具有可配置功能集的libstdc将是可以接受的.

我使用的命令是

g++ -nodefaultlibs -fno-rtti -fno-exceptions -lc

没有libstdc,我得到：

undefined reference to `operator delete(void*)'  
undefined reference to `operator new(unsigned int)'  
undefined reference to `vtable for __cxxabiv1::__class_type_info'  
undefined reference to `vtable for __cxxabiv1::__si_class_type_info'  
undefined reference to `__cxa_pure_virtual'

这些不是在libc中,还有一个很轻的libstdc只能实现这些东西？

我想要这样构建的测试代码目前看起来像这样：

#include <stdio.h>

template <class T>
class X
{
    public:
    T a;
};

class A1
{
    public:
        virtual void f() = 0;
        virtual ~A1() {}
};

class A2 : public A1
{
    public:
        virtual void f() {};
        virtual ~A2() {}
};

class Y
{
    public:
        ~Y() {}
};

int main()
{
    X<int> A;
    X<float> B;
    Y *C = new Y;

    A.a = 12;
    B.a = 2.3;

    printf("A: %d; B: %f\n",A.a,B.a);

    A2 *a2 = new A2;
    a2->f();

    return 0;
}