# A sample Makefile for building Google Test and using it in user# tests.  Please tweak it to suit your environment and project.  You# may want to move it to your project's root directory.## SYNOPSIS:##   make [all]  - makes everything.#   make TARGET - makes the given target.#   make clean  - removes all files generated by make.# Please tweak the following variable definitions as needed by your# project, except GTEST_HEADERS, which you can use in your own targets# but shouldn't modify.# Points to the root of Google Test, relative to where this file is.# Remember to tweak this if you move this file.GTEST_DIR = ..# Where to find user code.USER_DIR = ../samples# Flags passed to the preprocessor.CPPFLAGS += -I$(GTEST_DIR)/include# Flags passed to the C++ compiler.CXXFLAGS += -g -Wall -Wextra# All tests produced by this Makefile.  Remember to add new tests you# created to the list.TESTS = sample1_unittest# All Google Test headers.  Usually you shouldn't change this# definition.GTEST_HEADERS = $(GTEST_DIR)/include/gtest/*.h \                $(GTEST_DIR)/include/gtest/internal/*.h# House-keeping build targets.all : $(TESTS)clean :    rm -f $(TESTS) gtest.a gtest_main.a *.o# Builds gtest.a and gtest_main.a.# Usually you shouldn't tweak such internal variables, indicated by a# trailing _.GTEST_SRCS_ = $(GTEST_DIR)/src/*.cc $(GTEST_DIR)/src/*.h $(GTEST_HEADERS)# For simplicity and to avoid depending on Google Test's# implementation details, the dependencies specified below are# conservative and not optimized.  This is fine as Google Test# compiles fast and for ordinary users its source rarely changes.gtest-all.o : $(GTEST_SRCS_)    $(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \            $(GTEST_DIR)/src/gtest-all.ccgtest_main.o : $(GTEST_SRCS_)    $(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \            $(GTEST_DIR)/src/gtest_main.ccgtest.a : gtest-all.o    $(AR) $(ARFLAGS) $@ $^gtest_main.a : gtest-all.o gtest_main.o    $(AR) $(ARFLAGS) $@ $^# Builds a sample test.  A test should link with either gtest.a or# gtest_main.a, depending on whether it defines its own main()# function.sample1.o : $(USER_DIR)/sample1.cc $(USER_DIR)/sample1.h $(GTEST_HEADERS)    $(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sample1.ccsample1_unittest.o : $(USER_DIR)/sample1_unittest.cc \                     $(USER_DIR)/sample1.h $(GTEST_HEADERS)    $(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sample1_unittest.ccsample1_unittest : sample1.o sample1_unittest.o gtest_main.a    $(CXX) $(CPPFLAGS) $(CXXFLAGS)  $^ -o $@ -lpthread #<------------DIFF