<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On 28 October 2014 09:34, Jakub Zakrzewski <span dir="ltr"><<a href="mailto:jzakrzewski@e2e.ch" target="_blank">jzakrzewski@e2e.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





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<p class="MsoNormal" style="margin-bottom:12pt"><span style="color:rgb(31,73,125)">> </span>
I have a situation where I need to prefer a custom-build of a library over any system-installed versions. I understand that the paths in the HINTS variable will be searched before the
<span style="color:rgb(31,73,125)">> </span>system ones, but the documentation discourages its use with hard-coded paths.<u></u><u></u></p>
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<p class="MsoNormal"><span style="color:rgb(31,73,125)">> </span>If I do hard-code a HINTed path, what problems would that cause?
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<span style="color:rgb(31,73,125)"><u></u><u></u></span></p>
</span><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">It's "just" a best practise. Someone smarter has come up with the right order and it looks sensible to me. I'd suggest, that you do your search in two steps:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">find_path( MY_FILE<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NAMES "my_file.txt"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  PATHS<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  "/the/file/is/here"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">"/or/maybe/here"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_DEFAULT_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_CMAKE_ENVIRONMENT_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_CMAKE_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_SYSTEM_ENVIRONMENT_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_CMAKE_SYSTEM_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NO_CMAKE_FIND_ROOT_PATH<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">find_path( MY_FILE<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">  NAMES "my_file.txt"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)">If the file is found wit the first call, then CMake won't try to find it again. Otherwise it'll proceed with standard search (second call).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Courier New";color:rgb(31,73,125)" lang="PL">--<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Courier New";color:rgb(31,73,125)" lang="PL">Gruesse,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Courier New";color:rgb(31,73,125)" lang="PL">Jakub<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)"><u></u> <u></u></span></p>
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</blockquote></div>I would very much like to know the actual technical reason behind the practice. On the surface, it appears there is no reason for having two searches if HINTS works in the way that it says.  This posting<br><br><a href="http://mail.kde.org/pipermail/kde-buildsystem/2008-June/004762.html">http://mail.kde.org/pipermail/kde-buildsystem/2008-June/004762.html</a><br><br></div><div class="gmail_extra">appears to indicate that HINTS was created for exactly the purpose I need:<br><br></div><div class="gmail_extra">HINTS ${SOMEPLACE_I_WANT_TO_LOOK_FIRST}<br><br></div><div class="gmail_extra">George<br></div></div>