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我是 C++ 新手，我决定尝试一下 Visual Studio C++、Boost、llvm（在 boost 1.55 和 Visual Studio 2013 中已经失败）和 redis。

这是一个小型宠物项目，用于解析从套接字读取的原始数据并缓存到 redis 中。

当我尝试链接到hiredis.lib 时，我遇到了很多错误。

我知道我做错了什么，但我的试验变成了无休止的循环。我anybosy可以指导它，将不胜感激。

亲切的问候。

错误：

1>------ Build started: Project: example4, Configuration: Debug x64 ------
1>  Source.cpp
1>LIBCMTD.lib(dosmap.obj) : error LNK2005: _errno already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: _CrtSetCheckCount already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: _aligned_free already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: _aligned_malloc already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(dbgheap.obj) : error LNK2005: _calloc_dbg already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_wctype.obj) : error LNK2005: iswalnum already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_wctype.obj) : error LNK2005: iswalpha already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_wctype.obj) : error LNK2005: iswgraph already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_wctype.obj) : error LNK2005: iswspace already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(mlock.obj) : error LNK2005: _lock already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(mlock.obj) : error LNK2005: _unlock already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winapisupp.obj) : error LNK2005: __crtCaptureCurrentContext already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winapisupp.obj) : error LNK2005: __crtCapturePreviousContext already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winapisupp.obj) : error LNK2005: __crtSetUnhandledExceptionFilter already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winapisupp.obj) : error LNK2005: __crtTerminateProcess already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winapisupp.obj) : error LNK2005: __crtUnhandledException already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(tidtable.obj) : error LNK2005: _getptd already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(invarg.obj) : error LNK2005: _invalid_parameter already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(sprintf.obj) : error LNK2005: sprintf already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(dbghook.obj) : error LNK2005: __crt_debugger_hook already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_file.obj) : error LNK2005: __iob_func already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_file.obj) : error LNK2005: _lock_file already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(_file.obj) : error LNK2005: _unlock_file already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0dat.obj) : error LNK2005: _amsg_exit already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0dat.obj) : error LNK2005: _cexit already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0dat.obj) : error LNK2005: _exit already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0dat.obj) : error LNK2005: _initterm_e already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0dat.obj) : error LNK2005: exit already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(errmode.obj) : error LNK2005: __set_app_type already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(winxfltr.obj) : error LNK2005: _XcptFilter already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(wsetloca.obj) : error LNK2005: _configthreadlocale already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(vsnprnc.obj) : error LNK2005: vsprintf_s already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(fflush.obj) : error LNK2005: fflush already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(hooks.obj) : error LNK2005: "void __cdecl terminate(void)" (?terminate@@YAXXZ) already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(crt0init.obj) : error LNK2005: __xi_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMTD.lib(crt0init.obj) : error LNK2005: __xi_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMTD.lib(crt0init.obj) : error LNK2005: __xc_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMTD.lib(crt0init.obj) : error LNK2005: __xc_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMTD.lib(dbgrptw.obj) : error LNK2005: _CrtDbgReportW already defined in MSVCRTD.lib(MSVCR120D.dll)
1>LIBCMTD.lib(printf.obj) : error LNK2005: printf already defined in MSVCRTD.lib(MSVCR120D.dll)
1>MSVCRTD.lib(MSVCR120D.dll) : error LNK2005: strcpy_s already defined in LIBCMTD.lib(strcpy_s.obj)
1>MSVCRTD.lib(MSVCR120D.dll) : error LNK2005: iswdigit already defined in LIBCMTD.lib(_wctype.obj)
1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
1>LINK : warning LNK4098: defaultlib 'LIBCMTD' conflicts with use of other libs; use /NODEFAULTLIB:library
1>hiredis.lib(hiredis.obj) : error LNK2019: unresolved external symbol strerror_r referenced in function __redisSetError
1>hiredis.lib(net.obj) : error LNK2001: unresolved external symbol strerror_r
1>hiredis.lib(hiredis.obj) : error LNK2001: unresolved external symbol fdapi_close
1>hiredis.lib(net.obj) : error LNK2001: unresolved external symbol fdapi_close
1>hiredis.lib(net.obj) : error LNK2001: unresolved external symbol fcntl
1>hiredis.lib(net.obj) : error LNK2001: unresolved external symbol poll
1>F:\SoftwareDevelopment\cplusplus\example4\x64\Debug\example4.exe : fatal error LNK1120: 4 unresolved externals
========== Build: 0 succeeded, 1 failed, 2 up-to-date, 0 skipped ==========

项目文件：

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    <ProjectConfiguration Include="Release|Win32">
      <Configuration>Release</Configuration>
      <Platform>Win32</Platform>
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    <ProjectConfiguration Include="Release|x64">
      <Configuration>Release</Configuration>
      <Platform>x64</Platform>
    </ProjectConfiguration>
  </ItemGroup>
  <PropertyGroup Label="Globals">
    <ProjectGuid>{FADCAD1B-D309-427E-8A12-2140E0CC1E3C}</ProjectGuid>
    <Keyword>Win32Proj</Keyword>
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    <LinkIncremental>false</LinkIncremental>
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    <LinkIncremental>false</LinkIncremental>
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  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <PrecompiledHeader>NotUsing</PrecompiledHeader>
      <WarningLevel>Level3</WarningLevel>
      <Optimization>Disabled</Optimization>
      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <AdditionalIncludeDirectories>F:\Software\boost_1_55_0;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
      <DebugInformationFormat>None</DebugInformationFormat>
      <MultiProcessorCompilation>true</MultiProcessorCompilation>
      <MinimalRebuild>false</MinimalRebuild>
    </ClCompile>
    <Link>
      <SubSystem>Console</SubSystem>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <AdditionalLibraryDirectories>F:\Software\boost_1_55_0\stage\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
    </Link>
    <PostBuildEvent>
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      <WarningLevel>Level3</WarningLevel>
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      <AdditionalIncludeDirectories>F:\Software\boost_1_55_0;F:\Software\redis\deps\hiredis;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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4

3 回答 3

2

在构建使用hiredis的可执行文件时，请确保链接到 hiredis.libWin32_Interop.lib

Configuration Properties > Linker > Input > Additional Dependencies

此外，您可能希望将Multi-threaded DLL (/MD)正在构建的所有项目的运行时库更改为 dll 版本 ()

Configuration Properties > C/C++ > Code Generation > Runtime-Library
于 2015-01-25T19:21:30.730 回答
1

您需要链接hiredis.libAND Win32_Interop.lib。

您看到的错误是因为hiredis.lib您使用的是（多线程（/MT））构建的，并且您的可执行文件使用了 /MD 运行时库。

您可以在下面更改它

Configuration Properties > C/C++ > Code Generation > Runtime-Library

从https://github.com/MSOpenTech/redis下载源代码hiredis.lib并Win32_Interop.lib使用 /MD 标志和正确的平台（Win32 或 x64）重新构建 。这两个项目都在/msvc/RedisServer.sln.

于 2015-02-24T21:14:39.710 回答
0

一、设置项目属性

1

项目 > 属性 > 配置属性

常规 > 项目默认值 > 字符集使用多字节字符集

2

C/C++ > 代码生成 > 运行时库多线程调试 (/MTd)

然后尝试编译您的项目...

新错误似乎超出了）

1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppBuild.targets(376,5)：错误MSB8031：不推荐为非Unicode字符集构建MFC项目. 您必须将项目属性更改为 Unicode 或下载其他库。有关详细信息，请参阅http://go.microsoft.com/fwlink/p/?LinkId=286820。

您必须下载“MFC MBCS DLL”

我尝试解决此问题，并下载并安装此文件...

于 2014-06-02T11:17:45.200 回答