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

[Dimitry Andric via llvm-dev]

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 <mailto: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 <mailto: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 <mailto:llvm-dev at lists.llvm.org>
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
> 
> 

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