cgo调用静态库失败
我的macos版本是：10.15.5
golang版本是：1.14.4
编译golang程序时，链接静态库报以下错误：
```shell
# command-line-arguments
ld: warning: ignoring file ./libtest.a, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x21 0x3C 0x61 0x72 0x63 0x68 0x3E 0x0A 0x2F 0x20 0x20 0x20 0x20 0x20 0x20 0x20 )
Undefined symbols for architecture x86_64:
"_Add", referenced from:
__cgo_cb1f4926c095_Cfunc_Add in _x002.o
(maybe you meant: __cgo_cb1f4926c095_Cfunc_Add)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
我用的链接方式如下：
```go
package main
/*
#cgo LDFLAGS: -L ./ -ltest
#include "test.h"
*/
import "C"
import "fmt"
func main() {
fmt.Println(C.Add(C.int(1),C.int(2)))
}
```
找到原因了。是因为mac上面装了binutils，这个工具会改变ar，sanlib（建立静态库符号索引用的）的指向。指向了linux的工具，所以找不到symbol。
#1
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<a href="/user/hijackwust" title="@hijackwust">@hijackwust</a> 是的。
#3
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