Re: [gentoo-embedded] configure: error: C++ compiler cannot create executables

[Kfir Lavi]

On Mon, Nov 8, 2010 at 12:04 PM, Kfir Lavi <lavi.kfir@×××××.com> wrote:

>
>
> On Wed, Nov 3, 2010 at 8:32 PM, Kfir Lavi <lavi.kfir@×××××.com> wrote:
>
>>
>>
>> On Wed, Nov 3, 2010 at 7:50 PM, Kfir Lavi <lavi.kfir@×××××.com> wrote:
>>
>>>
>>>
>>> On Wed, Nov 3, 2010 at 12:33 PM, Kfir Lavi <lavi.kfir@×××××.com> wrote:
>>>
>>>>
>>>>
>>>> On Tue, Nov 2, 2010 at 2:49 PM, Manuel Lauss <
>>>> manuel.lauss@××××××××××.com> wrote:
>>>>
>>>>> On Sun, Oct 31, 2010 at 9:08 AM, Kfir Lavi <lavi.kfir@×××××.com>
>>>>> wrote:
>>>>> > Hi,
>>>>> > I have a cross compilation environment inside a chroot.
>>>>> > I run:
>>>>> > i686-unknown-linux-gnu-emerge dev-libs/ace
>>>>> > ...
>>>>> > checking for i686-unknown-linux-gnu-g++... i686-unknown-linux-gnu-g++
>>>>> > checking for C++ compiler default output file name... configure:
>>>>> > error: C++ compiler cannot create executables
>>>>>
>>>>> Have a look at config.log.  It tells exactly what went wrong, including
>>>>> gcc
>>>>> error output.
>>>>>
>>>>> Manuel
>>>>>
>>>>> It seems that one of the steps that I do, is deleting the tools. I need
>>>> then to install again from package from the mother system (I'm running here
>>>> as chroot, and its very good that I did so).
>>>> So I install gcc and binutils, then compile them again in the chroot
>>>> environment.
>>>> Using i686-unknown-linux-gnu-emerge and everything happens again.
>>>> I didn't find the culprit yet.
>>>>
>>>> Kfir
>>>>
>>>
>>> It seems that installing dev-libs/ace is causing the problem.
>>> emerge dev-libs/ace [works]
>>> i686-gentoo-linux-gnu-g++ [works]
>>> i686-gentoo-linux-gnu-gcc [works]
>>> gcc [works]
>>> g++ [works]
>>> i686-gentoo-linux-gnu-emerge  dev-libs/ace [DONT WORK]
>>>
>>> Other packages emerging ok with i686-gentoo-linux-gnu-emerge.
>>> Can someone give me a hint? or something to check?
>>>
>>> Thanks,
>>> Kfir
>>>
>>
>> Some diagnostics:
>> $ cd /usr/__CHOST__/tmp/portage/dev-libs/ace-5.7.2/work/ACE_wrappers/build
>> $ ../configure
>> checking build system type... i686-pc-linux-gnu
>> checking host system type... i686-pc-linux-gnu
>> checking target system type... i686-pc-linux-gnu
>> checking for a BSD-compatible install... /usr/bin/install -c
>> checking whether build environment is sane... yes
>> checking for gawk... gawk
>> checking whether make sets $(MAKE)... yes
>> checking for egrep... grep -E
>> checking whether #! works in shell scripts... yes
>> checking for g++... g++
>> checking for C++ compiler default output file name... a.out
>> checking whether the C++ compiler works... yes
>> checking whether we are cross compiling... no
>> checking for suffix of executables...
>> checking for suffix of object files... o
>> checking whether we are using the GNU C++ compiler... yes
>> checking whether g++ accepts -g... yes
>> checking for style of include used by make... GNU
>> checking dependency style of g++... gcc3
>> checking how to run the C++ preprocessor... g++ -E
>>
>> Here we see that configure passes the test it failed with emerge.
>> One line did grab my attention: checking whether we are cross compiling...
>> no
>>
>> Maybe the environment that i686-gentoo-linux-gnu-emerge creates is not
>> working for ACE.
>>
>> What do you think?
>>
>> Regards,
>> Kfir
>>
>
> I did again a cross compilation, really the same way I did before, but with
> a different name.
> crossdev -P -vt i686-gentoo1-linux-gnu
> But without the -S, so it compiled all the latest and greatest.
>
> Now the problem is solved, but still ACE will stuck on another line:
> checking for epoll_create... configure: error: cannot run test program
> while cross compiling
> See `config.log' for more details.
>
> But this is for different thread.
>
> Regards,
> Kfir
>
I have created an ebuild that deletes the epoll test from configure.
I have posted it here: http://bugs.gentoo.org/show_bug.cgi?id=348521
After eliminating the epoll test, the compilation passes.

Regards,
Kfir