diff options
| -rw-r--r-- | lib/Headers/unwind.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Headers/unwind.h b/lib/Headers/unwind.h index a99c8a1176..a0659203b1 100644 --- a/lib/Headers/unwind.h +++ b/lib/Headers/unwind.h @@ -31,7 +31,19 @@ # define _SHOULD_UNDEFINE_GNU_SOURCE # define _GNU_SOURCE # endif -# include_next <unwind.h> +// libunwind's unwind.h reflects the current visibility. However, Mozilla +// builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the +// visibility to default and export its contents. gcc also allows users to +// override its override by #defining HIDE_EXPORTS (but note, this only obeys +// the user's -fvisibility setting; it doesn't hide any exports on its own). We +// imitate gcc's header here: +# ifdef HIDE_EXPORTS +# include_next <unwind.h> +# else +# pragma GCC visibility push(default) +# include_next <unwind.h> +# pragma GCC visibility pop +# endif # ifdef _SHOULD_UNDEFINE_GNU_SOURCE # undef _GNU_SOURCE # undef _SHOULD_UNDEFINE_GNU_SOURCE |