[ACCEPTED]-MSBuild.exe not accepting either /p:DefineConstants nor /p:PreprocessorDefinitions-c-preprocessor

Accepted answer
Score: 10

If you are calling MSBuild on the command 10 line you cannot specify the value for DefineConstants. But 9 if you are building a .csproj, or another 8 MSBuild script, then you can specify it. If 7 you create a msbuild file to "replace" your 6 solution file then you can use that an specify 5 the value for that when you build your projects. For 4 example:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <!-- Default value here -->
    <DefineConstants Condition=" '$(DefineConstants)'==''" >DEBUG;TRACE</DefineConstants>

    <Projects Include="one.csproj" />
    <Projects Include="two.csproj" />

  <Target Name="Build">
    <MSBuild Projects="@(Projects)"

Then you can use msbuild.exe buid.proj /p:DefineConstants="YourValue;Debug;Trace"

Note the usage 3 of the quotes on the command line.

I have 2 written a blog post a while back about something 1 related to this at http://sedodream.com/2008/05/07/MSBuildBuildingTheSameProjectMultipleTimes.aspx.

Score: 7

If you want to define TRACE & DEBUG 1 Constants this should work:

msbuild mysln.sln /t:Rebuild /p:Configuration=Release /p:DefineConstants="DEBUG;TRACE"
Score: 6

The below are needed modification to the 7 vcxproj for the /p to work.

put <DefineConstants>< /DefineConstants>

under 6 the <PropertyGroup Label=Globals >


This 5 way MSBuild will know that for the preprocessor 4 it needs to use the values from the DefineConstants 3 which come from the Globals PropertyGroup 2 unless provided from the command line by 1 the /p:DefineConstants="MY_DEFINE"

Score: 3

For completeness, this is what I found worked 2 when I wanted THING_TO_BE_DEFINED="VALUE WANTED", for VB.NET, and msbuild 1 version 3.5.30729.1, in a batch file:

@msbuild /t:Rebuild /p:Configuration=Release;Platform="Any CPU";
DefineConstants="THING_TO_BE_DEFINED=\"VALUE WANTED\"" mysln.sln

(all on one line of course)

More Related questions