Fixed issue that occurs when using googlemock with gcc 6.

- See google/googletest#705

Signed-off-by: Christopher M. Cantalupo

test/Makefile.mk

@@ -180,6 +180,8 @@ test_geopm_test_LDADD = libgtest.a \
                         # end
 
 test_geopm_test_CPPFLAGS = $(AM_CPPFLAGS) -Iplugin
+test_geopm_test_CFLAGS = $(AM_CFLAGS) -fno-delete-null-pointer-checks
+test_geopm_test_CXXFLAGS = $(AM_CXXFLAGS) -fno-delete-null-pointer-checks
 if ENABLE_OPENMP
     test_geopm_static_modes_test_SOURCES = test/geopm_static_modes_test.cpp
     test_geopm_static_modes_test_LDADD = libgeopmpolicy.la
@@ -202,8 +204,8 @@ if ENABLE_MPI
                                 # end
 
     test_geopm_mpi_test_LDFLAGS = $(AM_LDFLAGS) $(MPI_CXXLDFLAGS)
-    test_geopm_mpi_test_CFLAGS = $(AM_CFLAGS) $(MPI_CFLAGS)
-    test_geopm_mpi_test_CXXFLAGS= $(AM_CXXFLAGS) $(MPI_CXXFLAGS)
+    test_geopm_mpi_test_CFLAGS = $(AM_CFLAGS) $(MPI_CFLAGS) -fno-delete-null-pointer-checks
+    test_geopm_mpi_test_CXXFLAGS= $(AM_CXXFLAGS) $(MPI_CXXFLAGS) -fno-delete-null-pointer-checks
 endif
 
 # Target for building test programs.

test/googletest.mk

@@ -84,7 +84,7 @@ libgmock.a: $(googlemock)/VERSION
 	    echo "Error: Failure to extract or download gmock archive" 2>&1; \
 	    exit -1; \
 	fi
-	$(CXX) $(CXXFLAGS) -isystem $(googlemock)/include -I$(googlemock) -isystem $(googletest)/include -I$(googletest) -pthread \
+	$(CXX) $(CXXFLAGS) -isystem $(googlemock)/include -I$(googlemock) -isystem $(googletest)/include -I$(googletest) -pthread -fno-delete-null-pointer-checks \
 	      -c $(googlemock)/src/gmock-all.cc
 	ar -rv libgmock.a gmock-all.o
 
@@ -93,7 +93,7 @@ libgtest.a: $(googlemock)/VERSION
 	    echo "Error: Failure to extract or download gmock archive" 2>&1; \
 	    exit -1; \
 	fi
-	$(CXX) $(CXXFLAGS) -isystem $(googletest)/include -I$(googletest) -pthread \
+	$(CXX) $(CXXFLAGS) -isystem $(googletest)/include -I$(googletest) -pthread -fno-delete-null-pointer-checks \
 	      -c $(googletest)/src/gtest-all.cc
 	ar -rv libgtest.a gtest-all.o