While compiling a program that uses boost/cstdint.hpp from Boost Integer Library:

#include <iostream>
#include <boost/cstdint.hpp>
int main()
{
    boost::int64_t i64 = -2;
    boost::uint64_t ui64 = 2;
    boost::uint64_t d = ui64 - i64;
    std::cout << d << std::endl;
    return 0;
}

front-end of Comeau C/C++ 4.3.10.1 compiler complains:

boost/cstdint.hpp", line 111: error: the
          global scope has no "int64_t"
    using ::int64_t;
            ^

However, if I reorder include directives:

#include <boost/cstdint.hpp>
#include <iostream>

then the program compiles well.

I believe that the order of header files should not be relevant here, but seems it is. I’ve submitted a ticket #3548 to Boost.Integer and I’m curious awaiting the diagnosis.

After this issue is fixed, I’m looking forward building the Generic Geometry Library using Comeau C/C++ compiler. This should help us to maintain high quality of standard and yet more portable C++ code.