Why Am I Getting the \'Undefined Symbol ___gxx_personality_v0\' Error When Building C Code?

Linking Errors with "Undefined Symbol ___gxx_personality_v0"

When building C code with the gcc compiler, you may encounter an error stating "Undefined symbol ___gxx_personality_v0." This typically indicates that you're using the incorrect compiler for your code's language.

The default behavior of gcc is to compile C code. For C code, you should use the g compiler instead. Simply replace gcc with g in your build command:

g++ test.cpp

If you still receive the error after switching to g , you can try adding the -lstdc flag to your build command. This flag links the Standard C Library (STL) which provides the necessary symbols for C code:

gcc test.cpp -lstdc++

Note that using -lstdc is not typically necessary when using g , as it automatically links the STL by default. However, in some cases, it may be required if your system's configuration is missing the appropriate libraries.

As mentioned in the solution, both methods (using g or gcc with -lstdc ) produce the same executable, as verified by comparing their MD5 hashes. However, using g is the recommended approach for C code as it simplifies the build process.

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