有没有办法将 JSONcpp 库与 C++ 代码链接？

Question

I used the python amalmagate file to compile the json library. Now when I run the c++ code, I keep getting this error.

/usr/bin/ld: msort.cc:(.text+0x255): undefined reference to Json::Value::~Value()' /usr/bin/ld: msort.cc:(.text+0x264): undefined reference to Json::Value::~Value()' /usr/bin/ld: msort.cc:(.text+0x278): undefined reference to Json::Value::operator[](int)' /usr/bin/ld: msort.cc:(.text+0x28c): undefined reference to Json::Value::Value(char const*)' /usr/bin/ld: msort.cc:(.text+0x2a7): undefined reference to `Json::Value::get(char const*, Json::Value const&) const'

This is what I used to download the jsoncpp library

git clone https://github.com/open-source-parsers/jsoncpp.git

cd jsoncpp

python amalgamate.py

The code I ran to compile: g++ msort.cc -o msort

I understand that this means that the library is not connecting with my code. Any idea how I can fix this?

Answer 1

If you read the instructions for the amalgamated library you will see that you need to build with the library source file dist/jsoncpp.cpp :

g++ msort.cc dist/jsoncpp.cpp -o msort