Question

这是我的makefile：

#Makefile
CC=g++
CFLAGS=-lcppunit
OBJS=Money.o MoneyTest.o

all : $(OBJS)
    $(CC) $(OBJS) -o TestUnitaire

#création des objets 
Money.o: Money.cpp Money.hpp
    $(CC) -c Money.cpp $(CFLAGS)

MoneyTest.o: MoneyTest.cpp Money.hpp MoneyTest.hpp
    $(CC) -c MoneyTest.cpp $(CFLAGS)

clean:
    rm *.o $(EXEC)

当我运行这个makefile时，我会收到类似的错误：

g ++ Money.o MoneyTest.o -o TestUnitaire Money.o：在函数main': Money.cpp:(.text+0x3c): undefined reference to CppUnit :: TestFactoryRegistry :: getRegistry（std :: basic_string，std :: allocator＆gt; const＆amp;）' Money.cpp :(。text + 0x78）：未定义引用CppUnit::TextTestRunner::TextTestRunner(CppUnit::Outputter*)' Money.cpp:(.text+0x8c): undefined reference to CppUnit :: TestRunner :: addTest（CppUnit :: Test *）' Money.cpp :(。text + 0x98）：未定义引用CppUnit::TextTestRunner::result() const' Money.cpp:(.text+0xec): undefined reference to CppUnit :: CompilerOutputter :: CompilerOutputter（CppUnit :: TestResultCollector *，std :: basic_ostream＆gt;＆amp;，std :: basic_string，std ::分配器＆gt; const＆amp;）' Money.cpp :(。text + 0xfc）：未定义引用CppUnit::TextTestRunner::setOutputter(CppUnit::Outputter*)' Money.cpp:(.text+0x168): undefined reference to CppUnit :: TextTestRunner :: run（std :: basic_string，std :: allocator＆gt;，bool，bool，bool）' Money.cpp :(。text + 0x1a5）：未定义引用CppUnit::TextTestRunner::~TextTestRunner()' Money.cpp:(.text+0x233): undefined reference to CppUnit :: TextTestRunner :: ~TextTestRunner（）'

似乎我的班级之间没有联系。有什么问题？

Answer 1

-lcppunit中的CFLAGS标志不正确，这是您放置C编译器标志的位置。您是（a）编译C ++程序，而不是C程序，（b）-l标志是链接器标志，而不是编译器标志。此外，CC变量保存C编译器。您应该将CXX变量用于C ++编译器。您的makefile应该类似于：

#Makefile
CXX = g++
LDLIBS = -lcppunit
OBJS = Money.o MoneyTest.o

all : TestUnitaire

TestUnitaire: $(OBJS)
        $(CXX) $^ -o $@ $(LDFLAGS) $(LDLIBS)

#création des objets
%.o : %.cpp
        $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ -c $<

Money.o: Money.hpp
MoneyTest.o: Money.hpp MoneyTest.hpp

clean:
        rm *.o $(EXEC)

makefile for cppunit

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