diff --git a/opengl/tests/hwc/Android.mk b/opengl/tests/hwc/Android.mk
index d7d59c6..f83846b 100644
--- a/opengl/tests/hwc/Android.mk
+++ b/opengl/tests/hwc/Android.mk
@@ -16,19 +16,24 @@
 
 include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
 LOCAL_MODULE_TAGS := tests
 LOCAL_MODULE:= libhwcTest
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+LOCAL_CXX_STL := libc++
 LOCAL_SRC_FILES:= hwcTestLib.cpp
 LOCAL_C_INCLUDES += system/extras/tests/include \
-	$(call include-path-for, opengl-tests-includes)
+    $(call include-path-for, opengl-tests-includes) \
 
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
-
-include external/stlport/libstlport.mk
 include $(BUILD_STATIC_LIBRARY)
 
 include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE:= hwcStress
+LOCAL_MODULE_TAGS := tests
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+LOCAL_CXX_STL := libc++
 LOCAL_SRC_FILES:= hwcStress.cpp
 
 LOCAL_SHARED_LIBRARIES := \
@@ -48,20 +53,17 @@
 LOCAL_C_INCLUDES += \
     system/extras/tests/include \
     hardware/libhardware/include \
-	$(call include-path-for, opengl-tests-includes)
-
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
-
-LOCAL_MODULE:= hwcStress
-
-LOCAL_MODULE_TAGS := tests
-
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+    $(call include-path-for, opengl-tests-includes) \
 
 include $(BUILD_NATIVE_TEST)
 
 include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE:= hwcRects
+LOCAL_MODULE_TAGS := tests
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+LOCAL_CXX_STL := libc++
 LOCAL_SRC_FILES:= hwcRects.cpp
 
 LOCAL_SHARED_LIBRARIES := \
@@ -81,18 +83,17 @@
 LOCAL_C_INCLUDES += \
     system/extras/tests/include \
     hardware/libhardware/include \
-	$(call include-path-for, opengl-tests-includes)
-
-LOCAL_MODULE:= hwcRects
-
-LOCAL_MODULE_TAGS := tests
-
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+    $(call include-path-for, opengl-tests-includes) \
 
 include $(BUILD_NATIVE_TEST)
 
 include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE:= hwcColorEquiv
+LOCAL_MODULE_TAGS := tests
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+LOCAL_CXX_STL := libc++
 LOCAL_SRC_FILES:= hwcColorEquiv.cpp
 
 LOCAL_SHARED_LIBRARIES := \
@@ -112,18 +113,17 @@
 LOCAL_C_INCLUDES += \
     system/extras/tests/include \
     hardware/libhardware/include \
-	$(call include-path-for, opengl-tests-includes)
-
-LOCAL_MODULE:= hwcColorEquiv
-
-LOCAL_MODULE_TAGS := tests
-
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+    $(call include-path-for, opengl-tests-includes) \
 
 include $(BUILD_NATIVE_TEST)
 
 include $(CLEAR_VARS)
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+
+LOCAL_MODULE:= hwcCommit
+LOCAL_MODULE_TAGS := tests
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+LOCAL_CXX_STL := libc++
 LOCAL_SRC_FILES:= hwcCommit.cpp
 
 LOCAL_SHARED_LIBRARIES := \
@@ -143,12 +143,6 @@
 LOCAL_C_INCLUDES += \
     system/extras/tests/include \
     hardware/libhardware/include \
-	$(call include-path-for, opengl-tests-includes)
-
-LOCAL_MODULE:= hwcCommit
-
-LOCAL_MODULE_TAGS := tests
-
-LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
+    $(call include-path-for, opengl-tests-includes) \
 
 include $(BUILD_NATIVE_TEST)
diff --git a/opengl/tests/hwc/hwcTestLib.cpp b/opengl/tests/hwc/hwcTestLib.cpp
index 9b224e2..d5ce448 100644
--- a/opengl/tests/hwc/hwcTestLib.cpp
+++ b/opengl/tests/hwc/hwcTestLib.cpp
@@ -20,17 +20,18 @@
  * Utility library functions for use by the Hardware Composer test cases
  */
 
+#include <arpa/inet.h> // For ntohl() and htonl()
+
+#include <cmath>
 #include <sstream>
 #include <string>
 
-#include <arpa/inet.h> // For ntohl() and htonl()
-
 #include "hwcTestLib.h"
 
 #include "EGLUtils.h"
 
 // Defines
-#define NUMA(a) (sizeof(a) / sizeof(a [0]))
+#define NUMA(a) (sizeof(a) / sizeof((a)[0]))
 
 // Function Prototypes
 static void printGLString(const char *name, GLenum s);