John, perhaps not what you&#39;re looking for since you mention you need to support multiple platforms, but just in case; gcc will automatically emit code in order to make functional local static initialization thread-safe.<div>

<div><br></div><div>This feature is on by default, but can be explicitly disabled:<br><div><br></div><div><dt style="color:rgb(0,0,0);font-family:&#39;Times New Roman&#39;;font-size:medium"><code>-fno-threadsafe-statics</code></dt>

<dd style="color:rgb(0,0,0);font-family:&#39;Times New Roman&#39;;font-size:medium"><a name="index-fno_002dthreadsafe_002dstatics-160"></a>Do not emit the extra code to use the routines specified in the C++ ABI for thread-safe initialization of local statics. You can use this option to reduce code size slightly in code that doesn&#39;t need to be thread-safe. </dd>

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