Call c-static-lib in Go

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Here is a quick start for call c-static-lib in Go on Windows(MinGW)/Linux.

How to compile and call a C-static lib in Golang

touch some files first

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# create a directory for this project
mkdir -p ./hi/lib; cd ./hi
touch ./main.go ./lib/hi.h ./lib/hi.c

Create a header file: hi.h

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#ifndef HI_H
#define HI_H

void print_hi();

#endif // HI_H

Create a source file: hi.c

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#include <stdio.h>

void print_hi() {
    printf("hi, from C\n");
}

Create a main file: main.go

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package main

/*
#cgo CFLAGS: -I ${SRCDIR}/lib
#cgo LDFLAGS: -L ${SRCDIR}/lib -l hi
#include "hi.h"
*/
import "C"

func main() {
	C.print_hi()
}

Compile the source file into a static library

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gcc -c ./lib/hi.c -o ./lib/hi.o
ar rcs ./lib/libhi.a ./lib/hi.o

Run

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# go run directly
go run main.go

# or build and run
go build -o bin/hi main.go && ./bin/hi

FYI

Source Code