[Openmp-dev] Build error with Debug Clang

[Alexey Bataev via Openmp-dev]

There is a problem with libstdc++. Seems to me, libomptarget.so was build by a newer compiler with new libstdc++, but the clang itself uses and links against old libstdc++.

Best regards,
Alexey Bataev

> 29 окт. 2019 г., в 19:58, Itaru Kitayama via Openmp-dev <openmp-dev at lists.llvm.org> написал(а):
> 
> 
> Hi,
> a C++ code like:
> #include <iostream>
> int main() {}
> 
> fails to build with a Debug Clang which was configured with CMake
> with LIBOMPTARGET_ENABLE_DEBUG is set.
>  
> $ clang++ -g -std=c++11 -fopenmp -fopenmp-targnvptx64 t1.cpp
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned long&, unsigned long)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_dispose()@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(char const*)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_capacity(unsigned long)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_data() const at GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::c_str() const at GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_S_copy_chars(char*, char*, char*)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_data(char*)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_local_data()@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_set_length(unsigned long)@GLIBCXX_3.4.21'
> /p/scratch/cpcp0/pcp0151/opt/clang/201910292307/bin/../lib/libomptarget.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider::_Alloc_hider(char*, std::allocator<char> const&)@GLIBCXX_3.4.21'
> clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
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