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1. 

   JBernardo
   Member

   Hi there,

   Well, I do understand new and delete are not allowed to work on Wiring, but, malloc doesn't work either unlike Arduino.

   There's a problem when I include stdlib.h because of the following errors:
   

   /media/Dados/dev/.../include/stdlib.h:72: error: expected unqualified-id before 'int'
   /media/Dados/dev/.../include/stdlib.h:72: error: expected ')' before 'int'
   /media/Dados/dev/.../include/stdlib.h:72: error: expected ')' before 'int'
   /media/Dados/dev/.../include/stdlib.h:72: error: expected ')' before 'int'

   And those are lines 71 to 74 from stdlib.h:

   _VOID _EXFUN(abort,(_VOID) _ATTRIBUTE ((noreturn)));
   int _EXFUN(abs,(int));
   int _EXFUN(atexit,(_VOID (*__func)(_VOID)));
   double _EXFUN(atof,(const char *__nptr));

   This is not much meaningful...

   When I comment this line, some undefined reference errors appear on a pointer (the one I'm trying to allocate) to my object.

   I'm not sure what to do except to change the design of the program ...

   I also tried placement new but doesn't seems to work (including <new.h> doesn't change anything)

   Any thoughts?

   Posted 4 years ago #
2. 

   gbulmer
   Moderator

   I don't get any errors when I
   #include <stdlib.h>

   I haven't run it, but the code:
   

   char *p = (char*)malloc(10);

   compiles fine.

   I'd assume there is something else wrong.
   Try copying the file then cutting it down until the error becomes clearer.

   Posted 4 years ago #
3. 

   JBernardo
   Member

   Weird... the problem on stdlib.h stopped showing, but I keep having undefined reference to my object pointer.

   Somehow I can't find the file I was working on, but among other things, I had something like this:
   

   class Box{
   public:
     static Box& get();
   
   private:
     Box();
     static Box *instance;
   
   };
   
   Box::Box(){
     instance = 0;
   }
   
   Box& Box::get(){
     if (!instance){
       instance = (Box *) malloc(sizeof(Box));
     }
     return *instance;
   }

   Posted 4 years ago #
4. 

   mbolivar
   LeafLabs

   JBernardo,

   The abs() problem is a known issue which will get fixed; perhaps this thread may be useful to you in the meantime:

   http://forums.leaflabs.com/topic.php?id=663&replies=10#post-3755

   Posted 4 years ago #
5. 

   JBernardo
   Member

   I was probably including stdlib.h after other libraries...

   Anyway, accessing static variables from a class keep resulting in undefined references... The way I solved the problem was declaring instance inside Box::get() as static, of course.

   The program is now working happily.

   Thanks

   Posted 4 years ago #

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