iconv-go升級過程中的編譯問題

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

 

工作項目原因，需要對golang進行升級。升級之後老的iconv-go運行有問題。因為新的golang運行更加嚴格，所以需要升級iconv-go.

從djimenez/iconv-go 拉下來代碼進行編譯發現“找不到iconv庫的一些介面”,目測是庫沒鏈進來。錯誤資訊如下：

go install ./...# github.com/djimenez/iconv-go/tmp/go-build579267556/github.com/djimenez/iconv-go/_obj/converter.cgo2.o: In function `_cgo_5f3e10abf205_Cfunc_iconv_open':src/github.com/djimenez/iconv-go/converter.go:142: undefined reference to `libiconv_open'/tmp/go-build579267556/github.com/djimenez/iconv-go/_obj/converter.cgo2.o: In function `_cgo_5f3e10abf205_Cfunc_iconv_close':src/github.com/djimenez/iconv-go/converter.go:128: undefined reference to `libiconv_close'/tmp/go-build579267556/github.com/djimenez/iconv-go/_obj/converter.cgo2.o: In function `_cgo_5f3e10abf205_C2func_iconv_open':src/github.com/djimenez/iconv-go/converter.go:87: undefined reference to `libiconv_open'/tmp/go-build579267556/github.com/djimenez/iconv-go/_obj/converter.cgo2.o: In function `_cgo_5f3e10abf205_C2func_iconv_close':src/github.com/djimenez/iconv-go/converter.go:71: undefined reference to `libiconv_close'/tmp/go-build579267556/github.com/djimenez/iconv-go/_obj/converter.cgo2.o: In function `call_iconv':src/github.com/djimenez/iconv-go/converter.go:13: undefined reference to `libiconv'collect2: ld returned 1 exit status

很奇怪，本地明明有安裝iconv，怎麼就找不到iconv庫？

iconv --versioniconv (GNU libiconv 1.14)Copyright (C) 2000-2011 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law.Written by Bruno Haible.

 

進到iconv-go的converter.go發現

package iconv/*#cgo darwin LDFLAGS: -liconv#cgo freebsd LDFLAGS: -liconv#cgo windows LDFLAGS: -liconv#include <stdlib.h>#include <iconv.h>// As of GO 1.6 passing a pointer to Go pointer, will lead to panic// Therofore we use this wrapper function, to avoid passing **char directly from gosize_t call_iconv(iconv_t ctx, char *in, size_t *size_in, char *out, size_t *size_out){        return iconv(ctx, &in, size_in, &out, size_out);}*/

我了個去，darwin，freebsd，windows都有。但是我在centos下使用的。難不成是這個原因，導致iconv庫沒有鏈進去？於是嘗試進行了修改。

package iconv/*#cgo darwin LDFLAGS: -liconv#cgo freebsd LDFLAGS: -liconv#cgo windows LDFLAGS: -liconv#cgo LDFLAGS: -liconv#include <stdlib.h>#include <iconv.h>// As of GO 1.6 passing a pointer to Go pointer, will lead to panic// Therofore we use this wrapper function, to avoid passing **char directly from gosize_t call_iconv(iconv_t ctx, char *in, size_t *size_in, char *out, size_t *size_out){        return iconv(ctx, &in, size_in, &out, size_out);}*/

再進行編譯。奇蹟般的通過了，通過了，通過了。。。

好吧，目前只是這樣猥瑣的解決的。這樣寫不知道會不會對跨平台造成影響。先這樣解決吧。記錄一下。

如果哪位同仁看到這篇文章，覺得不是這樣解決的，請不吝賜教。