How to Resolve Linker Errors Caused by std::__cxx11::string and std::string Conversion Inconsistencies?

Resolving Linker Errors for std::__cxx11::string Conversion

Developers working with C 11 libraries that are not configured for it may encounter linker errors related to the conversion between std::__cxx11::string and std::string. Despite attempts to cast, this conversion remains unsuccessful.

Further investigation reveals a potential issue with GCC 5. According to the GCC 5 Release Notes, such linker errors can indicate the use of object files compiled with different _GLIBCXX_USE_CXX11_ABI macro values. This often occurs when linking to a third-party library compiled with an earlier GCC version.

To resolve this issue, the developer can redefine the _GLIBCXX_USE_CXX11_ABI macro to 0 before including any standard library headers. This should fix the linker errors:

#define _GLIBCXX_USE_CXX11_ABI 0

#include <standard_library_headers.h>

By following this approach, developers can successfully convert between std::__cxx11::string and std::string, even when using libraries that are not C 11 compliant.

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