VS2005 compiles libcurl to normaliz Solution of Lib missing

    The recommended method is to curl of use dll Method implementation of IdnToAscii and IdnToUnicode, May refer to https://www.cnblogs.com/passedbylove/p/5979927.html. The following is based on curl 7.69.1 Modification of , It's no different from the modification of the original text , Just use ONLY_NORMALIZ_DLL Control the code , Convenient back .

    You can also add... Directly to the system Windows SDK v7.1, It contains Normaliz.lib, Then it will correspond to library route （C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Lib） Add project configuration .

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2016, Daniel Stenberg, <[email protected]>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/

 /*
  * IDN conversions using Windows kernel32 and normaliz libraries.
  */

#include "curl_setup.h"

#ifdef USE_WIN32_IDN

#define ONLY_NORMALIZ_DLL

#include "curl_multibyte.h"
#include "curl_memory.h"
#include "warnless.h"

  /* The last #include file should be: */
#include "memdebug.h"

#ifdef WANT_IDN_PROTOTYPES
#  if defined(ONLY_NORMALIZ_DLL)
typedef int (*fnIdnToAscii)(DWORD,const WCHAR *,int,WCHAR *,int);
typedef int (*fnIdnToUnicode)(DWORD,const WCHAR *,int,WCHAR *, int);
#  elif defined(_SAL_VERSION)
WINNORMALIZEAPI int WINAPI
IdnToAscii(_In_                           DWORD    dwFlags,
           _In_reads_(cchUnicodeChar)     LPCWSTR  lpUnicodeCharStr,
           _In_                           int      cchUnicodeChar,
           _Out_writes_opt_(cchASCIIChar) LPWSTR   lpASCIICharStr,
           _In_                           int      cchASCIIChar);
WINNORMALIZEAPI int WINAPI
IdnToUnicode(_In_                             DWORD   dwFlags,
             _In_reads_(cchASCIIChar)         LPCWSTR lpASCIICharStr,
             _In_                             int     cchASCIIChar,
             _Out_writes_opt_(cchUnicodeChar) LPWSTR  lpUnicodeCharStr,
             _In_                             int     cchUnicodeChar);
#  else
WINBASEAPI int WINAPI IdnToAscii(DWORD dwFlags,
                                 const WCHAR *lpUnicodeCharStr,
                                 int cchUnicodeChar,
                                 WCHAR *lpASCIICharStr,
                                 int cchASCIIChar);
WINBASEAPI int WINAPI IdnToUnicode(DWORD dwFlags,
                                   const WCHAR *lpASCIICharStr,
                                   int cchASCIIChar,
                                   WCHAR *lpUnicodeCharStr,
                                   int cchUnicodeChar);
#  endif
#endif

#define IDN_MAX_LENGTH 255

bool curl_win32_idn_to_ascii(const char *in, char **out);
bool curl_win32_ascii_to_idn(const char *in, char **out);

bool curl_win32_idn_to_ascii(const char *in, char **out)
{
  bool success = FALSE;
  wchar_t punycode[IDN_MAX_LENGTH];
  int chars = -1;
  wchar_t *in_w = Curl_convert_UTF8_to_wchar(in);
  if(in_w) {
#ifdef ONLY_NORMALIZ_DLL
    fnIdnToAscii IdnToAscii;
    HINSTANCE hNormalizDLL = LoadLibrary("normaliz.dll");
    if (!hNormalizDLL) {
//		FreeLibrary(hNormalizDLL);
        assert(hNormalizDLL);
        return FALSE;
    }
    IdnToAscii = (fnIdnToAscii)GetProcAddress(hNormalizDLL, "IdnToAscii");
    if (!IdnToAscii) {
    	FreeLibrary(hNormalizDLL);
        assert(IdnToAscii);
        return TRUE;
    }
#endif
    chars = IdnToAscii(0, in_w, -1, punycode, IDN_MAX_LENGTH);
#ifdef ONLY_NORMALIZ_DLL
    free(IdnToAscii);
    FreeLibrary(hNormalizDLL);
#endif
    free(in_w);
    if(chars) {
      *out = Curl_convert_wchar_to_UTF8(punycode);
      if(*out)
        success = TRUE;
    }
  }

  return success;
}

bool curl_win32_ascii_to_idn(const char *in, char **out)
{
  bool success = FALSE;
  int chars = -1;
  wchar_t *in_w = Curl_convert_UTF8_to_wchar(in);
  if(in_w) {
    size_t in_len = wcslen(in_w) + 1;
    wchar_t unicode[IDN_MAX_LENGTH];
#ifdef ONLY_NORMALIZ_DLL
    fnIdnToUnicode IdnToUnicode;
    
    HINSTANCE hNormalizDLL = LoadLibrary("normaliz.dll");
    if (!hNormalizDLL) {
//      FreeLibrary(hNormalizDLL);
        assert(hNormalizDLL);
        return FALSE;
    }
    IdnToUnicode = (fnIdnToUnicode)GetProcAddress(hNormalizDLL, "IdnToUnicode");
    if (!IdnToUnicode) {
        FreeLibrary(hNormalizDLL);
        assert(IdnToUnicode);
        return FALSE;
    }
#endif
    chars = IdnToUnicode(0, in_w, curlx_uztosi(in_len),
                             unicode, IDN_MAX_LENGTH);
#ifdef ONLY_NORMALIZ_DLL
    free(IdnToUnicode);
    FreeLibrary(hNormalizDLL);
#endif
    free(in_w);
    if(chars) {
      *out = Curl_convert_wchar_to_UTF8(unicode);
      if(*out)
        success = TRUE;
    }
  }

  return success;
}

#endif /* USE_WIN32_IDN */

Reference code ：

https://github.com/curl/curl/releases

https://github.com/blackrosezy/build-libcurl-windows