go創建動態庫

• *nix
  *nix創建so比較方便，寫好go代碼之后，直接一條命令搞定。

go build -buildmode=c-shared -o libgobblob.so

命令執行之后，會生成libgobblob.h和 libgobblob.so

• windows

windows需要安裝gcc編譯器，我用的的MinGW包，解壓，把bin目錄加入環境變量。

然后執行命令之后發現會報錯，windows下go不支持生成動態庫。

>>go build -buildmode=c-shared -o libgobblob.dll
-buildmode=c-shared not supported on windows/amd64

這一步折騰了好久，最終在stackoverflow找到了解決方法。[[ https://stackoverflow.com/questions/40573401/building-a-dll-with-go-1-7 | building-a-dll-with-go]]

• 編譯靜態庫

go build -buildmode=c-archive -o libgobblob.a

• gobblob.c文件，然后把go代碼中要導出的函數，在gobblob.c中全部調用一遍。

#include <stdio.h>
#include "libgobblob.h"

// force gcc to link in go runtime (may be a better solution than this)
void dummy() {
   // 所有在go中要導出的代碼都在這里調用一次，參數隨便寫，只要能編譯ok即可
    gobblob_init(NULL,NULL,NULL);
    gobblob_deinit(NULL);
    gobblob(NULL,NULL,NULL,NULL,NULL,NULL);
}

int main() {

}

• 執行如下命令，生成dll

gcc -shared -pthread -o libgobblob.dll gobblob.c libgobblob.a -lWinMM -lntdll -lWS2_32 -Iinclude