gcc @4.7.1 Fails compiling with -m32 on 64-bit system

[fh@…]

Hi,

gcc 4.7.1 fails to compile the following program with flag -m32 on 64-bit system.

#include <limits>
#include <iostream>
using namespace std;
int main()
{
        cout << numeric_limits<int>::has_infinity << endl;
        return 0;
}

The same problem has been discussed for Arch linux here: ​http://comments.gmane.org/gmane.comp.gcc.help/41605 If I understand well this is a problem of how gcc is built and packaged and not a problem of gcc itself.

The output of "g++-mp-4.7 -m32 -v foo.cc" shows that some path is not set properly (see attachment):

ignoring nonexistent directory "/opt/macports/lib/gcc47/gcc/x86_64-apple-darwin10/4.7.1/../../../../../x86_64-apple-darwin10/include"

I am running Mac OS 10.6.8 on an Intel Core 2 Duo. I have macports 2.1.2.

[ryandesign (Ryan Carsten Schmidt)]

Duplicate of #35609.