::wcstold has not been declared.

I'm getting more than 50 errors relating to standard headers, so something's REALLY messed up.

Code:

/usr/include/c++/4.5/cwchar|249|error: ‘::wcstold’ has not been declared|
/usr/include/c++/4.5/cwchar|266|error: ‘__gnu_cxx::wcstold’ has not been declared|
/usr/include/c++/4.5/tr1_impl/cwchar|50|error: ‘std::wcstold’ has not been declared|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|52|error: ‘uselocale’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|52|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|59|error: ‘__locale_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|66|error: ‘__c_locale’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h||In function ‘int std::__convert_from_v(const int&, char*, int, const char*, ...)’:|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|72|error: ‘__c_locale’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|72|error: expected ‘;’ before ‘__old’|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|97|error: ‘__old’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/c++locale.h|97|error: ‘__gnu_cxx::__uselocale’ cannot be used as a function|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|44|error: ‘pthread_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|45|error: ‘pthread_key_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|46|error: ‘pthread_once_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|47|error: ‘pthread_mutex_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|48|error: ‘pthread_mutex_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|49|error: ‘pthread_cond_t’ does not name a type|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|118|error: ‘pthread_once’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|118|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|119|error: ‘pthread_getspecific’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|119|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|120|error: ‘pthread_setspecific’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|120|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|122|error: ‘pthread_create’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|122|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|123|error: ‘pthread_join’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|123|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|124|error: ‘pthread_equal’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|124|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|125|error: ‘pthread_self’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|125|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|126|error: ‘pthread_detach’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|126|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|127|error: ‘pthread_cancel’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|127|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|128|error: ‘sched_yield’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|128|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|130|error: ‘pthread_mutex_lock’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|130|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|131|error: ‘pthread_mutex_trylock’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|131|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|137|error: ‘pthread_mutex_unlock’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|137|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|138|error: ‘pthread_mutex_init’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|138|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|139|error: ‘pthread_mutex_destroy’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|139|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|141|error: ‘pthread_cond_broadcast’ was not declared in this scope|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|141|error: invalid type in declaration before ‘;’ token|
/usr/include/c++/4.5/i686-linux-gnu/bits/gthr-default.h|142|error: ‘pthread_cond_signal’ was not declared in this scope|
||More errors follow but not being shown.|
||Edit the max errors limit in compiler options...|
||=== Build finished: 50 errors, 0 warnings ===|

Here's my code, but I really don't think it's the source of the problem.

Code:

#include <gmpxx.h>

#include <fstream>
#include <iostream>
#include <set>
#include <vector>

using namespace std;

ostream &out = cout;

set<mpz_class> progression;

int main()
{
    mpz_class t = 1;
    int max_length = 3;
    int progression_length = 100;

    cout << "Progression Length: ";
    cin >> progression_length;

    cout << "Max Subsequence Length: ";
    cin >> max_length;

    // out << "Progression: ";

    for(int i = 1;i < progression_length;t += (i++))
    {
        progression.insert(t);
        // out << t << " ";
    }

    out << endl << "Subsequences: " << endl;

    for(int length = 2;length <= max_length;length++)
    {
        set<mpz_class> sub_seq;

        for(int d = 1;d <= 10;d++)
        {
            for(auto i = progression.begin();i != progression.end();i++)
            {
                mpz_class next = *i + d;

                sub_seq.insert(*i);

                for(auto j = i;j != progression.end();j++)
                    if(*j > next)
                        break;
                    else if(*j == next)
                    {
                        next += d;
                        sub_seq.insert(*j);
                    }

                if(sub_seq.size() < length)
                    sub_seq.clear();
                else if(sub_seq.size() == length)
                    break;
            }

            if(sub_seq.size() < length)
                sub_seq.clear();
            else
                break;
        }

        if(sub_seq.size() == length)
        {
            out << "Subsequence of length " << length << ": ";

            for(auto i = sub_seq.begin();i != sub_seq.end();i++)
                out << *i << " ";

            out << endl;
        }
        else
            out << "No subsequence of length " << length << " could be found." << endl;
    }

    return 0;
}

I'm compiling with GCC, using C++0x.

Looks like you need to #include <wchar.h>

wcstold(3) - Linux man page

Okay. I tried that, and the errors are the same.

Something does appear to be very very odd here. If you start with just hello world and start adding things, what causes bad things?

Wild guess from a C programmer working on learning C++.

Try moving "#include <gmpxx.h>" after the standard C++ includes.

Tim S.

Something is very, very wrong.

Code:

#include <iostream>

int main() {return 0;}

Gives exactly the same errors.

It does the same with fstream, so I'm guessing there's a really messed up header related to streams.

BTW, I'm using the standard GCC compiler from the Kubuntu repositories. It's version 4.5.

I'm going to reinstall the packages and see if it helps.