Building ROOT from source: symbol(s) not found for architecture arm64

Newbie
1

Hi, I am currently building ROOT from source, but the build fails at 100%. I get the following warning:

ld: warning: ignoring file /Users/opt/anaconda3/lib/libpython3.8.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64

Undefined symbols for architecture arm64:

(…)

ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libPyMVA.so] Error 1
make[1]: *** [tmva/pymva/CMakeFiles/PyMVA.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs…

When configuring, I use the following cmake procedure:

cmake -DCMAKE_INSTALL_PREFIX=$HOME/progs/ROOT/root-install -DPYTHIA8_DIR=$PYTHIA8 -DPYTHIA8_INCLUDE_DIR=$PYTHIA_INC -DPYTHIA8_LIBRARY=$PYTHIA8_LIB/libpythia8.a -DGSL_DIR=/usr/local -Droofit=ON -Dpythia8=ON -Dbuiltin_glew=ON -Dxroot=OFF …/root-sources

I have tried adding both DCMAKE_SYSTEM_PROCESSOR=arm64 and DCMAKE_OSX_ARCHITECTURES=arm64, but to no avail.

_ROOT Version: 6.26.10
_Platform: macOS 13.2 (M1, 16GB)
_Compiler: Xcode 14.2

2

It looks like your anaconda install is (still) for an intel cpu while it looks like you are running/building on an Apple silicon cpu. You may need to reinstall anaconda and its stack of products.

3

Thank you so much, this was the issue. It ran smoothly after reinstalling conda.