Date: Fri, 12 Jan 2018 10:26:59 -0500 From: Shawn Webb <shawn.webb@hardenedbsd.org> To: Dimitry Andric <dim@FreeBSD.org> Cc: freebsd-toolchain@freebsd.org Subject: Re: projects/clang600-import and ld.lld Message-ID: <20180112152659.rqkvhzny6hzczv3k@mutt-hbsd> In-Reply-To: <7D27872B-1FAF-4DCE-AD90-B8F9EB866C75@FreeBSD.org> References: <20180112143851.wzp373hapbsxyntu@mutt-hbsd> <7D27872B-1FAF-4DCE-AD90-B8F9EB866C75@FreeBSD.org>
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--5reuvyv7mw6kigem Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jan 12, 2018 at 04:17:50PM +0100, Dimitry Andric wrote: > On 12 Jan 2018, at 15:38, Shawn Webb <shawn.webb@hardenedbsd.org> wrote: > >=20 > > I know it's early in the game, but I thought I'd report this anyways. > > I have lld as the default linker (MK_LLD_IS_LD=3Dyes). When lld tries to > > link usr.bin/clang/llvm-extract/llvm-extract, lld errors out with some > > unresolved symbols. The log is below. > >=20 > > Has anyone else run into this? > >=20 > > /usr/obj/scratch/hbsd-playground/amd64.amd64/tmp/usr/bin/ld: error: und= efined symbol: compressBound > >>>> referenced by Compression.cpp:63 (/scratch/hbsd-playground/contrib/l= lvm/lib/Support/Compression.cpp:63) > >>>> Compression.o:(llvm::zlib::compress(llvm::StringRef, ll= vm::SmallVectorImpl<char>&, llvm::zlib::CompressionLevel)) in archive /usr/= obj/scratch/hbsd-playground/amd64.amd64 > > /lib/clang/libllvm/libllvm.a >=20 > It links fine for me, and I haven't heard any other reports of this, but > can you please try adding a line: >=20 > LIBADD+=3D z Can do. I'm also using llvm-ar as the default ar and ranlib, llvm-nm as the default nm, and llvm-objdump as the default objdump. It might be the combination (I kinda suspect llvm-ar) that could be the issue. It's possible there's a regression in llvm-ar. >=20 > to usr.bin/clang/llvm-extract/Makefile locally, and see if that fixes it > for you? I'll give that a shot, but it seems the error is within lld itself. >=20 > At some point I've tried minimizing the number of libraries pulled in, > and on my systems llvm-extract didn't use any of the compression > functions. If you compile it differently, it could end up pulling in > those functions anyway. >=20 > Do you have any non-default settings in make.conf or src.conf? Nope. This is HardenedBSD's source tree, though, so we do have several different WITH_* flags. I'm working on pulling in the retpoline patch into a feature branch in the HardenedBSD Playground repo[1]. >=20 > -Dimitry >=20 > P.S. The clang600-import branch should be mostly ready for general > consumption, except for a number of ports that are still problematic, > see https://bugs.freebsd.org/224669 >=20 Great to hear! [1]: https://github.com/hardenedbsd/hardenedbsd-playground/tree/hardened/cu= rrent/retpoline Thanks for the help. I'll do more investigating and report back. In the meantime, if you have any further ideas, please let me know. Thanks again, --=20 Shawn Webb Cofounder and Security Engineer HardenedBSD Tor-ified Signal: +1 443-546-8752 GPG Key ID: 0x6A84658F52456EEE GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE --5reuvyv7mw6kigem Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEKrq2ve9q9Ia+iT2eaoRlj1JFbu4FAlpY08EACgkQaoRlj1JF bu7XwxAAvoFpROHxhjS0GKkAY0cvyrQP+kme0C2Kq1FjmcN14pZ02QJR+fWvc7vt 7opyfkJ7eS9KsCJQoCeO8iYsYky70l2rrQGOyUArMQ2+nc+hVuuQDKjtUGQ2lm0/ uedrbx565738dacHPyLjBVT11sjgJExjCAhrUDKk93ZHQvlg99JsdLtrooOyoitq oajaQOBNT3VzggAYI04n0PfIziVmDHu+GEJjWYVccVQ8FWuDPRB7lYtrguAXxp1F ZN4qhdIDUCVgvqpkVcLFszOZB9LLuMSKHSKEERODsQbO8pltYupX011dbSfkf+Bt j1fG7eq2KYlDv2dXwg6QeQ3BbqgnGK/sgvIUMh8lpDbXsfp5JGqzTwFLME7rLR80 1C1nlE4UvGyRNJAQ7u90GdkwaAPAQomF9GAnEy2I8/sfa4oulqLnpXFPP5JCYP0S uDZvqSPo6mPIPRgg6QSc1l95dccH86KTIAF56zh1OIhecSGyqllGfis9edNW51R2 /2qU4BUx9lmW+WbJnys/Igjiq0Y7M2XCL8FXdi1Q16Rm2JDu5FW0fAP9sNHRmcKd kNte3YbnovbJyCgMDYxc7lHab0PWdCal7lSUfEAR8Ch01BtsSLet3cia5ykc8xgp aFksDWyJfn1RI7DeaXiiZ8SUnshgnmsuEGNV4hzogKTBSpcrjic= =8+ei -----END PGP SIGNATURE----- --5reuvyv7mw6kigem--
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