error LNK2005: already defined – C++

by

You either have to

  • move SetPersonName‘s definition to a .cpp file, compile and link to the resulting target
  • make SetPersonName inline

This is a well known case of One Definition Rule violation.

The static keyword makes the function’s linkage internal i.e. only available to the translation unit it is included in. This however is hiding the real problem. I’d suggest move the definition of the function to its own implementation file but keep the declaration in the header.

More Related Contents:

  1. What happens to global and static variables in a shared library when it is dynamically linked?
  2. g++ undefined reference to typeinfo
  3. GCC C++ Linker errors: Undefined reference to ‘vtable for XXX’, Undefined reference to ‘ClassName::ClassName()’
  4. Is it safe to link C++17, C++14, and C++11 objects
  5. What is __gxx_personality_v0 for?
  6. error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup
  7. Altering DLL search path for static linked DLL
  8. How can I statically link standard library to my C++ program?
  9. g++ linking order dependency when linking c code to c++ code
  10. Linking a shared library with another shared lib in linux
  11. How to specify preference of library path?
  12. Compilation fails with “relocation R_X86_64_32 against `.rodata.str1.8′ can not be used when making a shared object”
  13. Where do object file “Version References” come from?
  14. error LNK2038: mismatch detected for ‘_ITERATOR_DEBUG_LEVEL’: value ‘0’ doesn’t match value ‘2’ in main.obj
  15. Libraries in /usr/local/lib not found
  16. Linking Libraries in Xcode
  17. Unresolved external symbol LNK2019
  18. How to use OpenSSL with GCC?
  19. When should I write the keyword ‘static’ before a non-member function?
  20. C++ template, linking error [duplicate]
  21. Replacing ld with gold – any experience?
  22. error LNK2005: xxx already defined in MSVCRT.lib(MSVCR100.dll) C:\something\LIBCMT.lib(setlocal.obj)
  23. Undefined reference to `stdscr’ while using ncurses
  24. library is linked but reference is undefined
  25. What does exactly the warning mean about hidden symbol being referenced by DSO?
  26. Using a static library in Qt Creator
  27. Linking C++ code with ‘gcc’ (without g++)
  28. How to force inclusion of an object file in a static library when linking into executable?
  29. Undefined symbols for architecture x86_64 – Mavericks (Yosemite, El Capitan…)
  30. How to Embed/Link binary data into a Windows module

Leave a Comment