Undefined symbols "boost::system::detail::generic_category_instance"

I'm on macOS 10.14.1 with boost 1.68.0

I built boost from source to try and see whether vcpkg was the source of the problem in my build (I submitted an issue to vcpkg for this.) I'm getting this when I link:

  "boost::system::detail::generic_category_instance", referenced from:
      boost::system::generic_category() in log.cpp.o

Here's the build configuration in my cmake project, I'm also building for c++17:

ExternalProject_Add(
  Boost
  PREFIX "${CMAKE_BINARY_DIR}/extern"
  GIT_REPOSITORY "https://github.com/boostorg/boost.git"
  GIT_TAG "boost-1.68.0"
  GIT_SHALLOW TRUE
  GIT_PROGRESS TRUE
  BUILD_IN_SOURCE TRUE
  CONFIGURE_COMMAND 
    <SOURCE_DIR>/bootstrap.sh
      --with-libraries=filesystem
      --with-libraries=log
      --with-libraries=locale
      --with-libraries=system
      --with-libraries=thread
      --prefix=<SOURCE_DIR>
  BUILD_COMMAND <SOURCE_DIR>/b2 install link=static variant=release threading=multi runtime-link=static
  INSTALL_COMMAND ""
)

I get the same error building 1.67.0, what am I doing wrong here?

[pdimov]

Try building Boost for C++14 or C++17 (I'm not sure what the default is for macOS 10, but it's typically C++03 for Clang.) To do that, add cxxstd=14 or cxxstd=17 to the b2 command line in BUILD_COMMAND.

You can also try GIT_TAG master or GIT_TAG boost-1.69.0-beta1 for the upcoming 1.69.0, in which Boost.System is header-only, which should sidestep this issue. But in general it's a good practice to build Boost for the same C++ standard you would be using to link to it.

I added cxxstd=17 and it started linking, thanks for the help! I'll go ahead and close this because you've got a fix coming in the next version.