Re: multilib support?

[Zhenqiang Chen <zhenqiang dot chen at linaro dot org>]

On 6 December 2012 00:23, Chris Morgan <chmorgan@gmail.com> wrote:
> On Mon, Dec 3, 2012 at 9:20 PM, Zhenqiang Chen
> <zhenqiang.chen@linaro.org> wrote:
>> On 4 December 2012 03:52, Chris Morgan <chmorgan@gmail.com> wrote:
>>> On Fri, Nov 30, 2012 at 8:50 AM, Chris Morgan <chmorgan@gmail.com> wrote:
>>>> Hello.
>>>>
>>>> I'm looking to use ct-ng to build an arm toolchain but I see that when
>>>> I build with multilib enabled I end up with these errors:
>>>>
>>>> [INFO ]  =================================================================
>>>> [INFO ]  Installing binutils for host
>>>> [INFO ]  Installing binutils for host: done in 142.17s (at 11:46)
>>>> [INFO ]  =================================================================
>>>> [INFO ]  Installing pass-1 core C compiler
>>>> [ERROR]    checking dynamic linker characteristics... checking whether
>>>> getchar_unlocked is declared... configure: error: Link tests are not
>>>> allowed after GCC_NO_EXECUTABLES.
>>>> [ERROR]    checking whether putchar_unlocked is declared... make[1]:
>>>> *** [configure-zlib] Error 1
>>>> [ERROR]
>>>> [ERROR]  >>
>>>> [ERROR]  >>  Build failed in step 'Installing pass-1 core C compiler'
>>>> [ERROR]  >>        called in step '(top-level)'
>>>> [ERROR]  >>
>>>> [ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@257]
>>>> [ERROR]  >>        called from: do_cc_core_backend[scripts/build/cc/gcc.sh@448]
>>>> [ERROR]  >>        called from: do_cc_core_pass_1[scripts/build/cc/gcc.sh@101]
>>>> [ERROR]  >>        called from: main[scripts/crosstool-NG.sh@624]
>>>> [ERROR]  >>
>>>> [ERROR]  >>  For more info on this error, look at the file: 'build.log'
>>>> [ERROR]  >>  There is a list of known issues, some with workarounds, in:
>>>> [ERROR]  >>      'docs/B - Known issues.txt'
>>>> [ERROR]
>>>> [ERROR]  (elapsed: 13:04.23)
>>>> [13:05] / make: *** [build] Error 2
>>>>
>>>> This is latest hg crosstool, experimental enabled, interwork enabled,
>>>> multilib enabled, arm architecture. Everything else the default (I can
>>>> send configuration file of course if someone wants to see it).
>>>>
>>>> I'm trying to convince a colleague that we should be using something
>>>> like ct-ng instead of a hand assembled makefile, to build our
>>>> toolchain but without multilib support it looks like we'd end up with
>>>> two toolchains, one for arm7tdmi and one for a cortex-m3 whereas
>>>> multilib would let us build one toolchain that supported the whole
>>>> range of arm processors.
>>>>
>>>> The makefile he has assembled seems pretty simple, 110 lines, so I
>>>> can't understand why this isn't easier to do with ct-ng.
>>>>
>>>> Chris
>>>
>>>
>>> Using my colleagues makefile I ran into the same issue. It turns out
>>> that passing --with-system-zlib to gcc's configure got things building
>>> to completion although I can't say whether the toolchain works as
>>> expected yet. Haven't had a chance to test it.
>>
>> To fix the zlib build issue, you need install multilib version host
>> gcc like gcc-4.1-multilib & g++-4.1-multilib.
>>
>> -Zhenqiang
>
>
> How do those packages fix it? I've searched but can't figure out what
> the purpose of the multilib packages are in terms of addressing this
> issue. Maybe Fedora 17 includes these by default that's why it works
> there?

Sorry I do not know the root cause. Just get the workaround years ago
from google search. Might be a gcc/zlib configure bug.

-Zhenqiang

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