Building rpi armv6 toolchain on macOS

[Alexey Neyman]

You skipped the first two steps (CT_OBSOLETE + 'ct-ng oldconfig'), 
didn't you?

Regards,
Alexey.


On 03/11/2017 01:06 PM, Etan Kissling wrote:
> Thanks for the quick reply!
>
> With the master build, I run into an error quite quickly (following instructions from crosstool-ng.org).
> [DEBUG]  ==> Executing: 'mkdir' '-p' '/build'
> [ALL  ]  mkdir: /build: Permission denied
> - Full log: https://scriptreactor.com/rpi1-master-build.log
>
> Any idea what's going on here?
>
> Trying out with your adjusted settings on 1.22 for now. Will take a while ^^
>
>> On 9 Mar 2017, at 19:21, Alexey Neyman <stilor@att.net> wrote:
>>
>> I have reproduced your issue on current master with the following changes to .config (extracted .config from your build.log with "ct-ng extractconfig < build.log > .config"):
>>
>> - set CT_OBSOLETE=y
>> - ct-ng oldconfig
>> - set GCC to 4.9.4 and kernel to 4.1.38 (latest on 4.9.x and 4.1.x branches)
>>
>> However, I noted that you have set "Patches origin" option to "none". This prohibits crosstool-ng from applying any patches it has for any packages. In your configuration, setting it to "bundled" makes the build succeed (on master).
>>
>> You can try to find out which of the patches fixes your issue. Likely it is one in patches/glibc/2.19, patches/binutils/2.25.1 or patches/gcc/4.9.4.
>>
>> As a side note, I'd recommend using master on macos rather than 1.22 - there has been a lot of macos fixes since.
>>
>> Regards,
>> Alexey.
>>
>>
>> On 03/09/2017 04:15 AM, Etan Kissling wrote:
>>> Hi,
>>>
>>> I'm trying to build a toolchain that supports cross compilation for the Raspberry Pi Zero W.
>>> This requires building for ARMv6 (same as for the old Raspberry Pi 1).
>>>
>>> The official repository contains a crosstool-ng config file here:
>>> https://github.com/raspberrypi/tools/blob/master/configs/arm-rpi-4.9.3-linux-gnueabihf.config
>>> Unfortunately, only Linux binaries are provided in the repo. So for macOS I need to start from this config.
>>>
>>> The changes I did to the config file so far are:
>>> Undefine CT_CONFIGURE_has_xz
>>> Set CT_LOCAL_TARBALLS_DIR / CT_WORK_DIR / CT_PREFIX_DIR to reside on case-sensitive file systems
>>> CT_EXTRA_CFLAGS_FOR_HOST="-fbracket-depth=512"
>>> This fixes "[ERROR] /tmp/ct-ng/fs/.build/src/gcc-4.9.3/gcc/config/arm/neon.md:3486:10917: fatal error: bracket nesting level exceeded maximum of 256".
>>> CT_WANTS_STATIC_LINK=n
>>> CT_CC_GCC_STATIC_LIBSTDCXX=n
>>> These two fix errors during initial sanity checking.
>>> I'm currently stuck at the step "Installing C library headers & start files" where I get these errors during assembly of ../ports/sysdeps/unix/sysv/linux/arm/libc-aeabi_read_tp.S:
>>> ccL1wvil.s: Assembler messages:
>>> ccL1wvil.s:70: Error: invalid constant (ae) after fixup
>>> ccL1wvil.s:143: Error: invalid constant (ff) after fixup
>>>
>>> I tried with -mthumb (which leads to "conftest.c:14:1: sorry, unimplemented: Thumb-1 hard-float VFP ABI")
>>> and with -nostartfiles (which lets assembly work for this file but doesn't work on the next one (../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S)
>>>
>>> The complete build logs can be found here:
>>> https://scriptreactor.com/rpi1-fixup-error.build.log
>>> https://scriptreactor.com/rpi1-fixup-error-nostartfiles.build.log (with -nostartfiles)
>>>
>>> Any idea on what could be tried next?
>>>
>>> Xcode version: 8.2.1 (8C1002)
>>> maxOS version: 10.12.3 (16D32)
>>> crosstool-ng installed via "brew install crosstool-ng --with-grep"
>>>
>>> Thanks for any input!
>>>
>>> Etan
>>>
>>>
>>>
>>>
>