Question

Why do I keep getting this issue duplicate symbol for architecture arm64 on my Xcode when I try to run a C++ code on my MacOS?

Answer 1

The 'duplicate symbol for architecture arm64' error occurs due to multiple definitions of the same function or variable in a project. Resolving it requires checking for duplicate inclusions, ensuring proper use of 'extern' for global variables, and reviewing build settings to avoid compiling or linking files more than once.

Step-by-step explanation:

When encountering a duplicate symbol for architecture arm64 error in Xcode while running C++ code, it suggests that there are multiple definitions of the same function or variable being compiled for the ARM64 architecture. This can happen due to various reasons such as:

• Linking the same object file or library multiple times.
• Having multiple implementations of the same function or variable.
• Improperly configured build settings leading to the same file being included more than once.

To resolve this issue, you should:

1. Check for any duplicate file inclusions in your project and remove them.
2. Ensure that all global variables are declared as extern in header files and are defined in precisely one .cpp file.
3. Review your build settings to make sure that files are not being compiled and linked more than once.

This should help you get rid of the duplicate symbol error and run your C++ code successfully.