#include <locale.h>
#include <type_traits>
#ifndef LC_ALL
#error LC_ALL not defined
#endif
#ifndef LC_COLLATE
#error LC_COLLATE not defined
#endif
#ifndef LC_CTYPE
#error LC_CTYPE not defined
#endif
#ifndef LC_MONETARY
#error LC_MONETARY not defined
#endif
#ifndef LC_NUMERIC
#error LC_NUMERIC not defined
#endif
#ifndef LC_TIME
#error LC_TIME not defined
#endif
#ifndef NULL
#error NULL not defined
#endif
int main()
{
lconv lc;
static_assert((std::is_same<__typeof__(setlocale(0, "")), char*>::value), "");
static_assert((std::is_same<__typeof__(localeconv()), lconv*>::value), "");
}