如何将PreProcessorDefinitions设置为msbuild任务的任务属性

问题描述

以下摘自常规的VS2010 C ++项目.

The following is taken from a regular VS2010 C++ project.

    <ClCompile>
      <WarningLevel>Level3</WarningLevel>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <Optimization>MaxSpeed</Optimization>
      <FunctionLevelLinking>true</FunctionLevelLinking>
      <IntrinsicFunctions>true</IntrinsicFunctions>
      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
    </ClCompile>

如果我编辑PreprocessorDefinitions，则可以设置预处理器使用的定义.我可以通过#ifdef等在代码中看到这一点.

If i edit PreprocessorDefinitions i can set a definition that is used by the preprocessor. I can see this in my code via #ifdef etc.

但是，如果我使用以下

  <Target Name="NormalBuild" Condition=" '$(_InvalidConfigurationWarning)' != 'true' " DependsOnTargets="_DetermineManagedStateFromCL;CustomBeforeBuild;$(BuildDependsOn)" Returns="@(ManagedTargetPath)">
    <ItemGroup>
        <ManagedTargetPath Include="$(TargetPath)" Condition="'$(ManagedAssembly)' == 'true'" />
    </ItemGroup>
      <Message Text="PreprocessorDefinitions: $(PreprocessorDefinitions)" Importance="High" />
  </Target>

  <Target Name="TestBuild" Returns="@(ManagedTargetPath)">
    <MSBuild Projects="demo.vcxproj" Targets="NormalBuild" Properties="PreprocessorDefinitions=THISGETSSETBUTDOESNOTHING"/>
  </Target>

我还可以通过消息看到PreprocessorDefinitions包含我通过Properties="PreprocessorDefinitions=THISGETSSETBUTDOESNOTHING"设置的值，但是我无法使用#ifdef等控制我的构建.如果我使用常规设置并尝试使用<Message Text="PreprocessorDefinitions: $(PreprocessorDefinitions)"输出PreprocessorDefinitions，则该字段实际上为空白，并且不包含预期的<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>，尽管我可以使用这些键中的任何一个使用#ifdef等来控制我的构建.

i can also see via the message that PreprocessorDefinitions contains the value i set via Properties="PreprocessorDefinitions=THISGETSSETBUTDOESNOTHING" but i can not control my build using #ifdef etc.If i use a regular setup and try to output PreprocessorDefinitions using <Message Text="PreprocessorDefinitions: $(PreprocessorDefinitions)" the field is actually blank and does not contain the expected <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions> although i can use any one of those keys to control my build using #ifdef etc.

1. 那是为什么?
2. 如何通过任务Properties元素在VS2010 C ++项目中传递PreprocessorDefinitions?

1. Why is that?
2. What can i do to pass PreprocessorDefinitions für a VS2010 C++ Project via the tasks Properties element?

推荐答案

您不能在不修改demo.vcxproj的情况下执行此操作，因为您需要访问CLCompile的PreprocessorDefinitions，而不是PropertyGroup，因此无法通过MSBuild命令行传递.

You can't do this without modifying demo.vcxproj because you need access to the PreprocessorDefinitions of CLCompile, which is not a PropertyGroup, and thus can't be passed via the MSBuild command line.

您可以通过项目属性->配置属性-> C/C ++->预处理器在GUI中修改预处理器定义，或直接编辑XML:

You can modify the preprocessor definitions in the GUI via Project Properties -> Configuration Propertis -> C/C++ -> Preprocessor, or edit the XML directly:

  <ClCompile>
    ....
    <PreprocessorDefinitions>$(MyMacro);%(PreprocessorDefinitions)</PreprocessorDefinitions>
  </ClCompile>

在您的MSBuild项目中:

In your MSBuild project:

  <Target Name="TestBuild" Returns="@(ManagedTargetPath)">
    <MSBuild Projects="demo.vcxproj" Targets="NormalBuild" Properties="MyMacro=THISGETSSETBUTDOESNOTHING"/>
  </Target>

这等效于以以下方式运行MSBuild.exe:

This is equivalent to running MSBuild.exe as:

  MSBuild demo.vcxproj /p:MyMacro=THISGETSSETBUTDOESNOTHING

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