[cfe-dev] [libcxxabi]: undefined reference to 'typeinfo for void'

[Howard Hinnant]

On Aug 21, 2012, at 9:30 PM, soaliap <soaliap at 126.com> wrote:

> I build libcxx and libcxxabi with my complier on linux, but when I linked a
> simple hello world program, it reported a error:
> ---------------------------------------------------
> libc++abi.so: undefined reference to 'typeinfo for void'
> ---------------------------------------------------
> I know "undefined reference" error occured when some symbols were not found,
> but 'typeinfo for void' seemed so odd!
> Anybody gives me some advice? Thanks!

I don't know what the problem is.  But here is more info:

The file libcxxabi/src/private_typeinfo.cpp contains this:

// __fundamental_type_info

// This miraculously (compiler magic) emits the type_info's for:
//   1. all of the fundamental types
//   2. pointers to all of the fundamental types
//   3. pointers to all of the const fundamental types
__fundamental_type_info::~__fundamental_type_info()
{
}

void is a fundamental type.  This is where 'typeinfo for void' should be defined.

Howard