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

Ioannis Koukoulis via llvm-dev
Mon, 28 Mar 2016 22:08:33 -0000

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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