PATCH: PR libstdc++/25797: [4.2 Regression] almost all libstdc++ tests fail

[Paolo Carlini]

H. J. Lu wrote:

>We need to check linker warnings to make sure that --gc-sections is
>really supported. I have tested this patch on Linux/ia64 and
>Linux/ia32.
>
... note that, anyway, this is only *half* of the problem and would not
close 25797.

Paolo.