Changing the BOOST_URL leads to linking error

[Weiming-Hu]

Due to the recurrent issue #88, I'm trying to use an alternative BOOST_URL from ``.

But after I changed the URL and recompile my code, the following linking errors appear:

"boost::filesystem::emit_error(int, boost::system::error_code*, char const*)", referenced from:
      boost::filesystem::error(int, boost::system::error_code*, char const*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::emit_error(int, boost::filesystem::path const&, boost::system::error_code*, char const*)", referenced from:
      boost::filesystem::error(int, boost::filesystem::path const&, boost::system::error_code*, char const*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::emit_error(int, boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*, char const*)", referenced from:
      boost::filesystem::error(int, boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*, char const*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::filesystem_error::filesystem_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::system::error_code)", referenced from:
      boost::filesystem::detail::current_path(boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::filesystem_error::filesystem_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::filesystem::path const&, boost::system::error_code)", referenced from:
      boost::filesystem::detail::canonical(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::symlink_status(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::read_symlink(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directories(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directory(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::permissions(boost::filesystem::path const&, boost::filesystem::perms, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::status(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      ...
  "boost::filesystem::filesystem_error::filesystem_error(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code)", referenced from:
      boost::filesystem::detail::copy(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::filesystem_error::~filesystem_error()", referenced from:
      boost::filesystem::detail::canonical(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::symlink_status(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::read_symlink(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::copy(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directories(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directory(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::current_path(boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      ...
  "boost::filesystem::detail::dir_itr_close(void*&, void*&)", referenced from:
      boost::filesystem::detail::dir_itr_imp::~dir_itr_imp() in libAnEnIO.a(FunctionsIO.cpp.o)
      boost::filesystem::detail::dir_itr_imp::~dir_itr_imp() in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::detail::directory_iterator_construct(boost::filesystem::directory_iterator&, boost::filesystem::path const&, unsigned int, boost::system::error_code*)", referenced from:
      boost::filesystem::directory_iterator::directory_iterator(boost::filesystem::path const&, boost::filesystem::directory_options) in libAnEnIO.a(FunctionsIO.cpp.o)
      boost::filesystem::directory_iterator::directory_iterator(boost::filesystem::path const&, boost::system::error_code&) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::directory_iterator::directory_iterator(boost::filesystem::path const&, boost::filesystem::directory_options::enum_type) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::detail::directory_iterator_increment(boost::filesystem::directory_iterator&, boost::system::error_code*)", referenced from:
      boost::filesystem::directory_iterator::increment() in libAnEnIO.a(FunctionsIO.cpp.o)
      boost::filesystem::detail::(anonymous namespace)::remove_all_aux(boost::filesystem::path const&, boost::filesystem::file_type, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
  "boost::filesystem::directory_entry::get_status(boost::system::error_code*) const", referenced from:
      boost::filesystem::directory_entry::status() const in libAnEnIO.a(FunctionsIO.cpp.o)
  "typeinfo for boost::filesystem::filesystem_error", referenced from:
      boost::filesystem::detail::canonical(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::symlink_status(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::read_symlink(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::copy(boost::filesystem::path const&, boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directories(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::create_directory(boost::filesystem::path const&, boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)
      boost::filesystem::detail::current_path(boost::system::error_code*) in libboost_filesystem.a(operations.cpp.o)

This is how I'm using this module. You won't see the code where I change BOOST_URL because that is still local. Everything was working well when I don't change the URL (well, as for now, since the Boost mirror is down, the downloading won't go through).

• package 1
• package 2

Please advice. Thank you.

[Weiming-Hu]

I'm not sure whether this helps. I looked inside the boost-cmake build folder to see what are available. I found the following. AnalogEnsemble is my github project.

$ pwd
/Users/wuh20/github/AnalogsEnsemble/build/build/boost-cmake
$ ls
CMakeFiles                 Makefile                   libboost_date_time.a       libboost_filesystem.a      libboost_program_options.a libboost_serialization.a

Thank you

[Weiming-Hu]

My development environment is as follows:

• OS: Mac OS Mojave Version 10.14.6
• Model: MacBook Air (13-inch, Early 2015)
• CMake version: 3.15.5
• Compiler: Apple clang version 11.0.0 (clang-1100.0.33.17)

[Weiming-Hu]

I just tried a different version https://cfhcable.dl.sourceforge.net/project/boost/boost/1.70.0/boost_1_70_0.tar.bz2 with 430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778.

The error is different. I guess it might be a version problem.

Undefined symbols for architecture x86_64:
  "boost::filesystem::detail::directory_iterator_construct(boost::filesystem::directory_iterator&, boost::filesystem::path const&, unsigned int, boost::system::error_code*)", referenced from:
      boost::filesystem::directory_iterator::directory_iterator(boost::filesystem::path const&, boost::filesystem::directory_options) in libAnEnIO.a(FunctionsIO.cpp.o)
  "boost::filesystem::directory_entry::get_status(boost::system::error_code*) const", referenced from:
      boost::filesystem::directory_entry::status() const in libAnEnIO.a(FunctionsIO.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)