when i compile an iOS project with using the three part library, i got "Apple Mach-O linker Error"

Question

I've added a library named "*.a" from three part and added its header file in my XCode project. While I compile the project, there are many "Apple Mach-O linker Error". Here the error info:

"std::ios_base::failure::~failure()", referenced from:

  "std::_List_node_base::unhook()", referenced from:

  "std::string::find(char const*, unsigned long, unsigned long) const", referenced from:

  "std::ios_base::failure::failure(std::string const&)", referenced from:

  "std::_List_node_base::hook(std::_List_node_base*)", referenced from:

  "std::invalid_argument::invalid_argument(std::string const&)", referenced from:

  "std::runtime_error::runtime_error(std::string const&)", referenced from:

  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(unsigned long, char, std::allocator<char> const&)", referenced from:

  "std::string::assign(char const*, unsigned long)", referenced from:

  "std::istream::operator>>(int&)", referenced from:

  "vtable for std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >", referenced from:

  "vtable for std::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >", referenced from:

  "std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::basic_ostringstream(std::_Ios_Openmode)", referenced from:

  "vtable for std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >", referenced from:

  "std::string::_Rep::_M_destroy(std::allocator<char> const&)", referenced from:

  "std::ios_base::Init::Init()", referenced from:

  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)", referenced from:

  "std::ostream& std::ostream::_M_insert<double>(double)", referenced from:

  "std::string::append(unsigned long, char)", referenced from:

  "std::string::_M_leak_hard()", referenced from:

  "std::_Rb_tree_decrement(std::_Rb_tree_node_base*)", referenced from:

  "std::string::find(char, unsigned long) const", referenced from:

  "std::string::find_last_not_of(char const*, unsigned long, unsigned long) const", referenced from:

  "std::string::replace(unsigned long, unsigned long, char const*, unsigned long)", referenced from:

  "std::string::reserve(unsigned long)", referenced from:

  "std::string::_M_mutate(unsigned long, unsigned long, unsigned long)", referenced from:

  "VTT for std::basic_ifstream<char, std::char_traits<char> >", referenced from:

  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:

  "non-virtual thunk to std::basic_istream<char, std::char_traits<char> >::~basic_istream()", referenced from:

  "std::string::_Rep::_S_terminal", referenced from:

  "std::string::_Rep::_S_max_size", referenced from:

  "std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&)", referenced from:

  "std::string::_M_replace_safe(unsigned long, unsigned long, char const*, unsigned long)", referenced from:

  "std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&)", referenced from:

  "std::__throw_length_error(char const*)", referenced from:

  "std::string::append(char const*, unsigned long)", referenced from:

  "std::basic_istream<char, std::char_traits<char> >::~basic_istream()", referenced from:

  "std::string::compare(char const*) const", referenced from:

  "std::basic_filebuf<char, std::char_traits<char> >::open(char const*, std::_Ios_Openmode)", referenced from:

  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&, unsigned long, unsigned long)", referenced from:

  "std::basic_filebuf<char, std::char_traits<char> >::close()", referenced from:

  "std::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >::basic_istringstream(std::string const&, std::_Ios_Openmode)", referenced from:

  "std::ios_base::Init::~Init()", referenced from:

  "vtable for std::basic_streambuf<char, std::char_traits<char> >", referenced from:

  "std::ios_base::~ios_base()", referenced from:

  "std::_Rb_tree_increment(std::_Rb_tree_node_base const*)", referenced from:

  "std::ostream::operator<<(int)", referenced from:

  "std::_Rb_tree_increment(std::_Rb_tree_node_base*)", referenced from:

  "std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::str() const", referenced from:

  "std::istream& std::istream::_M_extract<float>(float&)", referenced from:

  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:

  "std::string::append(std::string const&)", referenced from:

  "std::string::find_first_of(char const*, unsigned long, unsigned long) const", referenced from:

  "std::__throw_out_of_range(char const*)", referenced from:

  "std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream()", referenced from:

  "std::basic_ios<char, std::char_traits<char> >::clear(std::_Ios_Iostate)", referenced from:

  "std::locale::~locale()", referenced from:

  "std::string::_Rep::_S_empty_rep_storage", referenced from:

  "std::string::find_first_not_of(char const*, unsigned long, unsigned long) const", referenced from:

  "std::string::assign(std::string const&)", referenced from:

  "std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()", referenced from:

clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any one help me to fix this issue. Thanks!

Electrokinetics

Answer 1

Looks like the library uses C++. Try adding libstdc++ to your target.

Tedesco

I've add libstdc++ to my target, but this does not make sense. I don't know how to fix this issue. – Electrokinetics

Try to add libstdc++.6 instead – Jaella

Ran into the same issue when trying to build with the Red Laser SDK from eBay. The instructions from their own READ ME doc didn't help but this link did. Thx – Austria

Answer 2

Thanks it helped me to repair my project, during switching from SDK 6 to SDK 8 had the same errors.

With adding libstdc++6 i could solve my problem.

Acrospire

Answer 3

Try changing the C++ Standard Library from Compiler Default to libstdc++ (GNU C++ standard library) in the Target --- > Build Settings --> C++ standard library

This solved my problem .

Nicholle

Answer 4

The answer from @Phillip Mills was great hint to solve many errors but instead of that to terminate all errors I changed C++ Standard Library settings under Apple LLVM 8.0 - Language - C++ to libstdc++ as shown in the screenshot. I have safely removed the libstdc++ library from the target.

Yearly