Why Does 'cc' Fail to Compile C Code on OS X Lion, and How Can I Fix It?

Error when Compiling Simple C Code on OS X Lion

When attempting to compile C code using "cc" on OS X Lion, an error may occur, resulting in undefined symbols for architecture x86_64. This error typically indicates that the linker is not using the C libraries during the compilation.

Solution

To resolve this issue, use the C compiler "g " or "clang " instead of "cc". These compilers understand and compile C code, and they include the necessary C libraries in the linking process.

Example

Replace the compilation command:

cc main.cpp

with:

g++ main.cpp

or:

clang++ main.cpp

Explanation

Using "cc" (the C compiler) without specifying options to use the C standard libraries can lead to errors during linking. The C compilers "g " and "clang " are specifically designed to handle C code and automatically include the required libraries.

By using "g " or "clang ", the compiler invocation involves the C link line that includes libstdc and other necessary libraries, resolving the undefined symbols error.

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