Root Libraries on Visual studio

imLivai · January 23, 2020, 3:19pm

Dear Rooters,
I am currently studying physics at UniTO and i was asked to use root libraries in order to perform some data analysis.
I have alredy read Every single post about this topic on this forum yet coudd not manage to get root working on Vs.
I have alredy installed root and added the \include (c+±general) and \lib (linker-general) in the project properties.

My code is the following

#include <TROOT.h>
#include <TCanvas.h>
using namespace std;
int main()
{
	TCanvas* canv = new TCanvas("c1", "", 200, 10, 1280, 720);
	system("pause");
	return 0;
}

And this are the errors i get.

1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\ROOT\RWrap_libcpp_string_view.h(423,22): error C2589: ‘(’: illegal token on right side of ‘::’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\ROOT\libcpp_string_view.h(193,9): warning C4068: unknown pragma
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(537,1): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(537,1): message : This diagnostic occurred in the compiler generated function ‘std::enable_if<ROOT::TypeTraits::IsSignedNumeral::value,TString>::type operator +(T,const TString &)’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(547,1): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(547,1): message : This diagnostic occurred in the compiler generated function ‘std::enable_if<ROOT::TypeTraits::IsUnsignedNumeral::value,TString>::type operator +(T,const TString &)’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(557,1): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(557,1): message : This diagnostic occurred in the compiler generated function ‘std::enable_if<IsFloatNumeral::value,TString>::type operator +(T,const TString &)’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(560,54): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(572,40): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(611,60): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(620,52): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(635,44): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(645,49): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(657,47): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(678,49): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(691,68): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(694,68): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TString.h(697,69): warning C4267: ‘argument’: conversion from ‘size_t’ to ‘Ssiz_t’, possible loss of data
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TInterpreter.h(345,1): warning C4311: ‘type cast’: pointer truncation from ‘void *’ to ‘Long_t’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TInterpreter.h(345,1): warning C4302: ‘type cast’: truncation from ‘void *’ to ‘Long_t’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TVirtualQConnection.h(36,33): warning C4311: ‘type cast’: pointer truncation from ‘const void *’ to ‘Long_t’
1>D:\Programmazione\Nuova cartella\root_v6.18.04\include\TVirtualQConnection.h(36,33): warning C4302: ‘type cast’: truncation from ‘const void *’ to ‘Long_t’
1>Done building project “AnalisiDati.vcxproj” – FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Any suggestion?
Thanks a lot.

ROOT Version: root_v6.18.04
Platform: Visual Studio 2019

bellenot · January 23, 2020, 3:36pm

Hi,

First, ROOT is 32 bit only (i.e. you cannot create a win64 application). Then, I would advise to start with C++ macros you run with ROOT, instead of creating your own application. For example, your code cannot work. an instance of TApplication and a call to TApplication::Run() is needed for handling ROOT events, and don’t use system("pause")
You can also take a look at the examples in the test directory

Cheers, Bertrand.

imLivai · January 23, 2020, 4:03pm

Thanks for your reply,
can you explain me how to use root libraries in any visual studio enviroment?
Thanks.

bellenot · January 23, 2020, 4:06pm

Well, you have to include the proper headers and link against the root libraries, like in any C++ project using external libraries. Are you familiar with C++ and Visual Studio?

imLivai · January 23, 2020, 4:15pm

I am afraid I can’t say that i’m familiar with c++ and vs.
Yet it is very important for me to get all of this working and I will follow your instructions.
Here is what i have done so far:
-Dowloaded and installed (here “D:\Programmazione\Nuova cartella\root_v6.18.04”) the binary distribution Windows Visual Studio 2019.exe (not dbg)
-Opened a previuosly empty project of vs
-Added a new properti page and added in C++ -general-additional include directories D:\Programmazione\Nuova cartella\root_v6.18.04\include;%(AdditionalIncludeDirectories)
and in linker - general - additional library directories D:\Programmazione\Nuova cartella\root_v6.18.04\lib;%(AdditionalLibraryDirectories)

bellenot · January 24, 2020, 7:47am

OK, so now, as I said, you have to write your code, include the proper headers and link against the root libraries

Yore · February 18, 2020, 1:17pm

Hello, I’m sorry to disturb you. I did all the above things, but there are still errors after running.

bellenot · February 18, 2020, 1:53pm

Can you try to compile your code in the x86 Native Tools Command Prompt for VS 2019:

cl -nologo -Z7 -MD -GR -EHsc ConsoleApplication1.cpp -I %ROOTSYS%\include /link -LIBPATH:%ROOTSYS%\lib libCore.lib libGui.lib libGpad.lib libHist.lib

Yore · February 18, 2020, 2:37pm

Thank you very much for your reply. The program can execute successfully when using the Command Prompt for VS 2019,but why?

bellenot · February 18, 2020, 2:38pm

Check the compilation flags

Yore · February 18, 2020, 4:18pm

Thanks! I modified the properties of ConsoleApplication1 according to the compilation flags, but it still can’t run. Is there any problem?

bellenot · February 19, 2020, 7:55am

Well, there is most probably an incompatible flag in your long list of flags… I will need time to analyse which one(s) can cause the issue

Yore · February 19, 2020, 8:04am

Thank you very much for your help！

Yore · February 19, 2020, 8:25am

cl ConsoleApplication1.cpp -I E:\Tools\root_v6.18.04\include /link -LIBPATH:E:\Tools\root_v6.18.04\lib libCore.lib libGui.lib libGpad.lib libHist.lib

I’ve just tried. The above code can also work normally. I guess the problem may be in the .lib file.

bellenot · February 19, 2020, 8:44am

remove the /permissive- flag

Yore · February 19, 2020, 9:17am

Succeed! Thank you so much! This problem has been bothering me for three days!

M1ndBlast · October 20, 2021, 11:32pm

Hi. I tried everythin in post, but I can’t compile using F5 yet.

I used cl .\cauchy\cauchy.cpp - I C : \root_v6.24.06\include / link - LIBPATH:C:\root_v6.24.06\lib libCore.lib libGui.lib libGpad.lib libHist.lib and it works but I haven’t idea what’s wrog

I already removed the /permissive- flag

bellenot · October 21, 2021, 6:16am

Welcome to the ROOT Forum!
Try with those flags:

-nologo -Zc:__cplusplus -MD -GR -EHsc- -W3 -D_WIN32

i.e. without debug runtime libraries (MD instead of MDd), and check for the other flags. They must be the same than the one used to build ROOT.
And make sure also to properly specify the ROOT libraries in your project
And I would advise to start a new topic instead of replying to an old one which is already solved