Mainline failed to boostrap on Linux/ia64

[H. J. Lu]

The last working one is on 2004-05-18. The current one failed with many
undefined reference:

...
/export/build/gnu/gcc/build-ia64-linux/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so:
undefined reference to `__gnu_cxx::stdio_sync_filebuf<wchar_t,
std::char_traits<wchar_t> >::xsputn(wchar_t const*, long)'
/export/build/gnu/gcc/build-ia64-linux/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so:
undefined reference to `std::basic_stringbuf<wchar_t,
std::char_traits<wchar_t>, std::allocator<wchar_t> >::~basic_stringbuf()'
/export/build/gnu/gcc/build-ia64-linux/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so:
undefined reference to `std::__codecvt_abstract_base<char, char,
__mbstate_t>::~__codecvt_abstract_base()'
collect2: ld returned 1 exit status
make[6]: *** [abi_check] Error 1



H.J.