与 C 库的接口 Go [英] Interface Go with C libraries

问题描述

如何将 Go 程序与 C 库连接起来?

How does one interface a Go program with a C library?

我一直在浏览 Go 的源代码，但我仍然没有弄清楚.如果有人已经这样做了，可以分享一下吗?

I've been browsing Go's source code but I still didn't figured it out. If someone has already done so, could you share, please?

更新:感谢@fserb，我发布了一些来自 Go 来源的文档:

UPDATED: Thanks to @fserb, I am posting some documentation from the Go sources:

Cgo 使创建 Go 成为可能调用 C 代码的包.

Cgo enables the creation of Go packages that call C code.

用法:cgo [编译器选项] file.go

Usage: cgo [compiler options] file.go

编译器选项被传递通过在调用时未解释gcc 来编译 C 部分包.

The compiler options are passed through uninterpreted when invoking gcc to compile the C parts of the package.

输入 file.go 在语法上是一个导入的有效 Go 源文件伪包C"然后指类型如 C.size_t，变量如作为 C.stdout，或函数如C.putchar.

The input file.go is a syntactically valid Go source file that imports the pseudo-package "C" and then refers to types such as C.size_t, variables such as C.stdout, or functions such as C.putchar.

如果立即导入C"在评论之前，该评论是在编译 C 时用作头文件包裹的一部分.例如:

If the import of "C" is immediately preceded by a comment, that comment is used as a header when compiling the C parts of the package. For example:

// #include <stdio.h>
// #include <errno.h>
import "C"

Cgo 将输入文件转换为四个输出文件:两个 Go 源码文件，用于 6c(或 8c 或 5c)的 C 文件，和 gcc 的 C 文件.

Cgo transforms the input file into four output files: two Go source files, a C file for 6c (or 8c or 5c), and a C file for gcc.

标准包makefile规则在Make.pkg 自动化使用过程cgo.见 $GOROOT/misc/cgo/stdio 和$GOROOT/misc/cgo/gmp 示例.

The standard package makefile rules in Make.pkg automate the process of using cgo. See $GOROOT/misc/cgo/stdio and $GOROOT/misc/cgo/gmp for examples.

Cgo 还不能与 gccgo 一起使用.

Cgo does not yet work with gccgo.

推荐答案

检查 cgo.另外，请查看 Go 源代码中的 misc/cgo/gmp 以获取有关如何在 Go 中包装 C 库的示例代码.

Check cgo. Also, take a look at misc/cgo/gmp on the Go source code for an example code on how to wrap a C library in Go.

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