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Let's talk about the usage of golang compiler

PHPz

Mar 30, 2023 am 09:07 AM

Go language is a compiled programming language with its own compiler and tool chain. The Golang compiler is a command line tool developed in the Go language. It is used to compile Go code into executable files or library files, which can then be run on different system platforms or called in other programming languages.

This article will introduce the usage of the Golang compiler, including how to use the Golang compiler to compile Go language source code, how to set compilation options, how to generate C code and use a cross-compiler.

Compile Go code

It is very simple to use the Golang compiler to compile Go code. Just use the command "go build" plus the name of the Go source code file that needs to be compiled. Can. For example, to compile a Go source code file named "example.go", you can use the following command:

go build example.go

This will generate an executable file named "example", which can be directly in the current directory implement. The "go build" command also supports the following options, such as:

-o: Specify the output file name;
-i: Install dependent packages;
-gcflags: Set compiler parameters;
-ldflags: Set connector options.

For example, use the following command to install all dependent packages, and the output file name is "myapp":

go build -i -o myapp example.go

Set compilation options

The Golang compiler supports many compilation parameters and environment variables to control the compilation process. Two common compilation options and their usage are introduced below:

GOARCH: used to set the CPU type of the target platform;
GOOS: used to set the operating system type of the target platform.

For example, if you want to compile the executable file of ARM CPU under Linux platform, you can use the following command:

GOOS=linux GOARCH=arm go build example.go

This command will generate an executable file named "example" ARM CPU executable file running under Linux platform.

C code generation

In addition to generating executable files and library files, the Golang compiler also supports compiling Go code into C language code, and then using GCC, etc. C language compiler compiles. This is very useful in some special scenarios, such as running on some embedded development platforms.

Use the following command to generate C language code:

go tool cgo -godefs example.go > example_cgo.go

This command will generate a C language code file named "example_cgo.go", which contains the data type conversion of the Go language Definition and implementation of C language data types.

Cross-compilation

Cross-compilation refers to compiling the source code on one platform and then running it on another platform. In Golang programming, cross-compiling is very easy, just use the GOOS and GOARCH options to specify the target platform.

For example, to compile an executable file that can run under Linux under the Mac OS X platform, you can use the following command:

GOOS=linux GOARCH=amd64 go build example.go

This command will generate an executable file named "example" An executable file that can run on the Linux platform.

Summary

This article introduces the use of the Golang compiler, including how to use the Golang compiler to compile Go language source code, how to set compilation options, how to generate C code and use a cross-compiler. By mastering these skills, you can better use the Golang compiler to develop and run the Go language.

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