英文:
golang strip symbols with go build vs strip
问题
为什么在strip和go build -ldflags "-s -w"之间剥离符号的结果不同（参见这里）？以下是要翻译的代码部分：
$ go build -ldflags "-s -w" -o primes_no_symbols_from_go_build primes.go
$ go build -o primes primes.go && strip -s primes -o primes_no_symbols_from_strip
$ objdump -D primes_no_symbols_from_go_build > primes_no_symbols_from_go_build.human
$ objdump -D primes_no_symbols_from_strip > primes_no_symbols_from_strip.human
$ grep -rn "add" primes_no_symbols_from_go_build.human | wc -l
149568
$ grep -rn "add" primes_no_symbols_from_strip.human | wc -l
149556
是什么原因导致这些变化？（底层的Go程序可能与此无关，可以在这里找到）
英文:
Why does stripping symbols differ between strip and go build -ldflags "-s -w" (see here)?
$ go build -ldflags "-s -w" -o primes_no_symbols_from_go_build primes.go
$ go build -o primes primes.go && strip -s primes -o primes_no_symbols_from_strip
$ objdump -D primes_no_symbols_from_go_build > primes_no_symbols_from_go_build.human
$ objdump -D primes_no_symbols_from_strip > primes_no_symbols_from_strip.human
$ grep -rn "add" primes_no_symbols_from_go_build.human | wc -l
149568
$ grep -rn "add" primes_no_symbols_from_strip.human | wc -l
149556
what can account for these changes? (the underlying go program, probably irrelevant, is from here).
答案1
得分: 1
strip和ld工具是特定于操作系统的，来自于man strip的说明：
当在可执行文件上使用strip命令时，如果文件使用动态链接编辑器，strip会检查该文件。如果使用了动态链接编辑器，strip命令的效果与使用-u和-r选项相同。如果文件不使用动态链接编辑器，则strip没有任何选项的效果与使用ld(1)的-s选项相同。选项-S、-x和-X具有与ld(1)选项相同的效果。strip(1)的选项可以组合使用，以将符号表修剪为所需的内容。
即大多数ld没有-w选项，这意味着在OSX上“抑制所有警告消息”。
在Linux/Debian上：
1187840 Jul 7 09:05 primes_no_symbols_from_go_build_s
1187840 Jul 7 09:05 primes_no_symbols_from_go_build_s_w
1755360 Jul 7 09:05 primes_simple_go_build
1187004 Jul 7 09:06 primes_simple_go_build_strip
在OSX上：
2076146 Jul 7 16:02 primes_no_symbols_from_go_build_s
1580786 Jul 7 16:02 primes_no_symbols_from_go_build_s_w
2076146 Jul 7 16:02 primes_simple_go_build
1997872 Jul 7 16:04 primes_simple_go_build_strip
英文:
strip and ld tools are OS specific, from
man strip
> When strip is used with no options on an executable file, it checks
> that file to see
> if it uses the dynamic link editor. If it does, the effect of the strip command is
> the same as using the -u and -r options. If the file does not use the dynamic link
> editor, the effect of strip without any options is the same as using the -s option of
> ld(1). The options -S, -x, and -X have the same effect as the ld(1) options. The
> options to strip(1) can be combined to trim the symbol table to just what is desired.
i.e. most ld's don't have -w, which means on OSX "suppress all warning messages"
on Linux/Debian
1187840 Jul 7 09:05 primes_no_symbols_from_go_build_s
1187840 Jul 7 09:05 primes_no_symbols_from_go_build_s_w
1755360 Jul 7 09:05 primes_simple_go_build
1187004 Jul 7 09:06 primes_simple_go_build_strip
on OSX
2076146 Jul 7 16:02 primes_no_symbols_from_go_build_s
1580786 Jul 7 16:02 primes_no_symbols_from_go_build_s_w
2076146 Jul 7 16:02 primes_simple_go_build
1997872 Jul 7 16:04 primes_simple_go_build_strip
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论