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fix: install into free-threaded python3.14t/site-packages prefixes #911

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fix: install into free-threaded python3.14t/site-packages prefixes #911

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7a27a25
fix: support free-threaded python3.14t/site-packages prefixes
wdconinc Dec 29, 2025
5415b29
fix: append sys.abiflags to e.g. python3.14 in env.sh
wdconinc Dec 29, 2025
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16 changes: 15 additions & 1 deletion cmake/podioBuild.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -214,13 +214,27 @@ endif()
# Setup the python install dir. See the discussion in
# https://github.com/AIDASoft/podio/pull/599 for more details on why this is
# done the way it is
#
# For Python 3.13+ with free-threading (PEP 703), the site-packages directory
# includes a 't' suffix (e.g., python3.14t/site-packages). We use Python's
# own SITEARCH to get the correct path including any ABI suffixes.
#
set(podio_python_lib_dir lib)
if("${Python3_SITEARCH}" MATCHES "/lib64/")
set(podio_python_lib_dir lib64)
endif()

# Extract the python-specific part of the path (e.g., python3.14t/site-packages)
# from Python3_SITEARCH
string(REGEX MATCH "python[0-9]+\\.[0-9]+[a-z]*/site-packages" _python_site_subdir "${Python3_SITEARCH}")
if(NOT _python_site_subdir)
# Fallback to manual construction if regex fails
set(_python_site_subdir "python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages")
message(WARNING "Could not extract site-packages path from Python3_SITEARCH (${Python3_SITEARCH}), using fallback: ${_python_site_subdir}")
endif()

set(podio_PYTHON_INSTALLDIR
"${CMAKE_INSTALL_PREFIX}/${podio_python_lib_dir}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages"
"${CMAKE_INSTALL_PREFIX}/${podio_python_lib_dir}/${_python_site_subdir}"
CACHE STRING
"The install prefix for the python bindings and the generator and templates"
)
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2 changes: 1 addition & 1 deletion env.sh
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Expand Up @@ -25,7 +25,7 @@ elif [[ "$unamestr" = 'Darwin' ]]; then
fi
fi

python_stem=python3.$(python -c 'import sys; print(sys.version_info[1])')/site-packages
python_stem=python3.$(python -c 'import sys; print(str(sys.version_info[1]) + sys.abiflags )')/site-packages
if [ -d $PODIO/lib64/${python_stem} ]; then
if ! echo $PYTHONPATH | grep -o $PODIO/lib64/${python_stem} > /dev/null 2>&1; then
export PYTHONPATH=$PODIO/lib64/${python_stem}:$PYTHONPATH
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