What is __gxx_personality_v0 for?

by

It is used in the stack unwiding tables, which you can see for instance in the assembly output of my answer to another question. As mentioned on that answer, its use is defined by the Itanium C++ ABI, where it is called the Personality Routine.

The reason it “works” by defining it as a global NULL void pointer is probably because nothing is throwing an exception. When something tries to throw an exception, then you will see it misbehave.

Of course, if nothing is using exceptions, you can disable them with -fno-exceptions (and if nothing is using RTTI, you can also add -fno-rtti). If you are using them, you have to (as other answers already noted) link with g++ instead of gcc, which will add -lstdc++ for you.

More Related Contents:

  1. Static variables initialisation order
  2. Compilation fails with “relocation R_X86_64_32 against `.rodata.str1.8′ can not be used when making a shared object”
  3. gcc: undefined reference to
  4. Where do object file “Version References” come from?
  5. How to link using GCC without -l nor hardcoding path for a library that does not follow the libNAME.so naming convention?
  6. How to use OpenSSL with GCC?
  7. Can I link a plain file into my executable? [duplicate]
  8. Can different GCC dialects be linked together?
  9. What does exactly the warning mean about hidden symbol being referenced by DSO?
  10. Linking C++ code with ‘gcc’ (without g++)
  11. Why does flowing off the end of a non-void function without returning a value not produce a compiler error?
  12. trap representation
  13. Embedding resources in executable using GCC
  14. C/C++ with GCC: Statically add resource files to executable/library
  15. GCC STL bound checking
  16. Difference between shared objects (.so), static libraries (.a), and DLL’s (.so)?
  17. Linking against older symbol version in a .so file
  18. undefined reference to `__stack_chk_fail’
  19. Update GCC on OSX
  20. How do you disable the unused variable warnings coming out of gcc in 3rd party code I do not wish to edit?
  21. error: use of deleted function
  22. Why is statically linking glibc discouraged?
  23. SetJmp/LongJmp: Why is this throwing a segfault?
  24. Range based for-loop on array passed to non-main function
  25. GCC C++ pow accuracy
  26. Throw in constexpr function
  27. Forcing or preventing use of a particular minor version of libstdc++
  28. Should std::unique_ptr be permitted
  29. What is the order of evaluation in a member initializer list?
  30. How do I use google mock in C?

Leave a Comment