https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114233
--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Francois-Xavier Coudert from comment #3)
> Jakub has posted a patch in the linker PR (thanks!).
>
> But there remains a darwin bug. The test in check_effective_target_shared
> actually works with C, but not with C++, because:
>
> diff --git a/gcc/testsuite/lib/target-supports.exp
> b/gcc/testsuite/lib/target-supports.exp
> index ae33c4f1e3a..467b539b20d 100644
> --- a/gcc/testsuite/lib/target-supports.exp
> +++ b/gcc/testsuite/lib/target-supports.exp
> @@ -1390,7 +1390,7 @@ proc check_effective_target_shared { } {
> # here to be undefined.
> set extra_flags ""
> if { [istarget *-*-darwin\[912\]*] } {
> - set extra_flags "-Wl,-U,_foo,-U,_bar"
> + set extra_flags "-Wl,-U,_foo,-U,_bar,-U,__Z3foov"
> }
Ah that's an omission on my part, the fix applied recently was incomplete :-(.
(FWIW, the "C" fix doubled the number of libphobos tests, IIRC).
