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When I build main with dynamic link to boost log. I get

dyld: Library not loaded: libboost_filesystem.dylib
  Referenced from: /Users/arthuranderson/Documents/work/edx/algo/cmake-build-debug/algo_main
  Reason: image not found. 

I am expecting main to build and run.

Environment:

OS: OSX 10.14.2
XCode: 10.1

algo/
  cmake/
    CMakeList.Boost.txt.in
  src/
    main.cpp
  test/
    versionUnitTests.cpp

  CMakeLists.txt

Boost is brought in using ExternalProject_add.

It downloads, extracts and builds all the libs needed. They show up correctly in the CMakeCache.txt. The build and download happens in the CMAKE_CURRENT_BINARY_DIR The libraries are located in CMAKE_CURRENT_BINARY_DIR/boost/lib

CMakelist.Boost.txt.in contents are...

cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
#---------------------------------------------------------------------------
# Get and build boost
include(ExternalProject)
message("----- building boost ----")
message( ${CMAKE_BUILD_TYPE})

ExternalProject_Add(Boost
        URL https://dl.bintray.com/boostorg/release/1.70.0/source/boost_1_70_0.tar.bz2
        URL_HASH SHA256=430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778
        PREFIX ${CMAKE_CURRENT_BINARY_DIR}/boost
        UPDATE_COMMAND ""
        LOG_DIR ${CMAKE_CURRENT_BINARY_DIR}/boost-log
        DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/boost-download
        SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/boost-src
        BUILD_IN_SOURCE 1
        CONFIGURE_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/boost-src/bootstrap.sh --prefix=${CMAKE_CURRENT_BINARY_DIR}/boost
        BUILD_COMMAND ./b2 install variant=debug -j8 link=shared --with-filesystem --with-system --with-date_time --with-thread --with-regex --with-log
        INSTALL_COMMAND ""
        TEST_COMMAND ""
        LOG_DOWNLOAD 1
        LOG_CONFIGURE 1
        LOG_BUILD 1
        LOG_INSTALL 1
        LOG_LOG_MERGED_STDOUTERR 1
        )

The CMakeLists.txt that uses this in configure_file

cmake_minimum_required(VERSION 3.14 FATAL_ERROR)

cmake_policy(SET CMP0048 NEW)
project(algo_main VERSION 0.1.1 )

set(CMAKE_CXX_STANDARD 14)

# Boost
set(Boost_DEBUG 1)
configure_file(cmake/CMakeList.Boost.txt.in boost-download/CMakeLists.txt)
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
        RESULT_VARIABLE result
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/boost-download)
if (result)
    message(FATAL_ERROR "CMake step for googletest failed: ${result}")
endif ()
execute_process(COMMAND ${CMAKE_COMMAND} --build .
        RESULT_VARIABLE result
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/boost-download)
if (result)
    message(FATAL_ERROR "Build step for boost failed: ${result}")
endif ()
set(BOOST_ROOT ${CMAKE_CURRENT_BINARY_DIR}/boost )
find_package(Boost 1.70.0 EXACT REQUIRED COMPONENTS filesystem system date_time thread regex log)


# VERSION
configure_file(src/version/version_defs.h.in generated/version_defs.h @ONLY)

add_executable(algo_main
        src/main.cpp src/version/Version.cpp src/util/Logger.cpp src/util/Logger.h)
target_include_directories(algo_main
        PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/generated )
if( Boost_FOUND )
    target_include_directories(algo_main
            PRIVATE ${Boost_INCLUDE_DIR})
    target_link_libraries(algo_main ${Boost_LIBRARIES})
    target_link_directories(algo_main
            PRIVATE ${Boost_LIBRARY_DIR})
endif( Boost_FOUND )

I think this maybe related to another post, where they found that xcode could not find libraries that were not installed in the global location. Any suggestions could help. I would rather stay away from installing in /usr/local/bin and keep the libraries local to the project.

Thanks Arthur