PSI_DECL(int unsetenv, [(char *var)])
PSI_DECL(size_t wcstombs, [(char *dest, wchar_t *src, size_t n)])
PSI_DECL(int wctomb, [(char *s, wchar_t wc)])
PSI_DECL(int unsetenv, [(char *var)])
PSI_DECL(size_t wcstombs, [(char *dest, wchar_t *src, size_t n)])
PSI_DECL(int wctomb, [(char *s, wchar_t wc)])