3737 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:23:26 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=760#post-4552 Tue, 10 May 2011 19:48:23 +0000 JBernardo 4552@http://forums.leaflabs.com/ <p>I was probably including <code>stdlib.h</code> after other libraries...</p> <p>Anyway, accessing static variables from a class keep resulting in undefined references... The way I solved the problem was declaring <code>instance</code> inside <code>Box::get()</code> as static, of course.</p> <p>The program is now working happily.</p> <p>Thanks </p> http://forums.leaflabs.com/topic.php?id=760#post-4535 Mon, 09 May 2011 14:15:58 +0000 mbolivar 4535@http://forums.leaflabs.com/ <p>JBernardo,</p> <p>The abs() problem is a known issue which will get fixed; perhaps this thread may be useful to you in the meantime:</p> <p><a href="http://forums.leaflabs.com/topic.php?id=663&amp;replies=10#post-3755" rel="nofollow">http://forums.leaflabs.com/topic.php?id=663&amp;replies=10#post-3755</a> </p> http://forums.leaflabs.com/topic.php?id=760#post-4526 Sun, 08 May 2011 21:20:05 +0000 JBernardo 4526@http://forums.leaflabs.com/ <p>Weird... the problem on <code>stdlib.h</code> stopped showing, but I keep having undefined reference to my object pointer.</p> <p>Somehow I can't find the file I was working on, but among other things, I had something like this:<br /> <pre><code>class Box{ public: static Box&amp; get(); private: Box(); static Box *instance; }; Box::Box(){ instance = 0; } Box&amp; Box::get(){ if (!instance){ instance = (Box *) malloc(sizeof(Box)); } return *instance; }</code></pre> http://forums.leaflabs.com/topic.php?id=760#post-4522 Sun, 08 May 2011 08:19:53 +0000 gbulmer 4522@http://forums.leaflabs.com/ <p>I don't get any errors when I<br /> <code>#include &lt;stdlib.h&gt;</code></p> <p>I haven't run it, but the code:<br /> <pre><code>char *p = (char*)malloc(10);</code></pre> <p>compiles fine. </p> <p>I'd assume there is something else wrong.<br /> Try copying the file then cutting it down until the error becomes clearer. </p> http://forums.leaflabs.com/topic.php?id=760#post-4520 Sun, 08 May 2011 00:44:42 +0000 JBernardo 4520@http://forums.leaflabs.com/ <p>Hi there,</p> <p>Well, I do understand <code>new</code> and <code>delete</code> are not allowed to work on Wiring, but, <code>malloc</code> doesn't work either unlike Arduino.</p> <p>There's a problem when I include <code>stdlib.h</code> because of the following errors:<br /> <pre><code>/media/Dados/dev/.../include/stdlib.h:72: error: expected unqualified-id before &#39;int&#39; /media/Dados/dev/.../include/stdlib.h:72: error: expected &#39;)&#39; before &#39;int&#39; /media/Dados/dev/.../include/stdlib.h:72: error: expected &#39;)&#39; before &#39;int&#39; /media/Dados/dev/.../include/stdlib.h:72: error: expected &#39;)&#39; before &#39;int&#39;</code></pre> <p>And those are lines 71 to 74 from <code>stdlib.h</code>:</p> <p>_VOID _EXFUN(abort,(_VOID) _ATTRIBUTE ((noreturn)));<br /> <strong>int _EXFUN(abs,(int));</strong><br /> int _EXFUN(atexit,(_VOID (*__func)(_VOID)));<br /> double _EXFUN(atof,(const char *__nptr));</p> <p>This is not much meaningful...</p> <p>When I comment this line, some undefined reference errors appear on a pointer (the one I'm trying to allocate) to my object.</p> <p>I'm not sure what to do except to change the design of the program ...</p> <p>I also tried <code>placement new</code> but doesn't seems to work (including <code>&lt;new.h&gt;</code> doesn't change anything)</p> <p>Any thoughts? </p>