Why Does My C Code Produce Undefined Symbol Errors, and How Can I Fix Them?

Errors in Compiling C Code

The provided C code fails to compile, resulting in numerous undefined symbol errors. These errors indicate that the compiler is unable to locate the C standard libraries required for successful compilation.

Resolution

To resolve the issue, it's essential to use the correct compiler that supports C and its standard libraries. Instead of using "cc," which is the C compiler, one should use "g " or "clang " to compile C code.

Example

Using "g " to compile the given code:

clang Example

Using "clang " to compile:

Correct Linker Invocation

When invoking the linker, it's crucial to ensure that it is linked against the proper libraries. The correct link line, using "clang ," looks like:

Note the inclusion of "/usr/lib/libstdc .6.dylib," which provides the necessary C standard library implementation.

By using the appropriate compiler and ensuring the correct linker invocation, the C code should compile successfully without encountering undefined symbol errors.

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