Bug 226976

Summary:	math/rexx-regmath: fails to link with lld as system linker
Product:	Ports & Packages	Reporter:	Ed Maste <emaste>
Component:	Individual Port(s)	Assignee:	Kirill Ponomarev <krion>
Status:	Closed FIXED
Severity:	Affects Only Me	CC:	bob
Priority:	---	Flags:	bugzilla: maintainer-feedback? (bob)
Version:	Latest
Hardware:	Any
OS:	Any
Bug Depends on:
Bug Blocks:	214864

Description Ed Maste freebsd_committer

2018-03-27 13:30:26 UTC

I'm working on switching to LLVM's lld linker as the FreeBSD system linker (/usr/bin/ld)[1], and the port in this PR is reported as a new failure in the exp-run, PR 214864.

An excerpt from the build log[2]:
---
cc  -O2 -pipe  -Wno-incompatible-pointer-types -fstack-protector -fno-strict-aliasing  -g -pipe -fpic -I $HOME/regina -pipe -I/usr/local/include -Wno-incompatible-pointer-types -c rexxmath.c -o rexxmath.o
ld -Bdynamic -Bshareable  rexxmath.o -lm -o librexxmath.so
ld: error: unable to find library -lm
---
Known issues in this port or in lld that affect this port:

(2) lld has no built-in search paths (/lib, /usr/lib). Normally the linker is invoked from the compiler driver, and the search paths are added by the compiler. If lld is invoked directly library search paths must be specified explicitly, with -L/lib -L/usr/lib.

FreeBSD 11 and later have lld available as /usr/bin/ld.lld, so one simple option for testing is to just symlink /usr/bin/ld to ld.lld (and restore it to ld.bfd).

A port Makefile knob, LLD_UNSAFE=yes, exists to indicate that a port does not work with lld, and requires either /usr/bin/ld.bfd or binutils from ports. This should work for the common case of ports written in C using GNU autoconf; it may have no effect on other ports.

[1] https://lists.freebsd.org/pipermail/freebsd-current/2018-March/068985.html
[2] http://package18.nyi.freebsd.org/data/headamd64PR214864-default/2018-03-21_17h43m11s/logs/errors/rexx-regmath-1.00.log

Comment 1 Ed Maste freebsd_committer

2018-03-27 21:08:49 UTC

Via tobik@ in ports r465725, BINARY_ALIAS=ld=ld.bfd may be an effective workaround if LLD_UNSAFE does not work.

Comment 2 Ed Maste freebsd_committer

2018-03-28 01:05:59 UTC

Followup, if BINARY_ALIAS is used it should be in addition to LLD_UNSAFE, so that architectures without a /usr/bin/ld.bfd (arm64) work. If possible LLD_UNSAFE=yes should imply BINARY_ALIAS=ld=ld.bfd, under discussion on the ports mailing list.

Comment 3 commit-hook freebsd_committer

2018-03-31 18:11:36 UTC

A commit references this bug:

Author: krion
Date: Sat Mar 31 18:10:33 UTC 2018
New revision: 466071
URL: https://svnweb.freebsd.org/changeset/ports/466071

Log:
  Switch to ld.bfd by default as ld.ldd doesn't have built-in default
  output target.

  PR:		226976
  Submitted by:	emaste
  Approved by:	portmgr (LLD_UNSAFE blanket)

Changes:
  head/math/rexx-regmath/Makefile

Comment 4 Kubilay Kocak freebsd_committer

2018-04-01 08:56:59 UTC

Assign to committer that resolved.