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Pyside6 #197

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fbcbd32
PySide6 fixes.
richardssam Jan 25, 2026
4c47d07
Adding the build_pyside6 borrowed from openrv.
richardssam Jan 26, 2026
e165213
More fixes for pyside6 on osx.
richardssam Jan 26, 2026
d6d9d44
ffmpeg attribute rename.
richardssam Jan 26, 2026
69500d9
Missing requirement for PySide6 build.
richardssam Jan 26, 2026
47b9eb9
Used by the make_pyside6.py code.
richardssam Jan 26, 2026
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142 changes: 142 additions & 0 deletions cmake/BuildPySide6.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,142 @@
include(FetchContent)

# URL and Hash for PySide6 6.5.3 matching OpenRV
FetchContent_Declare(
pyside6_source
URL https://mirrors.ocf.berkeley.edu/qt/official_releases/QtForPython/pyside6/PySide6-6.5.3-src/pyside-setup-everywhere-src-6.5.3.zip
URL_HASH MD5=515d3249c6e743219ff0d7dd25b8c8d8
PATCH_COMMAND sed -i.bak "s/check_allowed_python_version()/# check_allowed_python_version()/" setup.py
)

# FetchContent_MakeAvailable(pyside6_source) # This adds it as subproject which we don't want

FetchContent_GetProperties(pyside6_source)
if(NOT pyside6_source_POPULATED)
FetchContent_Populate(pyside6_source)
endif()

# We install PySide6 into a local directory in the build tree
set(PYSIDE6_INSTALL_DIR ${CMAKE_BINARY_DIR}/python)
# Ensure this directory exists
file(MAKE_DIRECTORY ${PYSIDE6_INSTALL_DIR})

# We need to find the root of Qt installation to pass to the script
# Qt6_DIR points to lib/cmake/Qt6. Use cmake path command to traverse up.
# or simply assume standard layout if we can't deduce it.
# Actually make_pyside6.py expects --qt-dir to contain bin/qtpaths.
# If Qt6_DIR is .../lib/cmake/Qt6, then root is .../../../..
get_filename_component(_qt6_lib_cmake_dir ${Qt6_DIR} DIRECTORY) # .../lib/cmake
get_filename_component(_qt6_lib_dir ${_qt6_lib_cmake_dir} DIRECTORY) # .../lib
get_filename_component(_qt6_root_dir ${_qt6_lib_dir} DIRECTORY) # .../ (root)

# Check if qtpaths exists there to be sure
if(EXISTS "${_qt6_root_dir}/bin/qtpaths" OR EXISTS "${_qt6_root_dir}/bin/qtpaths.exe")
set(QT_ROOT_DIR ${_qt6_root_dir})
else()
# It might be in a different layout (e.g. system install vs local install)
# Qt6_DIR usually works.
message(STATUS "Could not deduce Qt root from Qt6_DIR=${Qt6_DIR}. Probing...")
# Try finding qtpaths directly
find_program(QTPATHS_EXECUTABLE NAMES qtpaths qtpaths6 HINTS ${_qt6_root_dir}/bin)
if (QTPATHS_EXECUTABLE)
get_filename_component(_qtpaths_dir ${QTPATHS_EXECUTABLE} DIRECTORY)
get_filename_component(QT_ROOT_DIR ${_qtpaths_dir} DIRECTORY)
else()
message(FATAL_ERROR "Could not find qtpaths executable. PySide6 build requires it.")
endif()
endif()

message(STATUS "Building PySide6 6.5.3 using Qt from ${QT_ROOT_DIR}")

# We predict the location of the libraries based on the install structure.
# setup.py install usually goes to lib/pythonX.Y/site-packages
set(PYTHON_SITE_PACKAGES "lib/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages")
# Use Python3_VERSION if Python_VERSION is not set (sometimes FindPython3 is used)
if (NOT Python_VERSION_MAJOR AND Python3_VERSION_MAJOR)
set(PYTHON_SITE_PACKAGES "lib/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages")
endif()

set(PYSIDE6_LIB_DIR "${PYSIDE6_INSTALL_DIR}/${PYTHON_SITE_PACKAGES}/PySide6")
set(SHIBOKEN6_LIB_DIR "${PYSIDE6_INSTALL_DIR}/${PYTHON_SITE_PACKAGES}/shiboken6")

message(STATUS "BuildPySide6: Expecting output at ${PYSIDE6_LIB_DIR}")


# Library extension
if(APPLE)
set(LIB_EXT ".dylib")
set(SHARED_LIB_EXT ".so") # Python modules are .so
set(PYSIDE6_LIB_NAME "libpyside6.abi3.6.5${LIB_EXT}")
set(SHIBOKEN6_LIB_NAME "libshiboken6.abi3.6.5${LIB_EXT}")
elseif(UNIX)
set(LIB_EXT ".so")
set(PYSIDE6_LIB_NAME "libpyside6.abi3${LIB_EXT}")
set(SHIBOKEN6_LIB_NAME "libshiboken6.abi3${LIB_EXT}")
elseif(WIN32)
set(LIB_EXT ".lib")
set(PYSIDE6_LIB_NAME "pyside6.lib") # verify windows names
set(SHIBOKEN6_LIB_NAME "shiboken6.lib")
endif()

# Define the custom command to build PySide6
add_custom_command(
OUTPUT ${PYSIDE6_LIB_DIR}/__init__.py
${PYSIDE6_LIB_DIR}/${PYSIDE6_LIB_NAME}
${SHIBOKEN6_LIB_DIR}/${SHIBOKEN6_LIB_NAME}
COMMAND ${Python_EXECUTABLE} ${CMAKE_SOURCE_DIR}/src/build/make_pyside6.py
--prepare
--build
--source-dir ${pyside6_source_SOURCE_DIR}
--qt-dir ${QT_ROOT_DIR}
--python-executable ${Python_EXECUTABLE}
--temp-dir ${CMAKE_BINARY_DIR}/pyside6_build_temp
--variant ${CMAKE_BUILD_TYPE}
--output-dir ${PYSIDE6_INSTALL_DIR}
COMMAND ${CMAKE_COMMAND} -E create_symlink ../shiboken6/${SHIBOKEN6_LIB_NAME} ${PYSIDE6_LIB_DIR}/${SHIBOKEN6_LIB_NAME}
COMMENT "Building PySide6 6.5.3 to ${PYSIDE6_LIB_DIR}..."
VERBATIM
)

# Use checking __init__.py as marker for existence
add_custom_target(pyside6_local_build ALL DEPENDS ${PYSIDE6_LIB_DIR}/__init__.py)

# PySide6 Target

add_library(PySide6::pyside6 SHARED IMPORTED GLOBAL)
set_target_properties(PySide6::pyside6 PROPERTIES
IMPORTED_LOCATION "${PYSIDE6_LIB_DIR}/${PYSIDE6_LIB_NAME}"
INTERFACE_INCLUDE_DIRECTORIES "${PYSIDE6_LIB_DIR}/include"
)
add_dependencies(PySide6::pyside6 pyside6_local_build)

set(SHIBOKEN6_GENERATOR_INCLUDE_DIR "${PYSIDE6_INSTALL_DIR}/${PYTHON_SITE_PACKAGES}/shiboken6_generator/include")

# Shiboken6 Target
add_library(Shiboken6::libshiboken SHARED IMPORTED GLOBAL)
set_target_properties(Shiboken6::libshiboken PROPERTIES
IMPORTED_LOCATION "${SHIBOKEN6_LIB_DIR}/${SHIBOKEN6_LIB_NAME}"
INTERFACE_INCLUDE_DIRECTORIES "${SHIBOKEN6_LIB_DIR}/include;${SHIBOKEN6_GENERATOR_INCLUDE_DIR}"
)
add_dependencies(Shiboken6::libshiboken pyside6_local_build)

# Set variables used by downstream (legacy support if targets aren't enough)
set(PySide6_INCLUDE_DIR "${PYSIDE6_LIB_DIR}/include")
set(SHIBOKEN6_INCLUDE_DIRS "${SHIBOKEN6_LIB_DIR}/include")
set(PySide6_LIBRARIES PySide6::pyside6)
set(Shiboken6_LIBRARIES Shiboken6::libshiboken)

# Ensure these directories exist so CMake doesn't complain about non-existent include paths
# They will be populated during the build step.
file(MAKE_DIRECTORY "${PySide6_INCLUDE_DIR}")
file(MAKE_DIRECTORY "${SHIBOKEN6_INCLUDE_DIRS}")
file(MAKE_DIRECTORY "${SHIBOKEN6_GENERATOR_INCLUDE_DIR}")

# Install PySide6 and Shiboken6 into the app bundle Resources/python/lib
if(APPLE)
install(DIRECTORY "${PYSIDE6_INSTALL_DIR}/${PYTHON_SITE_PACKAGES}/PySide6"
DESTINATION Resources/python/lib)
install(DIRECTORY "${PYSIDE6_INSTALL_DIR}/${PYTHON_SITE_PACKAGES}/shiboken6"
DESTINATION Resources/python/lib)
# Explicitly install __init__.py to ensure it is present
install(FILES "${PYSIDE6_LIB_DIR}/__init__.py" DESTINATION Resources/python/lib/PySide6)
endif()
11 changes: 8 additions & 3 deletions src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -76,11 +76,16 @@ endif ()
if (BUILD_PYSIDE_WIDGETS)

cmake_policy(SET CMP0148 OLD) # shiboken uses deprecated FindPythonInterp
find_package(Shiboken6 QUIET)
find_package(PySide6 QUIET)

# We build PySide6 locally to ensure version compatibility
include("${CMAKE_CURRENT_SOURCE_DIR}/../cmake/BuildPySide6.cmake")

# Manually set FOUND variables so downstream logic works
set(Shiboken6_FOUND TRUE)
set(PySide6_FOUND TRUE)

if (INSTALL_PYTHON_MODULE AND Shiboken6_FOUND AND PySide6_FOUND)
message("PySide6 and Shiboken6 packages found. Adding PySide6 demo to targets!")
message("PySide6 and Shiboken6 are being built locally. Adding PySide6 demo to targets!")
add_src_and_test_always(pyside6_module)
add_src_and_test_always(demos/pyside_demo)
else()
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