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PO"Warning: Can't find linker symbol for virtual table for value XXX value" using GCC and GDB (CodeBlocks)
 

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  1. PO"Warning: Can't find linker symbol for virtual table for value XXX value" using GCC and GDB (CodeBlocks)
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    <p>I'm getting a runtime error ("memory can't be written") that, after inspection through the debugger, leads to the warning in the tittle. </p> <p>The headers are the following:</p> <p>componente.h:</p> <pre><code>#ifndef COMPONENTE_H #define COMPONENTE_H using namespace std; class componente { int num_piezas; int codigo; char* proovedor; public: componente(); componente(int a, int b, const char* c); virtual ~componente(); virtual void print(); }; #endif // COMPONENTE_H </code></pre> <p>complement.h implementation </p> <pre><code>#include "Componente.h" #include &lt;string.h&gt; #include &lt;iostream&gt; componente::componente() { num_piezas = 0; codigo = 0; strcpy(proovedor, ""); //ctor } componente::componente(int a = 0, int b = 0, const char* c = "") { num_piezas = a; codigo = b; strcpy(proovedor, ""); } componente::~componente() { delete proovedor;//dtor } void componente::print() { cout &lt;&lt; "Proovedor: " &lt;&lt; proovedor &lt;&lt; endl; cout &lt;&lt; "Piezas: " &lt;&lt; num_piezas &lt;&lt; endl; cout &lt;&lt; "Codigo: " &lt;&lt; codigo &lt;&lt; endl; } </code></pre> <p>teclado.h</p> <pre><code>#ifndef TECLADO_H #define TECLADO_H #include "Componente.h" class teclado : public componente { int teclas; public: teclado(); teclado(int a, int b, int c, char* d); virtual ~teclado(); void print(); }; #endif // TECLADO_H </code></pre> <p>teclado.h implementation</p> <pre><code>#include "teclado.h" #include &lt;iostream&gt; teclado::teclado() : componente() { teclas = 0;//ctor } teclado::~teclado() { teclas = 0;//dtor } teclado::teclado(int a = 0, int b = 0, int c = 0, char* d = "") : componente(a,b,d) { teclas = c; } void teclado::print() { cout &lt;&lt; "Teclas: " &lt;&lt; teclas &lt;&lt; endl; } </code></pre> <p>The main method where I get the runtime error is the following:</p> <pre><code>#include &lt;iostream&gt; #include "teclado.h" using namespace std; int main() { componente a; // here I have the breakpoint where I check this warning a.print(); return 0; } </code></pre> <p>BUT, if instead of creating an "componente" object, I create a "teclado" object, I don't get the runtime error. I STILL get the warning during debugging, but the program behaves as expected:</p> <pre><code>#include &lt;iostream&gt; #include "teclado.h" using namespace std; int main() { teclado a; a.print(); return 0; } </code></pre> <p>This returns "Teclas = 0" plus the "Press any key..." thing. </p> <p>Do you have any idea why the linker is having troube with this? It doesn't show up when I invoke the virtual function, but before, during construction.</p>
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      1. PO"Warning: Can't find linker symbol for virtual table for value XXX value" using GCC and GDB (CodeBlocks)
      1. This table or related slice is empty.
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      1. PO"Warning: Can't find linker symbol for virtual table for value XXX value" using GCC and GDB (CodeBlocks)
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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