[llvm-bugs] [Bug 34164] New: lld: please support -zmuldefs

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34164

            Bug ID: 34164
           Summary: lld: please support -zmuldefs
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: emaste at freebsd.org
                CC: llvm-bugs at lists.llvm.org
            Blocks: 23214

>From the GNU ld manpage:

       --allow-multiple-definition
       -z muldefs
           Normally when a symbol is defined multiple times, the linker will
           report a fatal error. These options allow multiple definitions and
           the first definition will be used.

This gets used by FreeBSD's arm LINT kernel, which is not intended to actually
boot but enables all kernel options/devices and is used as a source file
coverage tool.

E.g.:

ld: error: duplicate symbol: cpu_initclocks
>>> defined at /usr/home/emaste/src/freebsd-wip/sys/arm/arm/machdep.c
>>>            machdep.o:(cpu_initclocks)
>>> defined at /usr/home/emaste/src/freebsd-wip/sys/arm/at91/at91_machdep.c
>>>            at91_machdep.o:(.text+0x3B0)


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=23214
[Bug 23214] [META] Using LLD as FreeBSD's system linker
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