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ALPR install: fix lxml build failure on ARM by adding libxml2/libxslt dev deps and pinning lxml for Py3.8 #22

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ALPR install: fix lxml build failure on ARM by adding libxml2/libxslt dev deps and pinning lxml for Py3.8 #22

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31 changes: 31 additions & 0 deletions install.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -43,8 +43,23 @@ if [ "${systemName}" = "Raspberry Pi" ] || [ "${systemName}" = "Orange Pi" ] ||
installAptPackages "libatlas-base-dev libopenblas-dev libblas-dev"
installAptPackages "liblapack-dev patchelf gfortran"

# Fix for lxml build failures on aarch64 when installing PaddleOCR dependencies.
# lxml>=5/6 may be built from source if no wheel is available on the mirror.
# Ensure system headers exist so a source build can succeed, and preinstall a
# compatible binary lxml for Python 3.8 to avoid building from source.
installAptPackages "libxml2-dev libxslt1-dev zlib1g-dev pkg-config"

if [ "$oneStepPIP" = false ]; then
installPythonPackagesByName "Cython six requests wheel pyyaml"
# Prefer a prebuilt wheel for Python 3.8 to avoid source builds on aarch64 mirrors.
if [ "${pythonVersion}" = "3.8" ]; then
installPythonPackagesByName "lxml==4.9.4" "lxml XML/HTML parser (preinstalled to avoid source build)"
fi
else
# When doing one-step pip, still try to mitigate lxml builds for Py3.8
if [ "${pythonVersion}" = "3.8" ]; then
installPythonPackagesByName "lxml==4.9.4" "lxml XML/HTML parser (preinstalled to avoid source build)"
fi
fi

"$venvPythonCmdPath" -m pip show paddlepaddle >/dev/null 2>/dev/null
Expand All @@ -69,6 +84,17 @@ if [ "${systemName}" = "Raspberry Pi" ] || [ "${systemName}" = "Orange Pi" ] ||

elif [ "${systemName}" = "Jetson" ]; then

# Ensure system headers for lxml in case a source build is needed by PaddleOCR deps
write "Ensuring system headers for lxml are present..." $color_info
sudo apt-get update -y >/dev/null 2>/dev/null
installAptPackages "libxml2-dev libxslt1-dev zlib1g-dev pkg-config"
writeLine "Done" $color_success

# For Python 3.8 on Jetson, preinstall a binary lxml to avoid building from source on aarch64
if [ "${pythonVersion}" = "3.8" ]; then
installPythonPackagesByName "lxml==4.9.4" "lxml XML/HTML parser (preinstalled to avoid source build)"
fi

case "$pythonVersion" in
"3.6")
wheel_file="paddlepaddle_gpu-2.4.1-cp36-cp36m-linux_aarch64.whl"
Expand Down Expand Up @@ -159,6 +185,11 @@ if [ "$os" = "macos" ]; then
else
installPythonPackagesByName "opencv-python" "OpenCV, the Computer Vision library for Python"
fi

# Preinstall lxml to avoid source builds on macOS if PaddleOCR pulls it in
if [ "${pythonVersion}" = "3.8" ]; then
installPythonPackagesByName "lxml==4.9.4" "lxml XML/HTML parser (preinstalled to avoid source build)"
fi
fi

if [ "${moduleInstallErrors}" = "" ]; then
Expand Down