Undefined reference to library function

[roelofd]

So I have created a very basic "hello world" kind of project which uses the LLA library. I exactly followed all the build and install tutorials, and now started with the C++ how to. For some reason while trying to compile it gives an "undefined reference" error when a library function is called even though the function does exist in that location. I can't seem to find any useful information. Seems to be a linker issue but how do I fix this?

main.cpp

#include <iostream>

#include <logicalaccess/dynlibrary/librarymanager.hpp>
#include <logicalaccess/readerproviders/readerconfiguration.hpp>
#include <logicalaccess/cards/chip.hpp>

int main()
{
    std::cout << "Program started\n";
    
    // Reader configuration object to store reader provider and reader unit selection.
    std::shared_ptr<logicalaccess::ReaderConfiguration> readerConfig(new logicalaccess::ReaderConfiguration());
           
    // Set PCSC ReaderProvider by calling the Library Manager which will load the function from the    corresponding plug-in
    readerConfig->setReaderProvider(logicalaccess::LibraryManager::getInstance()->getReaderProvider(str));
    std::cout << "after..\n";
}

Build output
Building project.. [100%] Linking CXX executable bin/project CMakeFiles/project.dir/main.cpp.o: In function 'main': main.cpp:(.text+0x1ae): undefined reference to 'logicalaccess::LibraryManager::getReaderProvider(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' collect2: error: ld returned 1 exit status CMakeFiles/project.dir/build.make:191: recipe for target 'bin/project' failed make[2]: *** [bin/project] Error 1 CMakeFiles/Makefile2:95: recipe for target 'CMakeFiles/project.dir/all' failed make[1]: *** [CMakeFiles/project.dir/all] Error 2 Makefile:103: recipe for target 'all' failed make: *** [all] Error 2

CmakeLists.txt

project(project)
cmake_minimum_required(VERSION 3.16)

include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup(TARGETS)
set(CMAKE_CXX_FLAGS "-I /usr/include/PCSC")
add_executable(project main.cpp)
target_link_libraries(project PUBLIC CONAN_PKG::LogicalAccess)

Any advice?

[roelofd]

I have fixed the issue. When conan is installed in the conan profile the compiler version should be changed to "compiler.libcxx=libstdc++11". This has to do with some compatibility issues with the conan compiler and cmake.