On Tue, Mar 21, 2006 at 05:49:43PM -0800, Steve Langasek wrote: > Then you're obviously doing something wrong, but you haven't actually told > us what you're doing, which makes it difficult to help you debug it.
Well, as indicated earlier, I checked the binaries of the g++ driver versions for possible hardcoded hints to the location of the standard headers. There are also no id keywords in these executables. > Please show us the commands you're running to try to build/link these > programs, as well as the simplest C++ program for which you're seeing this > problem. The command that fails for finding the headers: g++ -Wall simple.c++ -o simple The one for dying at the linking stage (headers are located): g++ -V 3.4 -Wall simple.c++ -o simple where g++ is a link to g++-4.0. Please see the attachment for the code. I might make it even simpler but then I'd probably be the only one (again) to complain at the gcc dev team about mangled type names from templates returned by type_info.name() (which, as I recall, should be human readable types, ie as we write them in the sources) but that's just to trigger the inclusion of a standard header for an incomplete standard type that is built into the language. > > yet still g++-4.0 does not find them. What's the point in having a C++ > > compiler without it's headers on a system ? > > AFAIK, it's a perfectly valid use case to use g++ for compiling C++ code > which doesn't reference the standard C++ library. In rare cases (as in the development of standalone code) it certainly is. The same would be valid for plain ol' C, wouldn't it ? But then again, I haven't seen a single C compiler distribution without a standard library (shared object and headers) either as a prereq or directly included. I am sure the majority of Debian users rather hack on userland apps than microkernels written in C++. Regards, Christian
#include <iostream>
#include <typeinfo>
using namespace std;
template < typename T >
struct A {
struct B {
typedef typename T::b_type value_type;
B( value_type v ): value(v) {}
operator value_type () const { return value; }
value_type value;
};
typedef typename T::a_type value_type;
A( value_type v ): value(v) {}
operator value_type () const { return value; }
value_type value;
};
struct adp {
typedef double a_type;
typedef unsigned int b_type;
};
int main( int argc, char * argv[] )
{
A<adp> a(-.5457);
A<adp>::B b(8674);
cout << typeid(a).name() << "'s size: " << sizeof(a)
<< ", value: " << a << endl;
cout << typeid(b).name() << "'s size: " << sizeof(b)
<< ", value: " << b << endl;
return 0;
}
signature.asc
Description: Digital signature
