如何检查golang二进制文件是否用

Disclaimer first: I'm no expert of compilation toolchains and executable file formats. I'll try not to say stupid things, but correct me if you see any mistake !

I ran those tests on an ArchLinux laptop, with x86_64 architecture. Go version is 1.8.1.

First, we need to know where those flags are actually used:

$ go help build
...
-ldflags 'flag list'
    arguments to pass on each go tool link invocation
...

go tool link

$ go tool link
...
-s  disable symbol table
...
-w  disable DWARF generation
...

Taken from the short introduction to ELF that I found here, here is the header text concerning the Symbol Table:

An object file’s symbol table holds information needed to locate and relocate a program’s symbolic definitions and references.

As for DWARF, this is a format for debugging data.

-ldflags='-s'-ldflags='-w'

.symtab.debug_info

readelfnm

debug/elf

package main

import "fmt"
import "os"
import "debug/elf"

func main() {
    fileName := "path/to/main"
    fp, err := elf.Open(fileName)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    symtab := fp.Section(".symtab")
    if symtab == nil {
        fmt.Println("No Symbol Table : compiled with -ldflags='-s'")
    }

    debugInfo := fp.Section(".debug_info")
    if debugInfo == nil {
        fmt.Println("No DWARF data : compiled with -ldflags='-w'")
    }
}

-s-w-s -w-s

debug/pe