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Date:      Fri, 28 Apr 2017 17:24:27 -0700
From:      Mark Millard <markmi@dsl-only.net>
To:        svn-ports-head@freebsd.org, Mark Linimon <linimon@lonesome.com>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org>
Cc:        Baptiste Daroussin <bapt@FreeBSD.org>, Alexander Kabaev <kabaev@gmail.com>
Subject:   Re: svn commit: r439595 - in head/devel: aarch64-gcc aarch64-none-elf-gcc  amd64-gcc arm-none-eabi-gcc arm-none-eabi-gcc492 mips-gcc mips64-gcc  powerpc64-gcc riscv64-gcc sparc64-gcc
Message-ID:  <B15B5A54-B48B-4BBA-BB55-8D24652833AD@dsl-only.net>
In-Reply-To: <8E45FA57-8D2E-4159-8E02-6A5044000CC2@dsl-only.net>
References:  <8E45FA57-8D2E-4159-8E02-6A5044000CC2@dsl-only.net>

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On 2017-Apr-28, at 3:27 PM, Mark Millard <markmi at dsl-only.net> wrote:

> Just FYI:
>=20
> https://reviews.freebsd.org/D10537 may help with powerpc64-gcc
> slave ports (and powerpc64-gcc itself) when they are built on
> the type of machine that they target.
>=20
> As of devel/*binutils -r436732 and -r432733 (the update
> to 2.28) many things are broken for linking with debug
> information that were not before (for example). It turns
> out to be because of a change in return code for reporting
> issues for the cases I know about: the new return code
> stops the build (and the return code is likely appropriate
> long term as I understand). For example a formerly ignored
> debug information issue now blocks various builds when a
> (modern) binutils is involved.
>=20
> [Because of this I've been reverting devel/*binutils
> to -r436731 each time I update the revision of
> /usr/ports.]
>=20
> As of ports head -r439263 with reverting
> devel/*binutils to -r436731 and the patch
> from D10537 I tested building the following
> earlier today as part of reviewing D10537:
>=20
> amd64: built amd64-gcc powerpc64-gcc aarch64-gcc
> powerpc64: built powerpc64-gcc
> aarch64: built aarch64-gcc
> (Note: aarch64 is using -mcpu=3Dcortex-a53 explicitly.)
>=20
> Context: head -r317015 in each case.
> (WITH_LLD_IS_LD=3D was used on aarch64.)
> (powerpc64 is system-clang/libc++ based, used
> devel/*binutils)
>=20
> If the information would be useful I could try
> some other combinations under the patch and
> the older binutils for comparison. (That does
> not say when anyone might use the information.)
>=20
> I also have access to armv7. (In this context
> I normally use -mcpu=3Dcortex-a7 explicitly.)
> So I could try that type of host as well.
>=20
> I do not have access to mips, mips64, riscv, sparc64
> so they could be targets but not hosts in my tests:
> always cross-builds.
>=20
> I have access to powerpc but currently am not well
> set up to use it without rebuilding it as gcc 4.2.1
> based for buildworld, not just buildkernel. (clang
> generates bad stack handling for some contexts for
> 32-bit powerpc.)

I tried building devel/amd64-gcc on a powerpc64
head -r317015 system that was built with clang
and libc++ and has clang as its system compiler.
/usr/ports as of -r439263 but devel/*binutils as
of -r436731 (so 2.27 instead of 2.2.8). The result
was the "=3Da" problem for the clang based build:

=
/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/config/i38=
6/cpuid.h:223:3: error: invalid output constraint '=3Da' in asm
  __cpuid (__ext, __eax, __ebx, __ecx, __edx);
  ^
=
/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/config/i38=
6/cpuid.h:165:7: note: expanded from macro '__cpuid'
           : "=3Da" (a), "=3Db" (b), "=3Dc" (c), "=3Dd" (d)     \
. . . (other such messages) . . .
In file included from =
/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/c-family/c=
ppspec.c/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/co=
nfig/i386/driver-i386.c:554::225: error: invalid output constraint '=3Da' =
in asm
. . .
          : "=3Da" (eax), "=3Dd" (edx)
           ^
. . .

So this system-clang context on powerpc64 is like -r439595
reports for building devel/amd64-gcc on aarch64:

+BROKEN_aarch64=3D		error: invalid output constraint '=3Da' =
in asm

head/devel/amd64-gcc/Makefile only says:

 BROKEN_powerpc64=3D	Does not build

but it is like on aarch64 --at least when system-clang
compiler that is in use.

The compiler command lines were:

c++ -std=3Dgnu++98 -fno-PIE -c   -O2 -pipe -B/usr/local/bin/ =
-DLIBICONV_PLUG -g -fno-strict-aliasing -B/usr/local/bin/  =
-DLIBICONV_PLUG -DIN_GCC    -fno-strict-aliasing -fno-exceptions =
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing =
-Wwrite-strings -Wcast-qual -Wmissing-format-attribute =
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros =
-Wno-overlength-strings   -DHAVE_CONFIG_H -I. -I. =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/. =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../inclu=
de =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libcp=
p/include -I/usr/local/include  =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libde=
cnumber =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libde=
cnumber/dpd -I../libdecnumber =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libba=
cktrace  -B/usr/local/bin/ -DLIBICONV_PLUG -o driver-i386.o -MT =
driver-i386.o -MMD -MP -MF ./.deps/driver-i386.TPo =
/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/config/i38=
6/driver-i386.c

c++ -std=3Dgnu++98 -fno-PIE -c   -O2 -pipe -B/usr/local/bin/ =
-DLIBICONV_PLUG -g -fno-strict-aliasing -B/usr/local/bin/  =
-DLIBICONV_PLUG -DIN_GCC    -fno-strict-aliasing -fno-exceptions =
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing =
-Wwrite-strings -Wcast-qual -Wmissing-format-attribute =
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros =
-Wno-overlength-strings   -DHAVE_CONFIG_H -I. -Ic-family =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/c-family=
 =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../inclu=
de =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libcp=
p/include -I/usr/local/include  =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libde=
cnumber =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libde=
cnumber/dpd -I../libdecnumber =
-I/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/../libba=
cktrace  -B/usr/local/bin/ -DLIBICONV_PLUG -o c-family/cppspec.o -MT =
c-family/cppspec.o -MMD -MP -MF c-family/.deps/cppspec.TPo =
/usr/obj/portswork/usr/ports/devel/amd64-gcc/work/gcc-6.3.0/gcc/c-family/c=
ppspec.c

It will be a fairly long time before the aarch64
context gets to this point in a devel/adm64-gcc
build, although I expect a replication of the
reported behavior for building devel/amd64-gcc .

=3D=3D=3D
Mark Millard
markmi at dsl-only.net





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