#ifneq (,$(shell $(CONLY) -dumpfullversion -dumpversion | egrep  "^([6-9]|1[0-9])"))
+#    # keep pre-contruction stores for zero initialization
+#    DSE_KEY = -flifetime-dse=1
+#endif
 
 ifeq ($(cfg), release)
         # -g is set intentionally in the release mode. It should not affect performance.
@@ -149,7 +150,9 @@
 # Setting tbbmalloc data.
 #------------------------------------------------------------------------------
 
-M_CPLUS_FLAGS = $(CPLUS_FLAGS) -fno-rtti -fno-exceptions
+# Drop -fno-rtti for nvhpc compilers
+# M_CPLUS_FLAGS = $(CPLUS_FLAGS) -fno-rtti -fno-exceptions
+M_CPLUS_FLAGS = $(CPLUS_FLAGS) -fno-exceptions
 
 #------------------------------------------------------------------------------
 # End of setting tbbmalloc data.