What bit of initilization code am I missing?

ROOT
1

Hi,
I have a small bit of stand-alone code that does the following:

main()
{
gSystem->CompileMacro(“query.cxx”, “k”);
}

If I add “gROOT->ProcessLine(”");" before that line the compile almost always works (not 100%).

Many bits of ROOT work w/out doing any extra initialization, but obviously not this bit (see errors below, from a Windows system). What initalization am I missing?

Info in <TWinNTSystem::ACLiC>: creating shared library C:\Users\gwatts\Documents \test\query_cxx.dll 26926_cint.cxx Error in <TWinNTSystem::DynamicPathName>: scanner does not exist in C:\Program F iles (x86)\Microsoft F#\v4.0\;C:\Program Files (x86)\Microsoft Visual Studio 10. 0\VSTSDB\Deploy;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\ ;C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN;C:\Program Files (x8 6)\Microsoft Visual Studio 10.0\Common7\Tools;C:\Windows\Microsoft.NET\Framework \v4.0.30319;C:\Windows\Microsoft.NET\Framework\v3.5;C:\Program Files (x86)\Micro soft Visual Studio 10.0\VC\VCPackages;C:\Program Files (x86)\HTML Help Workshop; C:\Program Files (x86)\Microsoft Visual Studio 10.0\Team Tools\Performance Tools ;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\bin\NETFX 4.0 Tools;C:\Prog ram Files (x86)\Microsoft SDKs\Windows\v7.0A\bin;C:\Program Files\Common Files\M icrosoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Share d\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Window s\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.A CE\Core-Static;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Pr ogram Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files \TortoiseSVN\bin;C:\Program Files (x86)\TortoiseHg\;C:\Program Files (x86)\CVSNT \;c:\root\bin;.;c:\root/bin;;c:\root/lib;c:\root/cint/cint/stl, or has wrong file extension (.dll) query_cxx_ACLiC_dict.cxx Creating library C:\Users\gwatts\Documents\test\query_cxx.lib and object C:\U sers\gwatts\Documents\test\query_cxx.exp Error in <TWinNTSystem::DynamicPathName>: scanner does not exist in C:\Program F iles (x86)\Microsoft F#\v4.0\;C:\Program Files (x86)\Microsoft Visual Studio 10. 0\VSTSDB\Deploy;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\ ;C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN;C:\Program Files (x8 6)\Microsoft Visual Studio 10.0\Common7\Tools;C:\Windows\Microsoft.NET\Framework \v4.0.30319;C:\Windows\Microsoft.NET\Framework\v3.5;C:\Program Files (x86)\Micro soft Visual Studio 10.0\VC\VCPackages;C:\Program Files (x86)\HTML Help Workshop; C:\Program Files (x86)\Microsoft Visual Studio 10.0\Team Tools\Performance Tools ;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\bin\NETFX 4.0 Tools;C:\Prog ram Files (x86)\Microsoft SDKs\Windows\v7.0A\bin;C:\Program Files\Common Files\M icrosoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Share d\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Window s\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.A CE\Core-Static;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Pr ogram Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files \TortoiseSVN\bin;C:\Program Files (x86)\TortoiseHg\;C:\Program Files (x86)\CVSNT \;c:\root\bin;.;c:\root/bin;;c:\root/lib;c:\root/cint/cint/stl, or has wrong file extension (.dll) cl : Command line warning D9035 : option 'o' has been deprecated and will be rem oved in a future release cl : Command line warning D9035 : option 'o' has been deprecated and will be rem oved in a future release cl : Command line warning D9002 : ignoring unknown option '-ignore:4049,4075,408 9,4217,4221' cl : Command line warning D9002 : ignoring unknown option '-incremental:no' cl : Command line warning D9002 : ignoring unknown option '-debug' cl : Command line warning D9002 : ignoring unknown option '-nodefaultlib:msvcrt. ...

Thanks in advance!!

2

Hi,

creating a TApplication object should fix it.

Cheers, Axel.

3

I’m writing a library. Is there any way for me to tell if the TApplication object is already initalized? Or does it matter if two of them get initalized?

4

Hi,

Look at the value of gApplication.

Cheers,
Philippe.

5

Duh! Thanks!

6

Ok, doing a “new TApplication” does fix the problem.

However, checking first to see if gApplication is 0 doesn’t work - it is not null in the code. So, I still need to do the new TApplication. Perhaps some other check? Or it doesn’t matter if new TApplication is run twice?

Cheers, Gordon.

7

Ok. This is what I should be doing (at least, this is what I found in other code in ROOT) to init the app:

TApplication::CreateApplication();

And that has an internal check of some sort. More importantly, it seems to work well. :slight_smile: