MSBuild 2019 ignores INCLUDE environment variable

I am working with two machines that have Visual Studio 2019. One has Community edition, the other has Pro edition.

The pro edition of MSBuild is completely ignoring the INCLUDE environment variable, so the project I'm trying to build (ICU) cannot find stddef.h. The stddef.h file is in the Windows Kits 10 ucrt directory, which is included in the INCLUDE env var.

The community edition doesn't do this.

When I build the project with the /v:diag option I can see most of what's defined in the INCLUDE env var is added to a variable named CAExcludePath.

Here's the INCLUDE env var: INCLUDE=C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.24.28314\include;;C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.24.28314\atlmfc\include;;C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\VS\include;;C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt;;;C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\VS\UnitTest\include;C:\Program Files (x86)\Windows Kits\8.1\Include\um;C:\Program Files (x86)\Windows Kits\8.1\Include\shared;C:\Program Files (x86)\Windows Kits\8.1\Include\winrt;;

And here's the CAExcludePath: CAExcludePath=C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.24.28314\atlmfc\include;C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.24.28314\include;C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt;;C:\Program Files (x86)\Windows Kits\8.1\Include\um;C:\Program Files (x86)\Windows Kits\8.1\Include\shared;C:\Program Files (x86)\Windows Kits\8.1\Include\winrt;;

Why does this happen and how do I prevent it?



Read more here: https://stackoverflow.com/questions/60516987/msbuild-2019-ignores-include-environment-variable

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