[Bug boehm-gc/18135] gctest (boehm-gc) uses the installed libgcc_s on darwin

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18135

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Posted more than three years ago:

> Andrew,
>     Do you still see this issue with current gcc trunk since...

Any reason to keep this PR open?