Clang++: error: linker command failed with exit code 1 (use -v to see invocation)

[David_Rapagnani]

_Geant4 Version:_geant4-v11.1.3
_Operating System:_Sonoma14.5
_Compiler/Version:_Clang 18.1.6
_CMake Version:_3.29.3

---

Hi,

I’m getting this error and would like not to. Any help?

[ 1%] No install step for ‘G4ENSDFSTATE’
[ 1%] Completed ‘G4ENSDFSTATE’
[ 1%] Built target G4ENSDFSTATE
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/TaskGroup.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/TaskRunManager.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/ThreadData.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/ThreadPool.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/Threading.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/Timer.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/UserTaskQueue.cc.o
[ 1%] Building CXX object source/externals/ptl/src/CMakeFiles/ptl-shared.dir/VUserTaskQueue.cc.o
[ 1%] Linking CXX shared library …/…/…/…/BuildProducts/lib/libG4ptl.dylib
Undefined symbols for architecture arm64:
“std::exception_ptr::__from_native_exception_pointer(void*)”, referenced from:
std::__1::promise::~promise() in UserTaskQueue.cc.o
“___cxa_init_primary_exception”, referenced from:
std::__1::promise::~promise() in UserTaskQueue.cc.o
ld: symbol(s) not found for architecture arm64
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [BuildProducts/lib/libG4ptl.2.3.3.dylib] Error 1
make[1]: *** [source/externals/ptl/src/CMakeFiles/ptl-shared.dir/all] Error 2
make: *** [all] Error 2

[bmorgan]

I think you’re running into this issue: Compilation Failure with Clang from Brewed LLVM · Issue #169820 · Homebrew/homebrew-core · GitHub

There are some workarounds there, but it’s fundamentally to do with LLVM/Homebrew and not a Geant4 issue.

[David_Rapagnani]

Thanks. Adding

export CXXFLAGS=“-I$(brew --prefix llvm)/include”
export LDFLAGS=“-L$(brew --prefix llvm)/lib/c++”

as environmental variable solved the issue. In case it may help someone, in the same compilation I had another issues mostly related to homebrew

• about the redefinition of fdopen in /geant4-v11.1.3/source/externals/zlib/include/zutil.h:146. It was enough wrapping it as

#if defined(APPLE)
#include <stdio.h>
#else
#ifndef fdopen
#define fdopen(fd,mode) NULL /* No fdopen() */
#endif
#endif

• qt class redifinition
  geant4-v11.1.3/source/interfaces/basic/include/G4UIQt.hh:54:7: error: definition of type 'QStringList

was solved by commenting out that line

I am struggling with latest (hopefully) error again due to Qt

• qt templates - e.g. /opt/homebrew/Cellar/qt@5/5.15.13_1/lib/QtCore.framework/Headers/qobject.h:305:43: error: no template named ‘QStaticSlotObject’ in namespace ‘QtPrivate’
  305 | new QtPrivate::QStaticSlotObject<Func2,
  | ~~~~~~~~~~~^

I did set the following env

export Qt5_DIR=$(brew --prefix qt@5)/lib/cmake/Qt5
export CMAKE_INCLUDE_PATH=$(brew --prefix qt@5)/include

and added explicitly qt5 paths while building the project

-DCMAKE_PREFIX_PATH=$(brew --prefix qt@5)/lib/cmake/Qt5
-DCMAKE_INCLUDE_PATH=$(brew --prefix qt@5)/include

but the error is still there. Any idea?

[bmorgan]

Do you have the Homebrew qt (i.e. Qt6) formula installed and linked? If you do, this needs unlinking otherwise its headers will clash with those of the qt@5 formula.

I have no idea about the zlib issue, but it feels like you might need to export CFLAGS as well for this.

[David_Rapagnani]

Thanks. It looks like that the command
brew unlink qt
was enough. For the zlib, the wrapping described in the previous reply did the job. Now I can run exampleB1 smoothly.

Thanks again!