[Bug 214902] head -r309179 buildworld on powerpc64 via clang 3.9.0: llvm::sys::CompareAndSwap and llvm::sys::MemoryFence undefined so build stops

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214902

--- Comment #3 from Mark Millard <markmi at dsl-only.net> ---
Created attachment 177643
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=177643&action=edit
List Support/Atomic.cpp in libllvmminimal/Makefile

This allowed an old PowerMac G5 to buildworld ( WITHOUT_LIB32= ),
installworld, reboot via clang 3.9.0 on:

# uname -paKU
FreeBSD FBSDG5L 12.0-CURRENT FreeBSD 12.0-CURRENT #1 r309179M: Mon Nov 28
01:23:26 PST 2016    
markmi at FreeBSDx64:/usr/obj/powerpc64vtsc_xtoolchain_kernel/powerpc.powerpc64/usr/src/sys/GENERIC64vtsc-NODBG
 powerpc powerpc64 1200017 1200017

(with what later was -r309201 manually applied)

using:

-r416639 of devel/binutils
and
-r407342 of devel/powerpc-binutils
(slave port tracks devel/binutils)
(avoiding 2.47 vintages)

with:

Script started on Fri Dec  2 18:40:48 2016
Command: env __MAKE_CONF=/root/src.configs/make.conf SRCCONF=/dev/null
SRC_ENV_CONF=/root/src.configs/src.conf.powerpc64-clang_altbinutils.powerpc64-host
WITH_META_MODE=yes
MAKEOBJDIRPREFIX=/usr/obj/powerpc64vtsc_clang_altbinutils_world/powerpc.powerpc64
make -j 5 buildworld

and:

# more
~/src.configs/src.conf.powerpc64-clang_altbinutils-bootstrap.powerpc64-host 
TO_TYPE=powerpc64
TOOLS_TO_TYPE=${TO_TYPE}
VERSION_CONTEXT=12.0
#
KERNCONF=GENERIC64vtsc-NODBG
TARGET=powerpc
.if ${.MAKE.LEVEL} == 0
TARGET_ARCH=${TO_TYPE}
.export TARGET_ARCH
.endif
#
WITH_CROSS_COMPILER=
WITHOUT_SYSTEM_COMPILER=
#
WITH_LIBCPLUSPLUS=
WITHOUT_BINUTILS_BOOTSTRAP=
WITH_CLANG_BOOTSTRAP=
WITH_CLANG=
WITH_CLANG_IS_CC=
WITH_CLANG_FULL=
WITH_CLANG_EXTRAS=
WITH_LLDB=
#
WITH_BOOT=
# world32/usr/src/lib/csu/powerpc/crti.o got:
# csu/powerpc/crti.S:34:13: error: unexpected token in memory operand
# csu/powerpc/crti.S:35:2: error: invalid instruction mnemonic 'mflr'
# and the like. So avoid LIB32.
WITHOUT_LIB32=
#
WITHOUT_ELFTOOLCHAIN_BOOTSTRAP=
WITHOUT_GCC_BOOTSTRAP=
WITHOUT_GCC=
WITHOUT_GCC_IS_CC=
WITHOUT_GNUCXX=
#
NO_WERROR=
#WERROR=
MALLOC_PRODUCTION=
#
WITH_DEBUG_FILES=
#
#
# For TO (so-called "cross") stages . . .
# So-called-cross via ${TO_TYPE}-xtoolchain-gcc/${TO_TYPE}-gcc. . .
# TOOLS_TO_TYPE based on ${TO_TYPE}-xtoolchain-gcc related binutils. . .
#
CROSS_BINUTILS_PREFIX=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/
.if ${.MAKE.LEVEL} == 0
XAS=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/as
XAR=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ar
XLD=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ld
XNM=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/nm
XOBJCOPY=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/objcopy
XOBJDUMP=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/objdump
XRANLIB=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ranlib
XSIZE=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/size
#NO-SUCH: XSTRINGS=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/strings
XSTRINGS=/usr/local/bin/${TOOLS_TO_TYPE}-freebsd-strings
.export XAS
.export XAR
.export XLD
.export XNM
.export XOBJCOPY
.export XOBJDUMP
.export XRANLIB
.export XSIZE
.export XSTRINGS
.endif
#
#
# From based on clang (via system). . .
#
.if ${.MAKE.LEVEL} == 0
CC=/usr/bin/clang -B ${CROSS_BINUTILS_PREFIX}
CXX=/usr/bin/clang++ -B ${CROSS_BINUTILS_PREFIX}
CPP=/usr/bin/clang-cpp -B ${CROSS_BINUTILS_PREFIX}
.export CC
.export CXX
.export CPP
AS=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/as
AR=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ar
LD=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ld
NM=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/nm
OBJCOPY=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/objcopy
OBJDUMP=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/objdump
RANLIB=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/ranlib
XSIZE=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/size
#NO-SUCH: STRINGS=/usr/local/${TOOLS_TO_TYPE}-freebsd/bin/strings
STRINGS=/usr/local/bin/${TOOLS_TO_TYPE}-freebsd-strings
.export AS
.export AR
.export LD
.export NM
.export OBJCOPY
.export OBJDUMP
.export RANLIB
.export SIZE
.export STRINGS
.endif

The powerpc64 was already running head -r309179 via a cross build
( WITHOUT_LIB32= ) from an amd64 context.

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