How can I interface Go programs with C libraries?

Interfacing Go Programs with C Libraries

Interfacing Go programs with C libraries requires a special tool called cgo. Cgo allows Go programs to call C code and use C data structures.

To interface a Go program with a C library:

1. Import the "C" package: Begin the Go source file with the line import "C".
2. Include C header files: If necessary, use comments before the "C" import to include C header files using directives like // #include .
3. Refer to C types, variables, and functions: Use the C. prefix to access C types, variables, and functions. For example, you can use C.size_t, C.stdout, or C.putchar.

For a practical example, refer to the misc/cgo/gmp code in the Go source code, which demonstrates how to wrap a C library in Go.

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