On Wed, Nov 7, 2012 at 2:09 PM, Matthias Kilian <span dir="ltr">&lt;<a href="mailto:kili@outback.escape.de" target="_blank">kili@outback.escape.de</a>&gt;</span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

Small safety hint for distributors: the haskell-platform.cabal file<br>
mandates network == 2.3.1.0 and HTTP == 4000.2.5, but the latter<br>
by default depends on  network &gt;= 2.4 &amp;&amp; &lt; 2.5. So if you want to<br>
avoid to include the same package in different versions (which at<br>
least OpenBSD does), you&#39;ll have to configure HTTP with -fnetwork23<br>
(which changes the dependency to network &lt; 2.4).<br></blockquote><div><br></div><div> I think HTTP can solve this in a better way, instead of using</div><div><br></div><div><div>    #ifdef NETWORK23</div><div>    uriDefaultTo a b = maybe a id (a `relativeTo` b)</div>

<div>    #else</div><div>    uriDefaultTo a b = a `relativeTo` b</div><div>    #endif</div></div><div><br></div><div>it could use</div><div><br></div><div><div>    #ifdef MIN_VERSION_network(2,4,0)</div><div>    uriDefaultTo a b = a `relativeTo` b</div>

<div>    #else</div><div>    uriDefaultTo a b = maybe a id (a `relativeTo` b)</div><div>    #endif</div></div><div><br></div><div>That way it will compile on both old and new network versions without any user interventions (including cabal flag).</div>

<div><br></div><div>-- Johan</div><div><br></div></div>