Linker error with Boost Threads in C++ in Xcode

Question

I have been trying to get a simple c++ program running that was given to me as an example of multi-thread programming. I know it runs on another machine with boost installed, but I am trying to run it in Xcode, and this is giving me some problems.

First I tried to run it with my existing version of boost. However I was getting many errors and after doing some research, found that I needed to update my boost version from 1.47 to 1.52 to fix a few known threading bugs contained in 1.47.

That fixed many of my errors, but was still throwing a few. SO I found out that I had to patch 1.52 using the patch found here: https://svn.boost.org/trac/boost/attachment/ticket/7671/libcpp_c11_numeric_limits.patch

After all that, I am still getting a linker error saying "Library not found for -lboost_thread"

Right now in Xcode, I have the following project settings: Under search paths, I have the header and library search paths set to "usr/local/include/" - - Under linking I have other linker flags set to "-lboost_thread"

I have both a lboost_thread.a and a lboost_thread.dylib located in usr/local/lib/. How do I make xCode find this, as It seems that should fix my problem.

Also if it helps here is the code I am running:

#include <iostream>
#include <boost/thread.hpp>

using namespace std;

void printNum(char c, int num)
{
    for(int i = 0; i < num; i++)
    {
        cout << c << i << endl;
    }
}

int main()
{
    cout << "Boost threads!" << endl;
    boost::thread t(printNum, 'b', 100);
    printNum('a', 100);
    cout << "Good bye!" << endl;
}

Image of Error:

Image showing the file in it's location:

Image showing my build settings:

Answer 1

我不知道为什么链接器找不到库，但是我可以告诉您如何规避库搜索的问题：将完整路径/usr/local/lib/libboost_thread.a添加到“其他链接器标志”构建设置中，不带-l或-L。

Answer 2

屏幕快照显示/usr/local/lib/libboost_thread.a ，建议使用-I/usr/local/lib/libboost_thread.a也许就是这样。