Mongo C++ Driver: mongo/client/dbclient.h: No such file or directory

Question

I am trying to install the MongoDB C++ driver on my machine. I have followed the directions here , and everything seemed to install successfully. Still, I can't seem to include the headers. Here is a simple test program:

#include <cstdlib>
#include <iostream>
#include "mongo/client/dbclient.h"

void run() {
  mongo::DBClientConnection c;
  c.connect("localhost");
}

int main() {
  try {
    run();
    std::cout << "connected ok" << std::endl;
  } catch(const mongo::DBException &e) {
    std::cout << "caught" << e.what() << std::endl;
  }

  return EXIT_SUCCESS;
}

Here are the errors I get:

g++ app/tutorial.cpp -pthread -lmongoclient -lboost_thread-mt -lboost_filesystem -lboost_program_options -lboost_system -o tutorial
app/tutorial.cpp:3:35: error: mongo/client/dbclient.h: No such file or directory
app/tutorial.cpp: In function ‘void run()’:
app/tutorial.cpp:6: error: ‘mongo’ has not been declared
app/tutorial.cpp:6: error: expected `;' before ‘c’
app/tutorial.cpp:7: error: ‘c’ was not declared in this scope
app/tutorial.cpp: In function ‘int main()’:
app/tutorial.cpp:14: error: ISO C++ forbids declaration of ‘mongo’ with no type
app/tutorial.cpp:14: error: expected `)' before ‘::’ token
app/tutorial.cpp:14: error: expected `{' before ‘::’ token
app/tutorial.cpp:14: error: ‘::DBException’ has not been declared
app/tutorial.cpp:14: error: ‘e’ was not declared in this scope
app/tutorial.cpp:14: error: expected `;' before ‘)’ token

Any help would be greatly appreciated.

Answer 1

The line app/tutorial.cpp:3:35: error: mongo/client/dbclient.h: No such file or directory indicates that g++ is having difficulty finding the installed headers. In the tutorial that you linked to, the box below the suggested compilation command states

You may need to use -I and -L to specify the locations of your mongo and boost headers and libraries.

I'll assume that the installation procedure placed your header files in /usr/local/include and libraries (eg libmongoclient.a ) in /usr/local/lib . Then, try adapting the compilation command to read

g++ -I/usr/local/include -L/usr/local/lib -pthread -lmongoclient -lboost_thread-mt -lboost_filesystem -lboost_program_options -lboost_system app/tutorial.cpp -o tutorial