#undef HAVE_GETTEXT
#undef HAVE_STPCPY
-// Define if GCC supports weak symbols
+// Define if GCC supports weak symbols.
#undef _GLIBCPP_SUPPORTS_WEAK
-// Define if gthr-default.h exists (meaning that threading support is enabled)
+// Define if gthr-default.h exists (meaning that threading support is enabled).
#undef HAVE_GTHR_DEFAULT
-// Include support for 'long long' and 'unsigned long long'.
+// Include I/O support for 'long long' and 'unsigned long long'.
#undef _GLIBCPP_USE_LONG_LONG
-// Define if code specialized for wchar_t should be used.
+// Define if C99 features such as lldiv_t, llabs, lldiv should be exposed.
#undef _GLIBCPP_USE_C99
// Include support for 'long double'.