Re: multilib support?

[Chris Morgan <chmorgan at gmail dot com>]

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?

Chris

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