Run ROOT 6.19.02 on Windows 10

[steven_sani]

Hi,

I tried to run ROOT 6.19.02 on Windows 10 from Visual Studio 2019 Developer Command Prompt but I got the following message:

input_line_1:1:10: fatal error: ‘new’ file not found
#include
^~~~~
Assertion failed: OldBuilder->DeferredDeclsToEmit.empty() && “Should have emitted all decls deferred to emit.”, file C:\build\ws\BUILDTYPE\Release\LABEL\windows10\V\6-20\root\interpreter\llvm\src\tools\clang\lib\CodeGen\ModuleBuilder.cpp, line 139

After this, the ROOT does not start. Could you help me to solve this problem?

[bellenot]

This is most probably due to different versions of Visual Studio (and/or Windows 10 SDK) between the one installed on your system and the one used to build ROOT. While we will work to get rid of this limitation, I think the only solution would be to build ROOT from source

[steven_sani]

The problem was the different versions of Windows 10 SDK. Now it works. Thank you very much for your help!

[demetrius2003]

Hi! What version of SDK should I install on Windows 10 to work with root_v6.20.02.win32.vc16? Thank you!

[bellenot]

Windows SDK version 10.0.18362.0

[demetrius2003]

Try to install Windows SDK version 10.0.18362.0, but it setup 18362.1 instead and with it ROOT cannot work properly - i still get a bunch of errors!

[bellenot]

@demetrius2003

Try to install Windows SDK version 10.0.18362.0, but it setup 18362.1 instead

How did you get it? The latest one is 10.0.18362.0

[demetrius2003]

Just run vs install utility. See uploaded pictures.

[demetrius2003]

But then:

[demetrius2003]

And if you try to download Windows SDK version 10.0.18362.0 from MS site, you get new version! 1 not 0!

[bellenot]

OK, so you will have to build ROOT from source

[steven_sani]

I installed Windows SDK version 10.0.18362.1 and ROOT 6.20.02 works without any problem.

[demetrius2003]

No luck! How can i compile ROOT from sources? Is any tutorial?

[bellenot]

There are several topics you can find on this forum, for example:

Compiling ROOT on Windows 10

Hi all, I know you guys are doing progress on supporting ROOT on Windows, so I decided to go ahead and test out and see how this whole experience is I have cloned the master branch and made a rootbuild directory. However, after running cmake ..\root, CMake complains that it cannot find headers related to pthread. My guess is that I don’t have everything installed to build ROOT on my box. So part of my question is then also what are the prerequisites for Windows? (I can’t seem to …

You need CMake (latest version), and then you can:

• Unzip the source tar file in a directory not containing any space
• Open a x86 Native Tools Command Prompt for VS 2019 !!!And NOT a x64 one!!!
• Create a build directory of your choice and cd into it
• Then configure ROOT with: cmake -G "Visual Studio 16 2019" -A Win32 -Thost=x64 -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_CXX_STANDARD=14 [path to source]
• Then, if there was no error, build ROOT: cmake --build . --config Debug

Note that if you need more options, you can open a cmake-gui where you can select the different options before building ROOT (be aware that all of them are not supported on Windows)

[demetrius2003]

Thanks! Its work! Its took me something about 7-8 hours to compile ROOT on Xeon X5460 with 4 Gb RAM/