trouble with long

[eles]

$cat test.cpp:

#include <iostream>

int main() {
	long long x = 1250000000 * 2;
	std::cout << x << std::endl;
	return 0;
}

g++-generated exe displays: -1794967296

$cat test.d:

import std.stdio;

int main() {
	long x = 1250000000 * 2;
	writefln("%d",x);
	return 0;
}

dmd- and gdc-generated exes display: -1794967296

compiling with g++ at least gives a warning:

warning: integer overflow in expression [-Woverflow]
long long x = 1250000000 * 2;

Both dmd and gdc do not complain in any way.

Isn't the promotion to int so awful? Better ideas? (yes, I know
about casting to long).