Raspberry pi not ready to self-host yet?

[Warner Losh]

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

> 
> On Jun 24, 2013, at 8:01 AM, Warner Losh <imp at bsdimp.com> wrote:
> 
>> 
>> On Jun 24, 2013, at 8:55 AM, Jordan K. Hubbard wrote:
>> 
>>> Hi folks,
>>> 
>>> 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!
>>> 
>>> 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=178495 covering the failure during buildworld,   You see the same compilation error in basic_string.tcc in various ports, like apr:
>>> 
>>> 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=gnustep -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 
>>> 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=/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)
>> 
>> do you have enough swap? Clang is a memory pig dog...
> 
> [root at 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%
> 
> 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 🍇π always complains that it can't utilize the swap it has:
> 
> 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.
> 
>> 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?
> 
> 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