Since Mach-O has a two-level namespace (unlike ELF), we can usually set
this property to true.
(I believe this setting is only available in the new LTO backend, so I
can't really use ld64 / libLTO's behavior as a reference here... I'm
just doing what I think is correct.)
See {D119294} for the work done to calculate the `interposable` used in
this diff.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D119506
By unsetting this property, we are now able to internalize more symbols
during LTO. I compared the output of `-save-temps` for both LLD and
ld64, and we now match ld64's behavior as far as `lto-internalize.ll` is
concerned.
(Thanks @smeenai for working on an initial version of this diff!)
Fixes https://github.com/llvm/llvm-project/issues/50574.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D119372
D101513 means that we no longer need to specify `-pie` in most of our
test RUN commands. Let's clean up the unused flags so as not to confuse
future test writers.
Reviewed By: #lld-macho, oontvoo, MaskRay
Differential Revision: https://reviews.llvm.org/D113114
lld currently only references dyld_stub_binder when it's needed.
ld64 always references it when libSystem is linked.
Match ld64.
The (somewhat lame) motivation is that `nm` on a binary without any
export writes a "no symbols" warning to stderr, and this change makes
it so that every binary in practice has at least a reference to
dyld_stub_binder, which suppresses that.
Every "real" output file will reference dyld_stub_binder, so most
of the time this shouldn't make much of a difference. And if you
really don't want to have this reference for whatever reason, you
can stop passing -lSystem, like you have to for ld64 anyways.
(After linking any dylib, we dump the exported list of symbols to
a txt file with `nm` and only relink downstream deps if that txt
file changes. A nicer fix is to make lld optionally write .tbd files
with the public interface of a linked dylib and use that instead,
but for now the txt files are what we do.)
Differential Revision: https://reviews.llvm.org/D105782
Jez Ng