在64位系统上编译32位二进制文​​件

Question

I've coded a Go program in a 64 bit system but I want to compile a 32 bit binary!

The 64 bit binary is working just great but I have no idea how to create a 32 bit binary.

How can I do it?

Answer 1

If you built your Go from source, then you can build any additional compilers and libraries for any CPU and OS. If you are on windows/amd64 and want to build for windows/386, then this will build everything you need to compile for windows/386:

set GOARCH=386  
cd %GOROOT%\src  
make.bat --no-clean  

Once you have done that, you can build your windows/386 executable with:

set GOARCH=386  
cd %YOUR_PROG_DIR%  
go build  

Since you are on windows/amd64, you should be able to even run / test your windows/386 programs too. Just make sure to set GOARCH=386 before you invoke any commands for windows/386.

One caveat: this does not support cgo, so you cannot use any packages that use cgo.