如何使用Visual Studio构建libiconv

参考博文：How to Build libiconv with Microsoft Visual Studio - CodeProject

libiconv源码下载地址：libiconv - GNU Project - Free Software Foundation (FSF)

目前最新版本为1.15，将下载的libiconv-1.15.tar.gz解压后得到libiconv-1.15

新建Win32工程，名称为libiconv，应用类型为DLL，附加选项为空工程，点击完成

将libiconv-1.15\lib中的relocatable.h、relocatable.c、iconv.c复制到libiconv\libiconv

复制libiconv-1.15\libcharset\lib\localcharset.c到libiconv\libiconv

复制libiconv-1.15\libcharset\include\localcharset.h.build.in到libiconv\libiconv，将其重命名为localcharset.h

在libiconv中创建文件夹include

复制libiconv-1.15\include\iconv.h.build.in到libiconv\include，将其重命名为iconv.h

复制libiconv-1.15\config.h.in到libiconv\include，将其重命名为config.h

复制libiconv-1.15\lib中的所有头文件（*.h）和定义文件（*.def）到libiconv\include

将libiconv\libiconv中的所有源文件和头文件添加到工程中

注释localcharset.c中的代码

/* Get LIBDIR. */
//#ifndef LIBDIR
//# include "configmake.h"
//#endif

修改iconv.c中的ICONV_CONST为const

在localcharset.h中注释并添加代码

//#if @HAVE_VISIBILITY@ && BUILDING_LIBCHARSET
//#define LIBCHARSET_DLL_EXPORTED __attribute__((__visibility__("default")))
//#else
//#define LIBCHARSET_DLL_EXPORTED
//#endif
#ifdef BUILDING_LIBCHARSET
#define LIBCHARSET_DLL_EXPORTED __declspec(dllexport)
#elif USING_STATIC_LIBICONV
#define LIBCHARSET_DLL_EXPORTED
#else
#define LIBCHARSET_DLL_EXPORTED __declspec(dllimport)
#endif

注释config.h中的代码

/* Define as good substitute value for EILSEQ. */
//#undef EILSEQ

在iconv.h中注释并添加代码

//#if @HAVE_WCHAR_T@
#if HAVE_WCHAR_T

//#if @USE_MBSTATE_T@
#if USE_MBSTATE_T

//#if @USE_MBSTATE_T@
//#if @BROKEN_WCHAR_H@
#if USE_MBSTATE_T
#if BROKEN_WCHAR_H

//extern LIBICONV_DLL_EXPORTED size_t iconv (iconv_t cd, @ICONV_CONST@ char* * inbuf, size_t *inbytesleft, char* * outbuf, size_t *outbytesleft);
extern LIBICONV_DLL_EXPORTED size_t iconv(iconv_t cd, const char* * inbuf, size_t *inbytesleft, char* * outbuf, size_t *outbytesleft);

/*#if @HAVE_VISIBILITY@ && BUILDING_LIBICONV
#define LIBICONV_DLL_EXPORTED __attribute__((__visibility__("default")))
#else
#define LIBICONV_DLL_EXPORTED
#endif
extern LIBICONV_DLL_EXPORTED @DLL_VARIABLE@ int _libiconv_version;*/ /* Likewise */
#if BUILDING_LIBICONV
#define LIBICONV_DLL_EXPORTED __declspec(dllexport)
#elif USING_STATIC_LIBICONV
#define LIBICONV_DLL_EXPORTED
#else
#define LIBICONV_DLL_EXPORTED __declspec(dllimport)
#endif
extern LIBICONV_DLL_EXPORTED int _libiconv_version;

进入工程属性->VC++目录，在包含目录中添加$(SolutionDir)include

构建工程即可得到库文件libiconv.dll、libiconv.lib