CURRENT: can't buildworld; /usr/bin/ld: error: cannot open crt1.o:

One of our CURRENT boxes is repeateadly disobeying to build "buildworld" (make
buildkernel seems to work as I did several kernels right now).

The hosts's world is as of Wednesday, 10th January, the kernel's revison is

FreeBSD 12.0-CURRENT #0 r327871: Fri Jan 12 12:18:19 CET 2018 amd64.

I did, as a test, Friday, 12th Jan, as you can see, the last kernel build.

The host in question also carries a variety of release, package an jail builds
in separate source trees (CURRENT in most cases, to keep them away from the
host's source tree). Those separate source trees also reject to build.

After performing a "make cleanworld" to startover (even this morning, when I
watched LLVM/CLANG 6.0.0 has slipped in), I face still the same error:

/usr/bin/ld: error: cannot open crt1.o: No such file or directory

More details see below.

The last installation of the system was performed with WITH_LLD_IS_LD and
WITH_BOOTSTRAP_LLD set, if this is of importance. I still have
WITH_LLD_IS_LD=YES set in /usr/src.conf.

An we use WITH_META_MODE, just for the record.

I have other machines which didn't get updated on Wednesday, 10th January and
they perform well and without problems (with the same settings in /etc/src.conf
and also WITH_META_MODE).

Can someone give me some hints? How to fix the problem?

Thanks ins advance,

Oliver

[...]
--------------------------------------------------------------
>>> stage 1.1: legacy release compatibility shims
--------------------------------------------------------------
cd /usr/src; INSTALL="sh /usr/src/tools/install.sh"
TOOLS_PREFIX=/usr/obj/usr/src/amd64.amd64/tmp
PATH=/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/sbin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/bin:/sbin:/bin:/usr/sbin:/usr/bin
WORLDTMP=/usr/obj/usr/src/amd64.amd64/tmp
MAKEFLAGS="-m /usr/src/tools/build/mk  -m /usr/src/share/mk" make  -f
Makefile.inc1  DESTDIR=  OBJTOP='/usr/obj/usr/src/amd64.amd64/tmp/obj-tools'
OBJROOT='${OBJTOP}/'  MAKEOBJDIRPREFIX=  BOOTSTRAPPING=1200055  BWPHASE=legacy
SSP_CFLAGS=  MK_HTML=no NO_LINT=yes MK_MAN=no  -DNO_PIC MK_PROFILE=no
-DNO_SHARED  -DNO_CPU_CFLAGS MK_WARNS=no MK_CTF=no  MK_CLANG_EXTRAS=no
MK_CLANG_FULL=no  MK_LLDB=no MK_TESTS=no  MK_LLD=yes  MK_INCLUDES=yes legacy
===> tools/build (obj,includes,all,install)
Building /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/tools/build/_libinstall

--------------------------------------------------------------
>>> stage 1.2: bootstrap tools
--------------------------------------------------------------
cd /usr/src; INSTALL="sh /usr/src/tools/install.sh"
TOOLS_PREFIX=/usr/obj/usr/src/amd64.amd64/tmp
PATH=/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/sbin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/bin:/sbin:/bin:/usr/sbin:/usr/bin
WORLDTMP=/usr/obj/usr/src/amd64.amd64/tmp
MAKEFLAGS="-m /usr/src/tools/build/mk  -m /usr/src/share/mk" make  -f
Makefile.inc1  DESTDIR=  OBJTOP='/usr/obj/usr/src/amd64.amd64/tmp/obj-tools'
OBJROOT='${OBJTOP}/'  MAKEOBJDIRPREFIX=  BOOTSTRAPPING=1200055
BWPHASE=bootstrap-tools  SSP_CFLAGS=  MK_HTML=no NO_LINT=yes MK_MAN=no
-DNO_PIC MK_PROFILE=no -DNO_SHARED  -DNO_CPU_CFLAGS MK_WARNS=no MK_CTF=no
MK_CLANG_EXTRAS=no MK_CLANG_FULL=no  MK_LLDB=no MK_TESTS=no  MK_LLD=yes
MK_INCLUDES=yes bootstrap-tools ===> lib/clang/libllvmminimal (obj,all,install)
Building /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvmminimal/Support/ConvertUTFWrapper.o
Building /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvmminimal/Support/Debug.o

[...]

Building /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen/X86RecognizableInstr.o
Building /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen/llvm-tblgen
/usr/bin/ld: error: cannot open crt1.o: No such file or directory
c++: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1

Stop.
make[3]: stopped in /usr/src/usr.bin/clang/llvm-tblgen
.ERROR_TARGET='llvm-tblgen'
.ERROR_META_FILE='/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen/llvm-tblgen.meta'
.MAKE.LEVEL='3'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
_ERROR_CMD='c++ -O2 -pipe -O3
-I/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvm
-I/usr/src/lib/clang/include -I/usr/src/contrib/llvm/include
-DLLVM_BUILD_GLOBAL_ISEL -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS
-DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd12.0\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd12.0\"
-DDEFAULT_SYSROOT=\"/usr/obj/usr/src/amd64.amd64/tmp\" -ffunction-sections
-fdata-sections -DNDEBUG -Qunused-arguments
-I/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/include -std=c++11
-fno-exceptions -fno-rtti -stdlib=libc++ -Wno-c++11-extensions
-Wl,--gc-sections -static -L/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/lib -o
llvm-tblgen  AsmMatcherEmitter.o AsmWriterEmitter.o AsmWriterInst.o
Attributes.o CTagsEmitter.o CallingConvEmitter.o CodeEmitterGen.o
CodeGenDAGPatterns.o CodeGenHwModes.o CodeGenInstruction.o CodeGenMapTable.o
CodeGenRegisters.o CodeGenSchedule.o CodeGenTarget.o DAGISelEmitter.o
DAGISelMatcher.o DAGISelMatcherEmitter.o DAGISelMatcherGen.o
DAGISelMatcherOpt.o DFAPacketizerEmitter.o DisassemblerEmitter.o
FastISelEmitter.o FixedLenDecoderEmitter.o GlobalISelEmitter.o InfoByHwMode.o
InstrDocsEmitter.o InstrInfoEmitter.o IntrinsicEmitter.o OptParserEmitter.o
PseudoLoweringEmitter.o RegisterBankEmitter.o RegisterInfoEmitter.o
SDNodeProperties.o SearchableTableEmitter.o SubtargetEmitter.o
SubtargetFeatureInfo.o TableGen.o Types.o X86DisassemblerTables.o
X86EVEX2VEXTablesEmitter.o X86FoldTablesEmitter.o X86ModRMFilters.o
X86RecognizableInstr.o /usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvmminimal/libllvmminimal.a
-L/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/ncurses/ncursesw -lncursesw
-L/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/libthr -lpthread
-legacy;' .CURDIR='/usr/src/usr.bin/clang/llvm-tblgen' .MAKE='make' .OBJDIR='/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen' .TARGETS='all'
DESTDIR='' LD_LIBRARY_PATH='' MACHINE='amd64' MACHINE_ARCH='amd64'
MAKEOBJDIRPREFIX='' MAKESYSPATH='/usr/src/share/mk' MAKE_VERSION='20171028'
PATH='/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/sbin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin:/usr/obj/usr/src/amd64.amd64/tmp/legacy/bin:/sbin:/bin:/usr/sbin:/usr/bin'
SRCTOP='/usr/src'
OBJTOP='/usr/obj/usr/src/amd64.amd64/tmp/obj-tools' .MAKE.MAKEFILES='/usr/src/share/mk/sys.mk /usr/src/share/mk/local.sys.env.mk /usr/src/share/mk/src.sys.env.mk /etc/src-env.conf /usr/src/share/mk/bsd.mkopt.mk /usr/src/share/mk/src.sys.obj.mk /usr/src/share/mk/auto.obj.mk /usr/src/share/mk/bsd.suffixes.mk /etc/make.conf /usr/local/etc/ports.conf /usr/src/share/mk/local.sys.mk /usr/src/share/mk/src.sys.mk /etc/src.conf /usr/src/usr.bin/clang/llvm-tblgen/Makefile /usr/src/usr.bin/clang/llvm.prog.mk /usr/src/lib/clang/llvm.pre.mk /usr/src/lib/clang/llvm.build.mk /usr/src/tools/build/mk/bsd.prog.mk /usr/src/share/mk/bsd.prog.mk /usr/src/share/mk/bsd.init.mk /usr/src/share/mk/bsd.opts.mk /usr/src/share/mk/bsd.cpu.mk /usr/src/share/mk/local.init.mk /usr/src/share/mk/src.init.mk /usr/src/usr.bin/clang/llvm-tblgen/../Makefile.inc /usr/src/share/mk/bsd.compiler.mk /usr/src/share/mk/bsd.linker.mk /usr/src/usr.bin/clang/llvm-tblgen/../../Makefile.inc /usr/src/share/mk/bsd.own.mk /usr/src/share
 /mk/bsd.libnames.mk /usr/src/share/mk/src.libnames.mk /usr/src/share/mk/src.opts.mk /usr/src/share/mk/bsd.nls.mk /usr/src/share/mk/bsd.confs.mk /usr/src/share/mk/bsd.files.mk /usr/src/share/mk/bsd.incs.mk /usr/src/share/mk/bsd.links.mk /usr/src/share/mk/bsd.dep.mk /usr/src/share/mk/bsd.clang-analyze.mk /usr/src/share/mk/bsd.obj.mk /usr/src/share/mk/bsd.subdir.mk /usr/src/share/mk/bsd.sys.mk /usr/src/tools/build/mk/Makefile.boot' .PATH='. /usr/src/usr.bin/clang/llvm-tblgen /usr/src/contrib/llvm/utils/TableGen'
*** Error code 1