With the development of cloud computing, more and more applications need to run across platforms. Golang, as a strongly typed language, also performs well in this field. Cross-compilation is the process of compiling source code in one platform environment and running it on another platform. This article will introduce the cross-compilation process of Golang.
Cross-compilation process
First, you need to download the cross-compilation tool chain. On the official website of Golang, we can find the download link corresponding to the platform, as shown in the figure below:
After selecting the corresponding operating system, CPU architecture and version, add it Unzip to any directory.
Next, you need to set environment variables in the terminal so that Golang can find the correct tool chain when compiling. Taking the macOS system as an example, enter the following command:
export GOROOT=/usr/local/go export GOOS=linux export GOARCH=amd64 export CGO_ENABLED=0 export GOBIN=$GOROOT/bin export PATH=$PATH:$GOBIN
Among them, GOROOT
represents the installation path of Golang, GOOS
represents the target operating system, and GOARCH
represents the target CPU architecture, CGO_ENABLED
represents whether to enable Cgo, GOBIN
represents the compiled executable file path, PATH
is used for setting in Unix/Linux systems System variables for environment variables.
Next, write or download the Golang program code to be cross-compiled and save it as a .go
file. For example, the following code uses Golang to implement a simple Hello World program:
package main import "fmt" func main() { fmt.Println("Hello, World!") }
Then, use the following command to compile the code into an executable file:
$ go build -v -o hello
Where, -v# The ## parameter indicates the output details, and the
-o parameter specifies the name of the executable file generated by compilation. In the above command,
hello specifies the name of the generated executable file, which can also be replaced by other names.
$ GOOS=linux GOARCH=arm GOARM=5 go build -v -o hello-arm5
GOOS specifies the target operating system as Linux,
GOARCH specifies the target CPU architecture as ARM,
GOARM Specify the ARM version, here it is specified as 5. This line of command will generate a binary file named
hello-arm5 in the current directory.
library, you need to use specific system calls such as
windows,
linux,
darwin, etc. for the target operating system. interface.
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