How to Resolve Linker Errors When Converting `std::__cxx11::string` to `std::string`?

Converting std::__cxx11::string to std::string: A Linker Error Resolution

Despite the prevalence of C 11, certain libraries remain incompatible with its features. One such challenge arises when attempting to convert from a std::__cxx11::string to a standard std::string.

This incompatibility manifests in linker errors, such as "undefined reference to `H5::CompType::insertMember." These errors often occur when linking object files compiled with different values for the _GLIBCXX_USE_CXX11_ABI macro.

Solution: Recompiling with the Legacy ABI

If recompiling the third-party library with C 11 support is not an option, users can resolve the issue by recompiling their code with the legacy ABI. This involves defining the following macro before including any standard library headers:

#define _GLIBCXX_USE_CXX11_ABI 0

By setting this macro, the code is forcibly compiled with the older ABI, ensuring compatibility with the third-party library. This approach effectively patches the linker error and allows the code to operate seamlessly.

Note:

It is crucial to define this macro before including any standard library headers. Otherwise, the compilation process may default to the C 11 ABI, rendering the fix ineffective.

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