Boost 1.70 unordered_set problem with Sun Solaris Studio 12.3

From: mik (mirko.cambi_at_[hidden])
Date: 2019-12-11 16:35:02

Hi again,

this time I've a problem to compile a simple program using an
unordered_set. The program is the following:

---
//main.cpp
#include <boost/config.hpp>
#include <boost/unordered_set.hpp>
#include <boost/functional/hash.hpp>
int main()
{
   boost::unordered::unordered_set<std::string> set;
   return 0;
}
---
I compile it with the command below:
CC main.cpp -o test -library=stlport4 -I/.../boost_1_70_0/
and I got the error:
ir_build_type(): unexpected type
Please help me!!
Thank you,
    Mirko