Linkage C and C++ files - c++

Question

I want to compile both the node.c,list.c and helper-functions.c with both the tests I built.
I'm sure I did not write my makefile as I should. Can you please check it out?
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
When I ran make, the output is:
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
There is definitly a reference to all those functions in node-test.cpp.
node-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);
}
the list-tests.cpp is similar to 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