Problem when creating dictionary in Osx 12.7, Xcode 14.2

[atolosadelgado]

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Description

Dear experts,

The tutorial that shows how to create a dictionary root-master/tutorials/tree/dictionary do not compile in newer versions of Osx / Xcode. The error happens during the configuration:

cmake .. -G Xcode 
-- The C compiler identification is AppleClang 14.0.0.14000029
-- The CXX compiler identification is AppleClang 14.0.0.14000029
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done (12.8s)
-- Generating done (0.0s)
CMake Error in CMakeLists.txt:
  The custom command generating

    /Users/agramunt/Downloads/root-master/tutorials/tree/dictionary/xcode/G__data2Tree.cxx

  is attached to multiple targets:

    G__data2Tree
    data2TreeLib

  but none of these is a common dependency of the other(s).  This is not
  allowed by the Xcode "new build system".


CMake Generate step failed.  Build files cannot be regenerated correctly.

Reproducer

Try to compile the tutorial root-master/tutorials/tree/dictionary

ROOT version

fails with several versions in the same manner

------------------------------------------------------------------
  | Welcome to ROOT 6.26/14                        https://root.cern |
  | (c) 1995-2021, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for macosx64 on Nov 28 2023, 00:39:39                      |
  | From tags/v6-26-14@v6-26-14                                      |
  | With Apple clang version 14.0.0 (clang-1400.0.29.202)            |
  | Try '.help', '.demo', '.license', '.credits', '.quit'/'.q'       |
   ------------------------------------------------------------------

Installation method

pre-built binary

Operating system

MacOS

Additional context

No response

[dpiparo]

Hi, I cannot reproduce.
If I follow the instructions in the readme (below point 1 and 2 together) the example configures, builds and runs fine: perhaps I am missing something?

cmake -B build -S . 
cmake --build build 
./build/treeExample

outputs

-> cmake -B build -S .
-- The C compiler identification is AppleClang 15.0.0.15000040
-- The CXX compiler identification is AppleClang 15.0.0.15000040
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Vdt: /foo/bar/baz (found version "0.4") 
-- Configuring done (6.9s)
-- Generating done (0.1s)
-- Build files have been written to: /foo/bar/eggs/build/tutorials/tree/dictionary/build

-> cmake --build build 
[ 11%] Generating G__data2Tree.cxx, libdata2Tree_rdict.pcm, libdata2Tree.rootmap
[ 22%] Building CXX object CMakeFiles/data2TreeLib.dir/data2Tree.cxx.o
[ 33%] Building CXX object CMakeFiles/data2TreeLib.dir/G__data2Tree.cxx.o
[ 44%] Linking CXX shared library libdata2TreeLib.dylib
[ 44%] Built target data2TreeLib
[ 55%] Building CXX object CMakeFiles/treeExample.dir/main.cpp.o
[ 66%] Building CXX object CMakeFiles/treeExample.dir/writeTree.cxx.o
[ 77%] Building CXX object CMakeFiles/treeExample.dir/readTree.cxx.o
[ 88%] Building CXX object CMakeFiles/treeExample.dir/readTreeDF.cxx.o
[100%] Linking CXX executable treeExample
[100%] Built target treeExample

-> ./build/treeExample
Starting writeTree()...
******************************************************************************
*Tree    :myTree    :                                                        *
*Entries :       10 : Total =            8451 bytes  File  Size =          0 *
*        :          : Tree compression factor =   1.00                       *
<snip>

[atolosadelgado]

Hi,

thanks for checking it! Could you try with the cmake builder for Xcode,

cmake -G Xcode -B build -S . 
cmake --build build 
./build/treeExample

[vepadulano]

@atolosadelgado I can reproduce it (and many more similar errors) using the XCode generator. We need to investigate if this is possible to fix at all within our current build system. Would you perhaps know a bit more about why it behaves differently from traditional ones (e.g. Unix Makefiles, Ninja)?

[atolosadelgado]

It is fixed, I am opening a PR right now :)
Edit: here it is the PR #14619

[vepadulano]

Thank you for the PR! I want to try it out on my Mac, but I never get to that same error actually, I am greeted by this one much before that (and multiple times)

CMake Error in core/clingutils/CMakeLists.txt:
  The custom command generating

    /Users/vpadulan/Programs/rootproject/rootbuild/gh-14595-minimal/core/clingutils/dummy.cxx

  is attached to multiple targets:

    vectorDict
    listDict
    forward_listDict
    dequeDict
    mapDict
    map2Dict
    unordered_mapDict
    multimapDict
    multimap2Dict
    unordered_multimapDict
    setDict
    unordered_setDict
    multisetDict
    unordered_multisetDict
    complexDict
    valarrayDict

  but none of these is a common dependency of the other(s).  This is not
  allowed by the Xcode "new build system".

Did you not get this error as well? That would be surprising

[github-actions]

Hi @vepadulano, @dpiparo,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖

[github-actions]

Hi @vepadulano, @dpiparo,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖

[github-actions]

Hi @vepadulano, @dpiparo,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖

[github-actions]

Hi @vepadulano, @dpiparo,

It appears this issue is closed, but wasn't yet added to a project. Please add upcoming versions that will include the fix, or 'not applicable' otherwise.

Sincerely,
🤖