Extended character is not valid in an identifier

ROOT
1

Describe the bug

Just posting this for help for potential users encountering this issue in the future.

At some point, we were unable to run a script with the “+” compilation, ie root -l test.cpp worked, but root -l test.cpp+ failed with the following cryptic error message:

root -l test.cpp+(\"e\")
root [0] 
Processing test.cpp+("e")...
Info in <TUnixSystem::ACLiC>: creating shared library /tmp/          /tmp//tmp/./test_cpp.so
/tmp/          /tmp//tmp/test_cpp_ACLiC_dict.cxx:3:32: error: extended character   is not valid in an identifier
    3 | #define R__DICTIONARY_FILENAME dItmpdI sP sP sP dItmpdIdItmpdItest_cpp_ACLiC_dict
      |                                ^
/tmp/          /tmp//tmp/test_cpp_ACLiC_dict.cxx:3:32: error: extended character   is not valid in an identifier

Finally, we figured out that there was some kind of non-standard tab or space symbol within .rootrc’s ACLiC.BuildDir, after copying from an html file to “nano” or something like that. Removing all characters before the path and putting a new space solved the issue.

To Reproduce

Add a character such as “ to ~/.rootrc after ACLiC.BuildDir:

Setup

ROOT v6.32.04
Built for linuxx8664gcc on Aug 14 2024, 04:13:21
From tags/v6-32-04@v6-32-04
With c++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Binary directory: /opt/root/bin

Additional context

https://community.arm.com/support-forums/f/compilers-and-libraries-forum/55354/error-extended-character-2-is-not-valid-in-an-identifier

2

Dear @ferhue ,

Thanks for the post - this is indeed a useful reference.
On our side, we’ll try to deal with these special characters, e.g. replacing them with simple ones.

Cheers,
D

3

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