<p></p>
<p>Hi Tobias,</p>
<pre><code>defines that alter system headers should be specified on the compiler command line, and hence belong in makefiles or project build specifications, etc.
</code></pre>
<p>Assuming one can safely alter the innards of a system include with defines in one's own header files is presuming a specific implementation and likely to break at a later time.  The only rational thing to do is include system headers first.  In this case I had made a mistake. I should have fixed it a long time ago.</p>

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