How to Integrate Go Functions into an Existing C Project using GCCGO?

Using Go in an Existing C Project

You aim to integrate Go functions into a C program by creating an object file from a Go source file and including it in an existing C project. However, you encounter linking errors despite using GCCGO.

To address this issue, as suggested by the solution, consider the following approach:

For Go 1.5 and later, use the -buildmode flag to create C-compatible libraries:

• Static library:

  go build -buildmode c-archive -o mygopkg.a

• Shared library:

  go build -buildmode c-shared -o mygopkg.so

Once you have the C-compatible library, you can integrate it into your C project:

• Static library:

  gcc -o main _main.c mygopkg.a -lpthread

• Shared library:

  export LD_RUN_PATH=$(pwd)
  gcc -o main _main.c mygopkg.so -lpthread

Note that LD_RUN_PATH ensures that the linker finds the shared library in the current directory.

Using this approach, you can create C-compatible libraries in Go and seamlessly integrate them into existing C projects, allowing you to call Go functions from within your C program.

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