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List:       pykde
Subject:    Re: [PyQt] Workaround / fix for "could not create shader" issue with QtQuick on linux (causes all Qt
From:       Russell Warren <russ () perspexis ! com>
Date:       2014-01-28 18:39:54
Message-ID: CAD91c17Tgn41COgGtMrQWc-VpHg9yQ1TmVXMO3H0wtJUx7-EXQ () mail ! gmail ! com
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[Attachment #2 (multipart/alternative)]


>
> Given the C++ version does load libdbus (not necessarily linked against
> it) is it possible to find out where the dependency happens?


The dependency is the very first system call made inside app.exec().  I
can't go any deeper at the moment.

I added some bogus file access attempts as markers and ran an strace.  The
relevant code marker:

    fp = fopen("/bogus9", "rb");
    return app.exec();

The relevant (unfiltered) strace output which shows the very first access
to libdbus:

open("/bogus9", O_RDONLY)               = -1 ENOENT (No such file or
directory)
open("/home/russ/Qt/5.2.0/gcc_64/lib/libdbus-1.so.3", O_RDONLY) = -1 ENOENT
(No such file or directory)

Russ


>

[Attachment #5 (text/html)]

<div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px \
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Given \
the C++ version does load libdbus (not necessarily linked against it) is it possible \
to find out where the dependency happens?</blockquote>

<div><br></div><div>The dependency is the very first system call made inside \
app.exec().  I can&#39;t go any deeper at the moment.</div><div><br></div><div><div>I \
added some bogus file access attempts as markers and ran an strace.  The relevant \
code marker:</div>

<div><br></div><div><div><font face="courier new, monospace">    fp = \
fopen(&quot;/bogus9&quot;, &quot;rb&quot;);</font></div><div><font face="courier new, \
monospace">    return app.exec();</font></div></div><div><br></div>

</div><div>The relevant (unfiltered) strace output which shows the very first access \
to libdbus:<br></div><div><br></div><div><div><div>open(&quot;/bogus9&quot;, \
O_RDONLY)               = -1 ENOENT (No such file or directory)</div>

<div>open(&quot;/home/russ/Qt/5.2.0/gcc_64/lib/libdbus-1.so.3&quot;, O_RDONLY) = -1 \
ENOENT (No such file or \
directory)</div></div><div><br></div></div><div>Russ</div><div><br></div><div \
class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px \
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">


<br>
</blockquote></div>
</div>



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