[llvm-dev] llvm build failed while Linking CXX shared library ../../../lib/libc++.so

[Ioannis Koukoulis via llvm-dev]

Hi Dimitry, this definitely worked. I am passed by the linking errors
regarding libc++ or similar. My build stopped now at 95% while linking a
clang extra, I am not pretty sure which because i do not have my laptop,
possible the clang-rename, if such exists.
No undefined references here, however, my hdd's free space run out, so this
might be the cause. I have to move or expand now, alas!! The build is too
big.
I will keep you posted as soon as i'll get down to it. Thank you so far.





Ioannis Koukoulis

On 29 March 2016 at 00:31, Dimitry Andric <dimitry at andric.com> wrote:

> Hi Ioannis,
>
> Just delete the projects/libcxx directory, then rebuild from scratch.  You
> should only need to checkout llvm (in the top level directory) and cfe
> (into the tools/clang subdirectory).
>
> -Dimitry
>
> On 29 Mar 2016, at 00:08, Ioannis Koukoulis <i.g.koukoulis at gmail.com>
> wrote:
>
> Hi Dimitry,
>
> I do not particularly need to build libc++ from the package. Is the name
> of the package's libc++, libcxx, because this is where the installation
> starts finding undefined references, during linking CXX shared library
> ../../../lib/libc++.so. Please check below the first part of the log when
> the first error appear, I omited repeating results. Furthermore, the
> undefined references are thousands!
> If you say that libc++ is not need it how can I skip it's interference.
> Shall I check out the package again without the particular libc++, of
> invoke cmake with a particular parameter?
>
>
> .
> .
> [ 52%] Built target gtest
> [ 52%] Built target gtest_main
> Linking CXX shared library ../../../lib/libc++.so
> CMakeFiles/cxx.dir/__/src/ios.cpp.o: In function
> `std::__1::iostream_category()':
> /opt/llvm/llvm/projects/libcxx/src/ios.cpp:71: undefined reference to
> `__cxa_guard_acquire'
> /opt/llvm/llvm/projects/libcxx/src/ios.cpp:71: undefined reference to
> `__cxa_guard_release'
> CMakeFiles/cxx.dir/__/src/ios.cpp.o: In function
> `std::__1::ios_base::clear(unsigned int)':
> CMakeFiles/cxx.dir/__/src/ios.cpp.o: In function
> `std::__1::basic_istream<char, std::__1::char_traits<char>
> >::operator>>(std::__1::basic_streambuf<char, std::__1::char_traits<char>
> >*)':
> /opt/llvm/llvm/projects/libcxx/include/istream:900: undefined reference to
> `__cxa_begin_catch'
> /opt/llvm/llvm/projects/libcxx/include/istream:900: undefined reference to
> `__cxa_end_catch'
> .
> .
> .
>
> Best
>
>
>
>
> Ioannis Koukoulis
>
> On 27 March 2016 at 00:22, Dimitry Andric <dimitry at andric.com> wrote:
>
>> Hi Ioannis,
>>
>> If you only want the clang static analyzer, there is no need to check out
>> and build libc++ as part of the process.  The rest of the build can just
>> use the system C++ library, which will be libstdc++ on Xubuntu.
>>
>> That said, without the full build log, it is hard to say what went
>> wrong.  Specifically, which references were undefined?
>>
>> -Dimitry
>>
>> > On 26 Mar 2016, at 16:04, Ioannis Koukoulis via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>> >
>> > Hello everybody,
>> >
>> > I am very new to llvm and I am struggling to install it on my 15.10
>> Xubuntu with kernel 4.2.0-34-generic #39-Ubuntu SMP x86_64 GNU/Linux.
>> >
>> > I essentially intend to use the clang static analyzer, but it seems
>> that I have to build it on top of llvm and clang.
>> >
>> > Unfortunately I run into the following problem.
>> > CXX shared library ../../../lib/libc++.so
>> > at around 52% of the procedure (while building target gtest_main)
>> > followed by a handful of undefined references
>> >
>> > the last lines consist of the following messages:
>> > collect2: error: ld returned 1 exit status
>> > projects/libcxx/lib/CMakeFiles/cxx.dir/build.make:735: recipe for
>> target 'lib/libc++.so.1.0' failed
>> > make[2]: *** [lib/libc++.so.1.0] Error 1
>> > CMakeFiles/Makefile2:11552: recipe for target
>> 'projects/libcxx/lib/CMakeFiles/cxx.dir/all' failed
>> > make[1]: *** [projects/libcxx/lib/CMakeFiles/cxx.dir/all] Error 2
>> > Makefile:136: recipe for target 'all' failed
>> > make: *** [all] Error 2
>> >
>> > Can someone please help me go further?
>> >
>> >
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > llvm-dev at lists.llvm.org
>> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
>
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