英文:
gccgo -static vs -static-libgo
问题
-static 和 -static-libgo 在 gccgo 中有什么区别？文档似乎没有真正解释发生了什么：
- 使用
-static-libgo选项对编译的包进行静态链接。 - 使用
-static选项进行完全静态链接（gc 编译器的默认选项）。
-static-libgo 只是对 libgo.a 进行静态链接吗？而 -static 是完整的 glibc 库静态链接？
英文:
What is the difference between -static and -static-libgo for gccgo? The documentation doesn't seem to really shed light on what is going on:
- Use the
-static-libgooption to link statically against the compiled packages. - Use the
-staticoption to do a fully static link (the default for the gc compiler).
Is -static-libgo only static linking libgo.a only? While -static is full glibc library?
答案1
得分: 11
检查生成的ELF文件中的动态链接：
使用gc静态构建：
$ go build hello.go
$ readelf -d hello
此文件中没有动态部分。
gccgo默认动态链接到libgo、libc等：
$ go build -compiler gccgo hello.go
$ readelf -d hello
偏移量为0x36e0的动态部分包含29个条目：
标签 类型 名称/值
0x0000000000000001 (NEEDED) 共享库: [libgo.so.5]
0x0000000000000001 (NEEDED) 共享库: [libm.so.6]
0x0000000000000001 (NEEDED) 共享库: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) 共享库: [libc.so.6]
0x0000000000000001 (NEEDED) 共享库: [ld-linux-x86-64.so.2]
0x0000000000000001 (NEEDED) 共享库: [libpthread.so.0]
将libgo嵌入可执行文件中，但仍然动态链接到libc等：
$ go build -compiler gccgo -gccgoflags '-static-libgo' hello.go
$ readelf -d hello
偏移量为0x128068的动态部分包含28个条目：
标签 类型 名称/值
0x0000000000000001 (NEEDED) 共享库: [libpthread.so.0]
0x0000000000000001 (NEEDED) 共享库: [libm.so.6]
0x0000000000000001 (NEEDED) 共享库: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) 共享库: [libc.so.6]
0x0000000000000001 (NEEDED) 共享库: [ld-linux-x86-64.so.2]
静态链接所有内容：
$ go build -compiler gccgo -gccgoflags '-static' hello.go
$ readelf -d hello
此文件中没有动态部分。
英文:
Check the dynamic linkage in the generated ELFs:
gc builds statically:
$ go build hello.go
$ readelf -d hello
There is no dynamic section in this file.
gccgo links dynamically against libgo, libc etc. by default:
$ go build -compiler gccgo hello.go
$ readelf -d hello
Dynamic section at offset 0x36e0 contains 29 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libgo.so.5]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x0000000000000001 (NEEDED) Shared library: [ld-linux-x86-64.so.2]
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
Bake libgo inside the executable, but still link dynamically to libc and friends:
$ go build -compiler gccgo -gccgoflags '-static-libgo' hello.go
$ readelf -d hello
Dynamic section at offset 0x128068 contains 28 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]
0x0000000000000001 (NEEDED) Shared library: [libm.so.6]
0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x0000000000000001 (NEEDED) Shared library: [ld-linux-x86-64.so.2]
Link everything statically:
$ go build -compiler gccgo -gccgoflags '-static' hello.go
$ readelf -d hello
There is no dynamic section in this file.
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