MongoDB C driver on Mac OSX Lion

Question

I am trying to write a small C based client for mongo db for my application. Let me start by saying that I haven't programmed in C in a long time now, so may be the problem I am facing is a very basic one! I just can not get my code to compile :-)

I am using a 64 bit Apple Macbook Pro (OSX Lion). The gcc is:

Target: i686-apple-darwin11
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)

I git cloned the mongo c driver, did a git checkout to 0.6 and then ran make.

make
make install
make test

The tests ran fine and the libraries were installed correctly in /usr/local/lib/ with the .h files going correctly to /usr/local/include.

Then I copy pasted a piece of code into a file called data.c as follows:

#include <stdio.h>
#include "mongo.h"

int main() {
  mongo conn[1];
  int status = mongo_connect(conn, "127.0.0.1", 27017);
  return 0;
}

Nothing fancy, just trying to open a connection. When I try to compile this, I get the following error:

gcc --std=c99 -I/usr/local/include -L/usr/local/lib -o data data.c -lmongoc

Undefined symbols for architecture x86_64:
  "_mongo_connect", referenced from:
      _main in ccjPPPVs.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

What am I doing wrong?

Maybe this helps: http://stackoverflow.com/questions/8034568/undefined-symbols-for-architecture-x86-64-which-architecture-should-i-use — Aafreen Sheikh, Jul 18 '12 at 12:40
nope. whats strange is that the tests work but my code doesn't even compile with the same gcc :( — aishwarya, Jul 18 '12 at 12:53
yes, the tests are on [github](https://github.com/mongodb/mongo-c-driver/tree/master/test) and I have posted the test output on [pastebin](http://pastebin.com/wW0Kf1Bj) — aishwarya, Jul 18 '12 at 14:05

score 2 · Accepted Answer · answered Jul 28 '12 at 03:22

2

The Mongo-C-driver dynamic library build is now fixed for Mac OS X (Lion), see

https://github.com/mongodb/mongo-c-driver/commit/ea89d8fa966ccf601a67e1507e67e829775f6bcb

https://jira.mongodb.org/browse/CDRIVER-158

answered Jul 28 '12 at 03:22

Gary Murakami

3,392
1
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geakie · Answer 2 · 2012-07-19T10:00:59.233

1

There seems to be an issue on the mac - link against the static library instead.

edited Jul 19 '12 at 10:00

answered Jul 18 '12 at 21:04

geakie

1,458
9
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with static i get `ld: library not found for -lcrt0.o` – aishwarya Jul 19 '12 at 13:09

MongoDB C driver on Mac OSX Lion

2 Answers2