Using Lemur API in Linux (Ubuntu 10.10)

Recently, I’ve been doing some research on IR. It is inevitable to get long with some useful toolkits for convinience. The Lemur Project's software development philosophy emphasizes state-of-the-art accuracy, flexibility, and efficiency. Since I’ve told that this toolkit is more efficient in Linux OS, I try my best to conduct my experients in Ubuntu.

Writing a “makefile” file needs a lot of skills, and I learned it this morning and tried to find a specific pattern makefile for myself. This is my first makefile trial:

Then, I tried to use the Lemur API to write my own application using my-style makefile as follows:

#include "Index.hpp"
#include "IndexManager.hpp"

using namespace lemur::api;
using namespace std;

int main()
{
	cout << "----------Scan Posting-----------" << endl;
	char *indexPath = "/usr/local/lemur/index/apdata/apdata.index.key";
	Index *index = NULL;
	index = IndexManager::openIndex(indexPath);

	int termID;

	for(termID = 1; termID < index->termCountUnique(); termID ++)
	{
		cout << index->term(termID) << endl;
	}

	delete index;
	index = NULL;
	
	return 0;
}

At first, I met a wiered problem that:

error: ‘__atomic_add’ was not declare in /usr/local/lemur/include/indri/atomic.hpp

After referring to Official Forum, I thought it maybe caused by my g++ version, so I modified hpp file by adding comments on line 
45 and 47 and it finally worked. But after that, I got another error:

undefined reference to ‘lemur::api::IndexManager:: openIndex()…’

Again I refered to the forum, many Umass students came across the same problem. This is caused by configuration 
which is related to makefile, and I copied MakeFile.app from src folder, and just simply filled some blanks then it 
worked by using make -f Makefile.app. The MakeFile.app displays below: