Date: Thu, 15 Jun 2017 21:34:58 -0700 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Cc: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: -r319936 and -r319991 TARGET_ARCH=powerpc via clang: boot1.chrp/boot1.c:(.text+0x14b8): undefined reference to `__udivdi3' (boot1.o: In function `fsread_size') Message-ID: <23CFE929-1A90-430E-A3E6-C9B56F642F8D@dsl-only.net> In-Reply-To: <E39EEE8E-29B0-4F32-8A07-3C11FA728DF0@dsl-only.net> References: <D1A5D702-7C77-4288-93E2-3C41A6F5417F@dsl-only.net> <E39EEE8E-29B0-4F32-8A07-3C11FA728DF0@dsl-only.net>
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[I should have listed more about my build context for clang.]
On 2017-Jun-15, at 9:20 PM, Mark Millard <markmi at dsl-only.net> wrote:
> [A gcc 4.2.1 based buildworld buildkernel did not have this problem.]
>=20
> On 2017-Jun-15, at 5:34 PM, Mark Millard <markmi at dsl-only.net> =
wrote:
>=20
>> Context: amd64 -> powerpc cross build of -r319936
>> (one of my usual clang-based experiments):
>>=20
>> --- all_subdir_sys ---
>> Building =
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/boot/powerpc/boot1.=
chrp/boot1.elf
>> --- boot1.elf ---
>> boot1.o: In function `fsread_size':
>> /usr/src/sys/boot/powerpc/boot1.chrp/boot1.c:(.text+0x14b8): =
undefined reference to `__udivdi3'
>> /usr/src/sys/boot/powerpc/boot1.chrp/boot1.c:(.text+0x1508): =
undefined reference to `__udivdi3'
>> cc: error: linker command failed with exit code 1 (use -v to see =
invocation)
>> --- all_subdir_lib ---
>> Building =
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/lib/msun/s_remquo.po
>> --- all_subdir_sys ---
>> *** [boot1.elf] Error code 1
>>=20
>> make[6]: stopped in /usr/src/sys/boot/powerpc/boot1.chrp
>> .ERROR_TARGET=3D'boot1.elf'
>> =
.ERROR_META_FILE=3D'/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys=
/boot/powerpc/boot1.chrp/boot1.elf.meta'
>>=20
>>=20
>> # Meta data file =
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/boot/powerpc/boot1.=
chrp/boot1.elf.meta
>> CMD cc -target powerpc-unknown-freebsd12.0 =
--sysroot=3D/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp =
-B/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/usr/bin =
-ffreestanding -msoft-float =
-I/usr/src/sys/boot/powerpc/boot1.chrp/../../common =
-I/usr/src/sys/boot/powerpc/boot1.chrp/../../../ -D_STANDALONE =
-std=3Dgnu99 -Qunused-arguments -nostdlib -static -Wl,-N -o boot1.elf =
boot1.o ashldi3.o syncicache.o =20
>> CWD =
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/boot/powerpc/boot1.=
chrp
>> TARGET boot1.elf
>> -- command output --
>> boot1.o: In function `fsread_size':
>> /usr/src/sys/boot/powerpc/boot1.chrp/boot1.c:(.text+0x14b8): =
undefined reference to `__udivdi3'
>> /usr/src/sys/boot/powerpc/boot1.chrp/boot1.c:(.text+0x1508): =
undefined reference to `__udivdi3'
>> cc: error: linker command failed with exit code 1 (use -v to see =
invocation)
>> *** Error code 1
>>=20
>> Note: This was -j16 for the build.
>>=20
>> I updated /usr/src and amd64 to -r319991 and then
>> retried cross building for powerpc: same result.
>>=20
>>=20
>> Note: I'd frozen at -r317820 until this update. Back then
>> I could buildworld and buildkernel via clang (although
>> I could not boot the clang-based kernel and so had to
>> build a gcc 4.2.1 based one and use it).
>=20
> I tried a gcc 4.2.1 buildworld buildkernel and it
> completed fine.
>=20
> The __udivdi3 problem is clang toolchain specific.
Clang based build-context details:
# more =
~/sys_build_scripts.amd64-host/make_powerpcvtsc_nodebug_clang_bootstrap-am=
d64-host.sh=20
kldload -n filemon && \
script =
~/sys_typescripts/typescript_make_powerpcvtsc_nodebug_clang_bootstrap-amd6=
4-host-$(date +%Y-%m-%d:%H:%M:%S) \
env __MAKE_CONF=3D"/root/src.configs/make.conf" SRCCONF=3D"/dev/null" =
SRC_ENV_CONF=3D"/root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-h=
ost" \
WITH_META_MODE=3Dyes \
MAKEOBJDIRPREFIX=3D"/usr/obj/powerpcvtsc_clang" \
make $*
# more /root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-host
TO_TYPE=3Dpowerpc
#
KERNCONF=3DGENERICvtsc-NODBG
TARGET=3D${TO_TYPE}
.if ${.MAKE.LEVEL} =3D=3D 0
TARGET_ARCH=3D${TO_TYPE}
.export TARGET_ARCH
.endif
#
WITH_CROSS_COMPILER=3D
WITHOUT_SYSTEM_COMPILER=3D
#
WITH_LIBCPLUSPLUS=3D
WITH_BINUTILS_BOOTSTRAP=3D
WITH_ELFTOOLCHAIN_BOOTSTRAP=3D
WITH_CLANG_BOOTSTRAP=3D
WITH_CLANG=3D
WITH_CLANG_IS_CC=3D
WITH_CLANG_FULL=3D
WITH_CLANG_EXTRAS=3D
WITH_LLD=3D
# lldb requires missing atomic 8-byte operations for powerpc (non-64)
WITHOUT_LLDB=3D
#
WITH_BOOT=3D
WITHOUT_LIB32=3D
#
WITHOUT_GCC_BOOTSTRAP=3D
WITHOUT_GCC=3D
WITHOUT_GCC_IS_CC=3D
WITHOUT_GNUCXX=3D
#
NO_WERROR=3D
#
# Use WERROR to avoid stopping at the likes of:
# error: implicit conversion from 'int' to 'int8_t' (aka 'signed char') =
changes value from 128 to -128 [-Werror,-Wconstant-conversion]
WERROR=3D
MALLOC_PRODUCTION=3D
#
WITH_REPRODUCIBLE_BUILD=3D
WITH_DEBUG_FILES=3D
So the system binutils tools are in used.
Even though I build lld, last I tried lld could not
be used so it is not the linker used by the above.
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
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