Re: [Boost-users] g++ linking error with lboost_program_options

27 Jul 2021

      Yes, that's it, if I launch the program from the terminal it works correctly but if I launch it from Visual Studio Code I get the error described. In task.json I use:

{
        "label": "Run Project",
        "type": "shell",
        "command": "./Chapter01/01_A_program_options_base/main --apples=60 --oranges=20",
        "group": {
          "kind": "build",
          "isDefault": true
        },
        "problemMatcher": []
      }

visual studio code ignores the environment variable DYLD_LIBRARY_PATH or DYLD_FALLBACK_LIBRARY_PATH.
If i run the program from the terminal integrated in visual studio code i get the correct result.
Does anyone know how to set the path for libraries in non-standard path in visual studio code?

Thanks 
Stefano
...
Il giorno 27 lug 2021, alle ore 10:00, Klebsch, Mario via Boost-users  ha scritto:
Hello,
...
export DYLD_LIBRARY_PATH=/usr/local/boost-1.76.0_gcc-11_libs/lib:$DYLD_LIBRARY_PATH
and at runtime I get:
dyld: Symbol not found: __ZN5boost15program_options3argB5cxx11E
  Referenced from: /Users/stegra/Projects/VSCode/BoostCookbook/./Chapter01/01_A_program_options_base/main
  Expected in: /usr/local/lib/libboost_program_options.dylib
 in /Users/stegra/Projects/VSCode/BoostCookbook/./Chapter01/01_A_program_options_base/main
It seems, that libboost_program_options.dylib is piced from /usr/local/lib  instead of =/usr/local/boost-1.76.0_gcc-11_libs/lib.
Macos is different from linux in finding dynamic libraries. The most important difference is, that in macos, shared libraries usually are referred by absolute path. You can see this, when doing otool -l on an execuatable.
You can use install_name_tool to change the path of the shared objects referenced within an executable or shared object.
Klebsch Mario
Funktion | R&D
Tel: +49 (0) 531 38 701 718
Raum: Braunschweig, E20
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Re: [Boost-users] g++ linking error with lboost_program_options

Stefano Gragnani