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POStatic initialization and destruction of a static library's globals not happening with g++
 

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    <p>Until some time ago, I thought a .a static library was just a collection of .o object files, just archiving them and not making them handled differently. But <strong>linking with a .o object and linking with a .a static library containing this .o object are apparently not the same</strong>. And I don't understand why...</p> <p>Let's consider the following source code files:</p> <pre><code>// main.cpp #include &lt;iostream&gt; int main(int argc, char* argv[]) { std::cout &lt;&lt; "main" &lt;&lt; std::endl; } </code></pre> <hr> <pre><code>// object.hpp #include &lt;iostream&gt; struct Object { Object() { std::cout &lt;&lt; "Object constructor called" &lt;&lt; std::endl; } ~Object() { std::cout &lt;&lt; "Object destructor called" &lt;&lt; std::endl; } }; </code></pre> <hr> <pre><code>// object.cpp #include "object.hpp" static Object gObject; </code></pre> <p>Let's compile and <strong>link</strong> and run this code:</p> <pre><code>g++ -Wall object.cpp main.cpp -o main1 ./main1 &gt; Object constructor called &gt; main &gt; Object destructor called </code></pre> <p>The constructor an the destructor of the global gObject object is called.</p> <p>Now let's create a <strong>static library</strong> from our code and use (link) it in another program:</p> <pre><code>g++ -Wall -c object.cpp main.cpp ar rcs lib.a object.o g++ -Wall -o main2 main.o lib.a ./main2 &gt; main </code></pre> <ul> <li><strong>gObject's constructor and destructor are not called... why?</strong></li> <li><strong>How to have them automatically called?</strong></li> </ul> <p>Thanks.</p>
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