Date: Tue, 4 Oct 2022 09:33:11 -0700 From: John Baldwin <jhb@FreeBSD.org> To: Ravi Pokala <rpokala@freebsd.org>, src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: 5e4854cbf8d8 - main - rescue: Link libzutil after libzfs. Message-ID: <a0b5ba32-aae4-3f0f-e2a1-ad941752c2a7@FreeBSD.org> In-Reply-To: <1BB1F50E-C679-4570-8C7C-582B8C83CAD6@panasas.com> References: <202210032311.293NBKEd065568@gitrepo.freebsd.org> <1BB1F50E-C679-4570-8C7C-582B8C83CAD6@panasas.com>
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On 10/3/22 8:03 PM, Ravi Pokala wrote: > -----Original Message----- > From: <owner-src-committers@freebsd.org> on behalf of John Baldwin <jhb@FreeBSD.org> > Date: 2022-10-03, Monday at 16:11 > To: <src-committers@FreeBSD.org>, <dev-commits-src-all@FreeBSD.org>, <dev-commits-src-main@FreeBSD.org> > Subject: git: 5e4854cbf8d8 - main - rescue: Link libzutil after libzfs. > > The branch main has been updated by jhb: > > URL: https://cgit.FreeBSD.org/src/commit/?id=5e4854cbf8d8a9b056472967d15e1021d36fcae1 > > commit 5e4854cbf8d8a9b056472967d15e1021d36fcae1 > Author: John Baldwin <jhb@FreeBSD.org> > AuthorDate: 2022-10-03 23:10:42 +0000 > Commit: John Baldwin <jhb@FreeBSD.org> > CommitDate: 2022-10-03 23:10:42 +0000 > > rescue: Link libzutil after libzfs. > > libzfs depends on symbols defined in libzutil. For static linking > ld.bfd is less forgiving than lld, so rescue was failing to link when > using ld.bfd due to unresolved symbols from libzutil used by libzfs. > > You're solving an issue of unresolved symbols by putting the library where they're defined *after* the library where they're used? > > -Ravi (rpokala@) Yes, that's normally how that works (you link libc last, not first). lld is just a bit different as it will look in earlier libraries to resolve symbols (backwards references) not just forward references. ld.bfd only does forward references by default. -- John Baldwin
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