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

Hi, you are right probably some gcc / clang mix was there, now i recompiled boost with gcc-11 and the linking errors are gone but now i get errors at runtime. ./bootstrap.sh --prefix=/usr/local/boost-1.76.0_gcc-11_libs In project-config.jam: #if ! clang in [ feature.values <toolset> ] #{ # using clang ; #} #project : default-build <toolset>clang ; using gcc : 11.1.0 : /usr/local/Cellar/gcc/11.1.0_1/bin/g++-11 ; and then: sudo ./b2 cxxflags=-std=gnu++20 install 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 Thanks Stefano

Il giorno 24 lug 2021, alle ore 12:33, John Maddock via Boost-users ha scritto:

On 23/07/2021 07:57, Stefano Gragnani via Boost-users wrote:

...

The development system is: MacBook Pro Intel i9 MacOS Big Sur 11.4 gcc version 11.1.0 (Homebrew GCC 11.1.0_1) clang version 12.0.0

I'm having trouble compiling some examples from the book 'Boost C ++ Application Development Cookbook’. The problem occurs *only* *with g ++,* *with clang there is no error.* Mistakes only occur when linking to -lboost_program_options, -lboost_system and -lboost_filesystem, with any other library (eg -lboost_chrono) everything is fine.

Did you compile the libraries with g++ or are they clang compiled? I would expect that mixing the 2 would cause issues.

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