[Bug 226975] x11/eaglemode: fails to link with lld as the system linker

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226975

            Bug ID: 226975
           Summary: x11/eaglemode: fails to link with lld as the system
                    linker
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: amdmi3 at FreeBSD.org
          Reporter: emaste at freebsd.org
            Blocks: 214864
             Flags: maintainer-feedback?(amdmi3 at FreeBSD.org)
          Assignee: amdmi3 at FreeBSD.org

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]:
---
/usr/bin/ld: error: cannot preempt symbol: xine_check_version
>>> defined in /usr/local/lib/libxine.so
>>> referenced by emAvServerProc_xine.c
>>>               obj/emAvServerProc_xine.o:(main)

/usr/bin/ld: error: cannot preempt symbol: xine_new
>>> defined in /usr/local/lib/libxine.so
>>> referenced by emAvServerProc_xine.c
>>>               obj/emAvServerProc_xine.o:(main)
---

Known issues in this port or in lld that affect this port:
(3) Shared library protected symbol preemption.

reeBSD 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/eaglemode-0.93.1.log


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214864
[Bug 214864] [exp-run] test build with lld as /usr/bin/ld
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