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Date:      Sat, 23 Dec 2017 20:56:33 +1100
From:      Peter Jeremy <peter@rulingia.com>
To:        freebsd-current@FreeBSD.org
Subject:   Unable to build 12-current/amd64
Message-ID:  <20171223095633.GA52398@server.rulingia.com>

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Since r326496, buildworld on my 12-current/amd64 system has consistently
died as follows.  I have no problems building on i386 or building
12-current/amd64 on 11-stable.

=2E..
>>> stage 3: cross tools
--------------------------------------------------------------
cd /usr/src; INSTALL=3D"sh /usr/src/tools/install.sh"  TOOLS_PREFIX=3D/usr/=
obj/usr/src/amd64.amd64/tmp  PATH=3D/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=3D/usr/o=
bj/usr/src/amd64.amd64/tmp  MAKEFLAGS=3D"-m /usr/src/tools/build/mk  -m /us=
r/src/share/mk" make  -f Makefile.inc1  DESTDIR=3D  OBJTOP=3D'/usr/obj/usr/=
src/amd64.amd64/tmp/obj-tools'  OBJROOT=3D'${OBJTOP}/'  MAKEOBJDIRPREFIX=3D=
  BOOTSTRAPPING=3D1200054  BWPHASE=3Dcross-tools  SSP_CFLAGS=3D  MK_HTML=3D=
no NO_LINT=3Dyes MK_MAN=3Dno  -DNO_PIC MK_PROFILE=3Dno -DNO_SHARED  -DNO_CP=
U_CFLAGS MK_WARNS=3Dno MK_CTF=3Dno  MK_CLANG_EXTRAS=3Dno MK_CLANG_FULL=3Dno=
  MK_LLDB=3Dno MK_TESTS=3Dno  MK_INCLUDES=3Dyes  TARGET=3Damd64 TARGET_ARCH=
=3Damd64  MK_GDB=3Dno MK_LLD_IS_LD=3Dno MK_TESTS=3Dno cross-tools
=2E..
=3D=3D=3D> lib/clang/libclang (all)
=2E..
c++  -O2 -pipe -I/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libcl=
ang -I/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvm -I/usr/s=
rc/contrib/llvm/tools/clang/lib/Driver -I/usr/src/contrib/llvm/tools/clang/=
include -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_DE=
FAULT_TARGET_TRIPLE=3D\"x86_64-unknown-freebsd12.0\" -DLLVM_HOST_TRIPLE=3D\=
"x86_64-unknown-freebsd12.0\" -DDEFAULT_SYSROOT=3D\"/usr/obj/usr/src/amd64.=
amd64/tmp\" -ffunction-sections -fdata-sections -gline-tables-only -MD -MF.=
depend.Basic_SourceLocation.o -MTBasic/SourceLocation.o -Qunused-arguments =
-I/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/include  -std=3Dc++11 -fno-ex=
ceptions -fno-rtti -gline-tables-only -stdlib=3Dlibc++ -Wno-c++11-extension=
s  -c /usr/src/contrib/llvm/tools/clang/lib/Basic/SourceLocation.cpp -o Bas=
ic/SourceLocation.o
c++  -O2 -pipe -I/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libcl=
ang -I/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/lib/clang/libllvm -I/usr/s=
rc/contrib/llvm/tools/clang/lib/Driver -I/usr/src/contrib/llvm/tools/clang/=
include -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_DE=
FAULT_TARGET_TRIPLE=3D\"x86_64-unknown-freebsd12.0\" -DLLVM_HOST_TRIPLE=3D\=
"x86_64-unknown-freebsd12.0\" -DDEFAULT_SYSROOT=3D\"/usr/obj/usr/src/amd64.=
amd64/tmp\" -ffunction-sections -fdata-sections -gline-tables-only -MD -MF.=
depend.Basic_SourceManager.o -MTBasic/SourceManager.o -Qunused-arguments -I=
/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/include  -std=3Dc++11 -fno-exce=
ptions -fno-rtti -gline-tables-only -stdlib=3Dlibc++ -Wno-c++11-extensions =
 -c /usr/src/contrib/llvm/tools/clang/lib/Basic/SourceManager.cpp -o Basic/=
SourceManager.o
/usr/src/contrib/llvm/tools/clang/lib/Basic/SourceManager.cpp:1166:10: fata=
l error: 'emmintrin.h' file not found
#include <emmintrin.h>
         ^~~~~~~~~~~~~
1 error generated.
*** Error code 1

Stop.
make[4]: stopped in /usr/src/lib/clang/libclang

I'm building on a 12.0-CURRENT VirtualBox guest at r326430.  I've checked
that my /usr/src is clean and deleted /usr/obj to no effect.  I have dug
into SourceManager.cpp and the #include is protected by a #if __SSE2__,
which is relying on clang internal checks to define (and my CPU supports
SSE2).  Does anyone have any ideas to explain what is going on?

--=20
Peter Jeremy

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