Re: multilib support?

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

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

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