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POLinker error with Boost Threads in C++ in Xcode
 

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  1. POLinker error with Boost Threads in C++ in Xcode
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    <p>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. </p> <p>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. </p> <p>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: <a href="https://svn.boost.org/trac/boost/attachment/ticket/7671/libcpp_c11_numeric_limits.patch" rel="nofollow noreferrer">https://svn.boost.org/trac/boost/attachment/ticket/7671/libcpp_c11_numeric_limits.patch</a></p> <p>After all that, I am still getting a linker error saying "Library not found for -lboost_thread"</p> <p>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"</p> <p>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.</p> <p>Also if it helps here is the code I am running:</p> <pre><code>#include &lt;iostream&gt; #include &lt;boost/thread.hpp&gt; using namespace std; void printNum(char c, int num) { for(int i = 0; i &lt; num; i++) { cout &lt;&lt; c &lt;&lt; i &lt;&lt; endl; } } int main() { cout &lt;&lt; "Boost threads!" &lt;&lt; endl; boost::thread t(printNum, 'b', 100); printNum('a', 100); cout &lt;&lt; "Good bye!" &lt;&lt; endl; } </code></pre> <p>Image of Error: <img src="https://i.stack.imgur.com/ZbOdV.png" alt="Error"></p> <p>Image showing the file in it's location: <img src="https://i.stack.imgur.com/hCcc5.png" alt="libboost_thread.a"></p> <p>Image showing my build settings: <img src="https://i.stack.imgur.com/debJp.png" alt="xCode build settings"></p>
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      1. POLinker error with Boost Threads in C++ in Xcode
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    1. COIf you're using a recent version of Xcode you can set the standard library to libc++ and use the C++11 `<thread>` library instead of boost.
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      1. POLinker error with Boost Threads in C++ in Xcode
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    2. COYou say you have lboost_thread.a and lboost_thread.dylib. The names should be libboost_thread.a and libboost_thread.dylib.
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      1. POLinker error with Boost Threads in C++ in Xcode
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    3. CO@JWWalker They are, I just typed them wrong.
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      1. UStknickman
 

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