链接 C 和 C++ 文件

Question

我想用我构建的两个测试编译 node.c、list.c 和 helper-functions.c。

我确定我没有按我应该的方式编写我的 makefile。 你能检查一下吗？

CFLAGS= -Wall -Wvla -Werror
CXXFLAGS= -lgtest -lgtest_main -pthread

all:
    mkdir -p build
    gcc -c node.c  $(CFLAGS) -o build/node.o
    gcc -c list.c  $(CFLAGS) -o build/list.o 
    gcc -c tests/helper-functions.c -o build/helper-functions.o
    g++ tests/node-tests.cpp $(CXXFLAGS) -o build/node-tests.o
    g++ tests/list-tests.cpp $(CXXFLAGS) -o build/list-tests.o
    g++ build/list.o build/node.o build/helper-functions.o build/node-tests.o build/list-tests.o -o build/tests.out
    ./build/tests.out

当我运行make时，输出为：

mkdir -p build
gcc -c node.c  -Wall -Wvla -Werror -o build/node.o
gcc -c list.c  -Wall -Wvla -Werror -o build/list.o 
gcc -c tests/helper-functions.c -o build/helper-functions.o
g++ tests/node-tests.cpp -lgtest -lgtest_main -pthread -o build/node-tests.o
/tmp/ccFTgPVe.o: In function `CreateNode_FirstTest_Test::TestBody()':
node-tests.cpp:(.text+0x21): undefined reference to `createNode'
node-tests.cpp:(.text+0x31): undefined reference to `data'
node-tests.cpp:(.text+0x108): undefined reference to `next'
node-tests.cpp:(.text+0x1db): undefined reference to `freeNode'
collect2: error: ld returned 1 exit status
make: *** [all] Error 1

在 node-test.cpp.

中肯定引用了所有这些函数

节点-tests.cpp:

extern "C"
{
    #include "../../../../headers/list.h"
    #include "../../../../headers/node.h"
    #include "helper-functions.h"
    #include <assert.h>
}
#include "gtest/gtest.h"
#include <iostream>
#include <cstdlib>
#include <string>


// Node* CreateNode(void* data,const size_t dataLength,void* deepCopy(void*,const size_t));

TEST(CreateNode, FirstTest) {

    int x=10;
    Node* pos=createNode(&x,sizeof(x));
    EXPECT_TRUE(*(int*)data(pos)==x);
    EXPECT_TRUE(next(pos)==NULL);
    freeNode(pos);
}

list-tests.cpp 类似于 node-tests.cpp.

Answer 1

CFLAGS= -Wall -Wvla -Werror
CXXFLAGS= -lgtest -lgtest_main -pthread

all:
    mkdir -p build
    gcc -c node.c $(CFLAGS) -o build/node.o
    gcc -c list.c $(CFLAGS) -o build/list.o 
    gcc -c tests/helper-functions.c $(CFLAGS) -o build/helper-functions.o
    g++ -c tests/node-tests.cpp -o build/node-tests.o //added -c, removed $(CXXFLAGS)
    g++ -c tests/list-tests.cpp -o build/list-tests.o // added -c, $(CXXFLAGS)
    g++ build/list.o build/node.o build/helper-functions.o build/node-tests.o build/list-tests.o $(CXXFLAGS) -o build/tests.out // added $(CXXFLAGS)
    ./build/tests.out

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