On Tue, 25 Sep 2018, rth7...@gmail.com wrote:

> From: Richard Henderson <richard.hender...@linaro.org>
> 
> We are about to introduce symbols to libgcc.a that will
> not be present in libgcc_s.so.  Most symbols will be
> resolved from the shared library first, and only the new
> symbols will be pulled from the static library.

Configurations with this property should be using libgcc's 
config/t-slibgcc-libgcc to make libgcc_s.so into a linker script.  Unless 
you have a configuration needing this but not supporting linker scripts, I 
wouldn't expect driver changes to be needed.

The linker script looks like:

/* GNU ld script
   Use the shared library, but some functions are only in
   the static library.  */
GROUP ( libgcc_s.so.1 -lgcc )

-- 
Joseph S. Myers
jos...@codesourcery.com

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