Error upgrading 11-STABLE to 12-STABLE in ifunc resolver

[Thierry Thomas]

Hello,

Trying to upgrade a machine from

11.2-STABLE #0 r337833: Wed Aug 15 12:50:47 CEST 2018

to 12-STABLE as:

Working Copy Root Path: /usr/src
URL: https://svn.freebsd.org/base/stable/12
Relative URL: ^/stable/12
Repository Root: https://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 342558
Node Kind: directory
Schedule: normal
Last Changed Author: kp
Last Changed Rev: 342545
Last Changed Date: 2018-12-26 13:56:36 +0100 (Wed, 26 Dec 2018)

aborts due to this error:

/usr/local/libexec/ccache/world/cc -target x86_64-unknown-freebsd12.0 --sysroot=/usr/obj/usr/src/amd64.amd64/tmp -B/usr/obj/usr/src/amd64.amd64/tmp/usr/bin  -O2 -pipe   -DNO__SCCSID -DNO__RCSID -I/usr/src/lib/libc/include -I/usr/src/include -I/usr/src/lib/libc/amd64 -DNLS  -D__DBINTERFACE_PRIVATE -I/usr/src/contrib/gdtoa -I/usr/src/contrib/libc-vis -DINET6 -I/usr/obj/usr/src/amd64.amd64/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE -DPOSIX_MISTAKE -I/usr/src/lib/libmd -I/usr/src/contrib/jemalloc/include -I/usr/src/contrib/tzcode/stdtime -I/usr/src/lib/libc/stdtime -I/usr/src/lib/libc/locale -DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DWANT_HYPERV -DYP -DNS_CACHING -DSYMBOL_VERSIONING -g -MD  -MF.depend.amd64_set_fsbase.o -MTamd64_set_fsbase.o -std=gnu99 -fstack-protector-strong -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef -Wno-address-of-packed-member -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter  -Qunused-arguments  -I/usr/src/lib/libutil -I/usr/src/lib/msun/amd64 -I/usr/src/lib/msun/x86 -I/usr/src/lib/msun/src -c /usr/src/lib/libc/amd64/sys/amd64_set_fsbase.c -o amd64_set_fsbase.o
--- amd64_get_fsbase.o ---
/usr/src/lib/libc/amd64/sys/amd64_get_fsbase.c:60:1: error: ifunc resolver function must have no parameters
DEFINE_UIFUNC(, int, amd64_get_fsbase, (void **), static)
^
/usr/obj/usr/src/amd64.amd64/tmp/usr/include/x86/ifunc.h:43:44: note: expanded from macro 'DEFINE_UIFUNC'
    qual ret_type name args __attribute__((ifunc(#name "_resolver")));  \

cc is:
FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on LLVM 6.0.1)

This problem has already been reported in
<https://lists.freebsd.org/pipermail/freebsd-current/2018-November/071980.html>
and should be fixed with clang 7, but I'm surprised that it seems
impossible to upgrade from 11-STABLE to 12-STABLE; did I miss something?

Thanks.
-- 
Th. Thomas.
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