+##
+## libvpx test directives
+##
+
+ifeq ($(CONFIG_UNIT_TESTS),yes)
+ifeq ($(CONFIG_EXTERNAL_BUILD),yes)
+ifeq ($(CONFIG_MSVS),yes)
+
+LIBVPX_TEST_SRCS=$(filter %_test.cc,$(call enabled,CODEC_SRCS))
+LIBVPX_TEST_BINS=$(sort $(LIBVPX_TEST_SRCS:.cc.o=))
+
+gtest.vcproj: $(SRC_PATH_BARE)/third_party/googletest/src/src/gtest-all.cc
+ @echo " [CREATE] $@"
+ $(SRC_PATH_BARE)/build/make/gen_msvs_proj.sh \
+ --lib \
+ --target=$(TOOLCHAIN) \
+ $(if $(CONFIG_STATIC_MSVCRT),--static-crt) \
+ --name=gtest \
+ --proj-guid=EC00E1EC-AF68-4D92-A255-181690D1C9B1 \
+ --ver=$(CONFIG_VS_VERSION) \
+ --src-path-bare="$(SRC_PATH_BARE)" \
+ --out=gtest.vcproj $(SRC_PATH_BARE)/third_party/googletest/src/src/gtest-all.cc \
+ -I. -I"$(SRC_PATH_BARE)/third_party/googletest/src/include" -I"$(SRC_PATH_BARE)/third_party/googletest/src"
+
+PROJECTS-$(CONFIG_MSVS) += gtest.vcproj
+
+define unit_test_vcproj_template
+$(notdir $(1:.cc=.vcproj)): $(SRC_PATH_BARE)/$(1)
+ @echo " [vcproj] $$@"
+ $$(SRC_PATH_BARE)/build/make/gen_msvs_proj.sh\
+ --exe\
+ --target=$$(TOOLCHAIN)\
+ --name=$(notdir $(1:.cc=))\
+ --ver=$$(CONFIG_VS_VERSION)\
+ $$(if $$(CONFIG_STATIC_MSVCRT),--static-crt) \
+ --out=$$@ $$(INTERNAL_CFLAGS) $$(CFLAGS) \
+ -I. -I"$(SRC_PATH_BARE)/third_party/googletest/src/include" \
+ -L. -l$(CODEC_LIB) -lwinmm -l$(GTEST_LIB) $$^
+endef
+
+$(foreach proj,$(LIBVPX_TEST_BINS),\
+ $(eval $(call unit_test_vcproj_template,$(proj))))
+
+PROJECTS-$(CONFIG_MSVS) += $(foreach proj,$(LIBVPX_TEST_BINS),\
+ $(notdir $(proj:.cc=.vcproj)))
+
+test::
+ @set -e; for t in $(addprefix Win32/Release/,$(notdir $(LIBVPX_TEST_BINS:.cc=.exe))); do $$t; done
+endif
+else
+
+include $(SRC_PATH_BARE)/third_party/googletest/gtest.mk
+GTEST_SRCS := $(addprefix third_party/googletest/src/,$(call enabled,GTEST_SRCS))
+GTEST_OBJS=$(call objs,$(GTEST_SRCS))
+$(GTEST_OBJS) $(GTEST_OBJS:.o=.d): CFLAGS += -I$(SRC_PATH_BARE)/third_party/googletest/src
+$(GTEST_OBJS) $(GTEST_OBJS:.o=.d): CFLAGS += -I$(SRC_PATH_BARE)/third_party/googletest/src/include
+OBJS-$(BUILD_LIBVPX) += $(GTEST_OBJS)
+LIBS-$(BUILD_LIBVPX) += $(BUILD_PFX)libgtest.a $(BUILD_PFX)libgtest_g.a
+$(BUILD_PFX)libgtest_g.a: $(GTEST_OBJS)
+
+LIBVPX_TEST_SRCS=$(filter %_test.cc,$(call enabled,CODEC_SRCS))
+LIBVPX_TEST_OBJS=$(call objs,$(LIBVPX_TEST_SRCS))
+$(LIBVPX_TEST_OBJS) $(LIBVPX_TEST_OBJS:.o=.d): CFLAGS += -I$(SRC_PATH_BARE)/third_party/googletest/src
+$(LIBVPX_TEST_OBJS) $(LIBVPX_TEST_OBJS:.o=.d): CFLAGS += -I$(SRC_PATH_BARE)/third_party/googletest/src/include
+LIBVPX_TEST_BINS=$(sort $(LIBVPX_TEST_OBJS:.cc.o=))
+OBJS-$(BUILD_LIBVPX) += $(LIBVPX_TEST_OBJS)
+
+$(foreach bin,$(LIBVPX_TEST_BINS),\
+ $(if $(BUILD_LIBVPX),$(eval $(bin): libvpx.a libgtest.a ))\
+ $(if $(BUILD_LIBVPX),$(eval $(call linkerxx_template,$(bin),\
+ $(bin).cc.o \
+ -L. -lvpx -lgtest -lpthread -lm)\
+ )))\
+ $(if $(LIPO_LIBS),$(eval $(call lipo_bin_template,$(bin))))\
+
+test:: $(LIBVPX_TEST_BINS)
+ @set -e; for t in $(LIBVPX_TEST_BINS); do $$t; done
+
+endif
+endif
+
+##
+## documentation directives
+##