Is it possible to run compiled standalone application from anywhere on a system?

Cling
#1

Hi, ROOTers

I have compiled a standalone GUI application successully. However, there is a problem which I describe below.

Preliminaries

The structure of the working directory is the following

Before make 

.
├── DummyLinkDef.h
├── inc
│   ├── Dummy.h
│   └── Includes.h
├── Makefile
└── src
    ├── Dummy.cpp
    └── Main.cpp

Where make is the following lines

g++ -I./inc -c src/Dummy.cpp `root-config --cflags --glibs` 
g++ -I./inc -c src/Main.cpp `root-config --cflags --glibs`
rootcling -f Dummy.cxx inc/Dummy.h inc/Includes.h DummyLinkDef.h 
g++ -I./inc Dummy.o Main.o Dummy.cxx `root-config --cflags --glibs` -o Dummy

After make:

.
├── Dummy
├── Dummy.cxx
├── DummyLinkDef.h
├── Dummy.o
├── Dummy_rdict.pcm
├── inc
│   ├── Dummy.h
│   └── Includes.h
├── Main.o
├── Makefile
└── src
    ├── Dummy.cpp
    └── Main.cpp

The Problem

I can run Dummy executable successfully only in the working directory. However, If I add it to stanard PATH (e.g. /usr/bin) and try to execute it, say, from a directory above I get the following message:

Error in <TCling::RegisterModule>: cannot find dictionary module Dummy_rdict.pcm

However, it seems that slots, for example, work fine. Anyway my question is is there a way to run Dummy from anywhere properly?

I attach full directory if it is needed. Test.zip (2.4 KB)

#2

You probably need to copy the .pcm file to the same PATH as the binary, as the binary searches for it in the same directory. This is a restriction that started with ROOT 6.18 as far as I know (pcms have to be in the same directory as libraries or binaries that make use of them).

#3

No, it doesn’t work. I copied *.pcm to the /usr/bin/ but nothing changed. The same error. BTW, I cannot see any errors in my program. All works fine but at the start of execution I see errors:

Error in <TCling::RegisterModule>: cannot find dictionary module Dialogs_rdict.pcm
Error in <TCling::RegisterModule>: cannot find dictionary module CaenGUI_rdict.pcm

It seems it is not a problem but I don’t like mysterious errors anyway. Is it a possibility to extend the path for searching *.pcm files?

#4

It is not the same error, now you are missing other dictionaries (Dialogs_rdict.pcm and CaenGUI_rdict.pcm instead of Dummy_rdict.pcm). If the dictionaries are in the same place as their respective libraries/binaries, and you have LD_LIBRARY_PATH set to contain the path to the libraries, it should work.

1 Like
#5

Sorry for the confusion. The original post was a simple example in order to other users could reproduce the error. But I am working on a more complicated example. So the last errors are from it.

#6

Affirmative. Thank you. However, I also had to extend CPLUS_INCLUDE_PATH. Otherwise, I had errors. But I am not sure this problem is relevant here.

#7

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