问题
gtest1.6版本的README里说该版本不支持make install，其意思就是说你没法通过make命令把gtest安装到/usr/local/lib之类的目录，所以你也没办法通过下面的命令来编译测试程序，那么该怎么使用gtest呢？
g++ -lgtest -L /usr/local/lib -I gtest.h test.c
方案
假定已经把源码解压到当前用户的主目录下并且已经成功编译了，在gtest解压目录里有一个make目录(~/gtest-1.6.0/make)，里面有一个Makefile文件，这个make脚本会使用同级别的sample目录下(~/gtest-1.6.0/sample)的源码编译一个测试程序，那么我们可以把这个Makefile文件复制到我们的项目目录下，修改gtest路径信息，源码路径信息，以及源码的编译规则，不熟悉的同学需要补一下makefile的知识
GTEST_DIR = /home/lishujun/gtest-1.6. #已经完成编译好的gtest目录的绝对路径，不能使用相对路径 USER_DIR = . # 程序所在目录，写点号即可，上面写死路径是*的
如果这个过程你没犯错的话，直接在这个目录下执行make命令就能看见一个亲切的可执行文件啦
补充
不过如果不把gtest放在系统的目录里我总觉得不爽，后来我尝试了一下把gtest放到系统的根目录（/gtest-1.6.0），修改GTEST_DIR发现也是可以的
源码
/home/lishujun/script/test/sum.h
#ifndef _SUM_H_
#define _SUM_H_ int sum(int a, int b); #endif
/home/lishujun/script/test/sum.c
#include "sum.h" int sum(int a, int b)
{
return a + b;
}
/home/lishujun/script/test/test_sum.c
#include <stdio.h>
#include "sum.h"
#include "gtest/gtest.h" TEST(SUM,ADD){
EXPECT_EQ(, sum(,));
}
/home/lishujun/script/test/Makefile
# 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 = /gtest-1.6.0 # Where to find user code.
USER_DIR = . # 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 = test_sum # 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.cc gtest_main.o : $(GTEST_SRCS_)
$(CXX) $(CPPFLAGS) -I$(GTEST_DIR) $(CXXFLAGS) -c \
$(GTEST_DIR)/src/gtest_main.cc gtest.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. sum.o : $(USER_DIR)/sum.c $(USER_DIR)/sum.h $(GTEST_HEADERS)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/sum.c test_sum.o : $(USER_DIR)/test_sum.c \
$(USER_DIR)/sum.h $(GTEST_HEADERS)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $(USER_DIR)/test_sum.c test_sum : sum.o test_sum.o gtest_main.a
$(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ -o $@ -lpthread
编译命令
cd ~/script/test
make
./test_sum
Makefile生成的编译命令（ubuntu12）
g++ -I/gtest-1.6./include -g -Wall -Wextra -c ./sum.c
g++ -I/gtest-1.6./include -g -Wall -Wextra -c ./test_sum.c
g++ -I/gtest-1.6./include -I/gtest-1.6. -g -Wall -Wextra -c \
/gtest-1.6./src/gtest-all.cc
g++ -I/gtest-1.6./include -I/gtest-1.6. -g -Wall -Wextra -c \
/gtest-1.6./src/gtest_main.cc
ar rv gtest_main.a gtest-all.o gtest_main.o
a - gtest-all.o
a - gtest_main.o
g++ -I/gtest-1.6./include -g -Wall -Wextra sum.o test_sum.o gtest_main.a -o test_sum -lpthread
自己生成lib，用简单的命令行生成测试程序
cd ~/gtest-1.6.
g++ -I./include -I./ -c ./src/gtest_main.cc
g++ -I./include -I./ -c ./src/gtest-all.cc
ar rv gtest_main.a gtest-all.o gtest_main.o
sudo cp gtest_main.a /usr/local/lib/gtest_main.a cd ~/script/test
g++ -c sum.c
g++ -c test_sum.c
g++ sum.o test_sum.o /usr/local/lib/gtest_main.a -lpthread
./a.out
生成libgtest，通过-lgtest进行引用
cd ~/gtest-1.6.
g++ -I./include -I./ -c ./src/gtest_main.cc
g++ -I./include -I./ -c ./src/gtest-all.cc
ar rv libgtest.a gtest-all.o gtest_main.o
sudo cp libgtest.a /usr/local/lib/ cd ~/script/test
g++ -c sum.c
g++ -c test_sum.c
g++ sum.o test_sum.o -lgtest -lpthread
./a.out
测试代码如果分散在多个文件里
g++ test.o sum.o test_sum.o -lgtest -lpthread
注意：
我记得之前如果要把库装到/usr/local/lib下是要刷新系统记录的，我不知道为什么这次没要刷新，如果要刷新，可以查看：