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Date:      Mon, 24 Jun 2013 13:58:32 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Jordan Hubbard <jordan.hubbard@gmail.com>
Cc:        freebsd-arm@freebsd.org
Subject:   Re: Raspberry pi not ready to self-host yet?
Message-ID:  <96A5DFDF-6601-405B-BA2F-527C256C0424@bsdimp.com>
In-Reply-To: <B4EF71AD-FA65-4D56-AB1D-AA4C25277324@mail.turbofuzz.com>
References:  <800732D1-B06A-40AE-AE69-F6170662B2AA@turbofuzz.com> <3B1B1A39-13AF-4718-A9D6-757D6FEFC27F@bsdimp.com> <B4EF71AD-FA65-4D56-AB1D-AA4C25277324@mail.turbofuzz.com>

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On Jun 24, 2013, at 12:36 PM, Jordan Hubbard wrote:

>=20
> On Jun 24, 2013, at 8:01 AM, Warner Losh <imp@bsdimp.com> wrote:
>=20
>>=20
>> On Jun 24, 2013, at 8:55 AM, Jordan K. Hubbard wrote:
>>=20
>>> Hi folks,
>>>=20
>>> I followed the instructions in the repo at =
https://github.com/daveish/freebsd-arm-tools.git and was able to create =
a bootable SD image for my 512Mb PI in no time with very little hassle - =
nice job there!
>>>=20
>>> What I can't seem to manage, however, is to self-host after that.   =
I see someone has already filed =
http://www.freebsd.org/cgi/query-pr.cgi?pr=3D178495 covering the failure =
during buildworld,   You see the same compilation error in =
basic_string.tcc in various ports, like apr:
>>>=20
>>> 0.	Program arguments: /usr/bin/c++ -cc1 -triple =
armv6-unknown-freebsd10.0 -S -disable-free -main-file-name cxx_db.cpp =
-mrelocation-model pic -pic-level 2 -mdisable-fp-elim =
-mconstructor-aliases -target-abi apcs-gnu -target-cpu arm1136jf-s =
-msoft-float -mfloat-abi soft -target-feature +soft-float =
-target-feature +soft-float-abi -target-feature -neon -coverage-file =
/tmp/cxx_db-5qpGsC.s -resource-dir /usr/bin/../lib/clang/3.3 -D =
_THREAD_SAFE -D PIC -I . -I ./../dist/.. -O2 -fdeprecated-macro =
-fno-dwarf-directory-asm -fdebug-compilation-dir =
/a/ports/databases/db42/work/db-4.2.52/build_unix -ferror-limit 19 =
-fmessage-length 144 -mstackrealign -fno-signed-char =
-fobjc-runtime=3Dgnustep -fobjc-default-synthesize-properties =
-fcxx-exceptions -fexceptions -fsjlj-exceptions =
-fdiagnostics-show-option -fcolor-diagnostics -backend-option =
-vectorize-loops -o /tmp/cxx_db-5qpGsC.s -x c++ =
./../dist/../cxx/cxx_db.cpp=20
>>> 1.	/usr/include/c++/4.2/bits/basic_string.tcc:978:43: current =
parser token ';'
>>> 2.	/usr/include/c++/4.2/bits/basic_string.tcc:48:1 =
<Spelling=3D/usr/include/c++/4.2/bits/c++config.h:76:38>: parsing =
namespace 'std'
>>> c++: error: unable to execute command: Segmentation fault (core =
dumped)
>>> c++: error: clang frontend command failed due to signal (use -v to =
see invocation)
>>=20
>> do you have enough swap? Clang is a memory pig dog...
>=20
> [root@pi /usr/obj/a/src/sys/RPI-B]# swapinfo
> Device                        512-blocks     Used    Avail Capacity
> /dev/mmcsd0s2b     4194304           168  4194136     0%
> /dev/da0b                  8192000           312  8191688     0%
> Total                         12386304           480 12385824     0%
>=20
> I don't think I'm hitting any memory limits, though I'll also note =
that kern.maxswzone is compiled a bit on the small side since my =F0=9F=8D=
=87=CF=80 always complains that it can't utilize the swap it has:
>=20
> warning: total configured swap (1548288 pages) exceeds maximum =
recommended amount (761152 pages).
> warning: increase kern.maxswzone or reduce amount of swap.

That's ~3GB, plus ~300MB of RAM...  Not a good ratio, but still should =
be plenty. I have a 4GB system without swap that can do an amd64 =
build...

> I tried raising this in /boot/loader.conf but it didn't seem to have =
any effect.  I assumed that perhaps the boot path was different on the =
Pi and didn't put too much work into that.
>=20
>> I've self-hosted FreeBSD on an Atmel AT91SAM9620 recently (arm v5 =
board)...  Seems odd that cross compile and native built give different =
results. Will look into it. Btw, whats uname -p say for you?
>=20
> armv6

That looks right...

> Others have pointed out that clang may not be ready for prime-time yet =
on ARM.  I don't have much to compare with since Apple is already on =
clang/LLVM 5.0 and FreeBSD is back with 3.3 - I don't even really =
remember what the state of ARM support was that long ago. :-)

heh. I thought we were more up to date :)

Warner




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