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chore: import upstream snapshot with attribution
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CMake

# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Adding a custom target to the all target requires passing the "ALL" keyword to the initial call.
# We use this variable so we can conditionally add the keyword based on the build options.
if(${TRT_BUILD_PYTHON_STANDALONE_WHEELS})
set(ENABLE_ALL "ALL")
else()
set(ENABLE_ALL "")
endif()
add_custom_target(tensorrt_libs_wheels ${ENABLE_ALL})
# \brief Creates a target named tensorrt_libs_wheel_${moduleName} which will build the Standalone Libs Wheel for that module.
#
# \details The wheel is created by expanding all template files (from this directory) into the per-module build directory.
# Then, the relevant TRT libraries (e.g. libnvinfer.so) are copied into the same directory as the generated files.
# Finally, the wheel is built by running setup.py with the appropriate arguments in the binary directory.
#
# \param moduleName The module name to create the libs wheel for. One of "tensorrt", "tensorrt_dispatch", or "tensorrt_lean".
function(buildLibsWheel moduleName)
set(filesTarget trt_wheel_files_libs_${moduleName})
set(wheelTemplateFiles
tensorrt_libs/__init__.py
LICENSE.txt
pyproject.toml
)
# Expands all template files for the libs for the target module. The python version is unused (and set to 0).
# File paths starting with "tensorrt_libs/" are expanded into "${moduleName}_libs/".
processWheelTemplates(libs ${moduleName} 0 ${wheelTemplateFiles})
copyTRTBuildBackend()
# Determine which targets are packed into the wheel.
if(${moduleName} STREQUAL "tensorrt_dispatch")
set(moduleLibraryTargets tensorrt_dispatch_runtime)
elseif(${moduleName} STREQUAL "tensorrt_lean")
set(moduleLibraryTargets tensorrt_lean_runtime)
if(${TRT_BUILD_PLUGINS})
list(APPEND moduleLibraryTargets tensorrt_vc_plugins)
endif()
elseif(${moduleName} STREQUAL "tensorrt" OR ${moduleName} STREQUAL "tensorrt_rtx")
set(moduleLibraryTargets tensorrt)
get_all_fatbin_archs(KLIB_ARCHS KLIB_ARCHS_CROSS)
if(NOT ${TRT_BUILD_WINML})
if(NOT ${TRT_BUILD_SPLIT_KLIB})
list(APPEND moduleLibraryTargets tensorrt_builder_resource)
else()
foreach(ARCH IN LISTS KLIB_ARCHS)
list(APPEND moduleLibraryTargets tensorrt_builder_resource_${ARCH})
endforeach()
endif()
endif()
if(${TRT_BUILD_PLUGINS})
list(APPEND moduleLibraryTargets tensorrt_plugins)
endif()
if(${TRT_BUILD_ONNX_PARSER})
list(APPEND moduleLibraryTargets nvonnxparser)
endif()
if(NOT ${TRT_BUILD_SKIP_WIN_BUILDER_RESOURCE})
foreach(ARCH IN LISTS KLIB_ARCHS_CROSS)
list(APPEND moduleLibraryTargets tensorrt_builder_resource_win_${ARCH})
endforeach()
endif()
else()
message(FATAL_ERROR "Unknown module name: ${moduleName}. Expected 'tensorrt', 'tensorrt_dispatch', or 'tensorrt_lean'.")
endif()
# copy_standalone_libs.py needs a space-separated string of the files to copy.
set(moduleLibraryPaths "")
foreach(tgt IN LISTS moduleLibraryTargets)
list(APPEND moduleLibraryPaths "$<TARGET_FILE:${tgt}>")
endforeach()
string(JOIN " " moduleLibraryFiles ${moduleLibraryPaths})
# CMake needs a list of files output by the custom command.
# But it needs it at configure time, so we can't use generator expressions here.
set(moduleLibraryOutputFiles)
foreach(tgt IN LISTS moduleLibraryTargets)
# Get the library filename (configure time)
get_target_property(lib_name ${tgt} OUTPUT_NAME)
if(NOT lib_name)
set(lib_name ${tgt})
endif()
# Add extension based on platform
if(MSVC)
set(lib_filename "${lib_name}${CMAKE_SHARED_LIBRARY_SUFFIX}")
else()
set(lib_filename "${CMAKE_SHARED_LIBRARY_PREFIX}${lib_name}${CMAKE_SHARED_LIBRARY_SUFFIX}")
endif()
# Add to output files list
list(APPEND moduleLibraryOutputFiles "${generatedFileOutDir}/${moduleName}_libs/${lib_filename}")
endforeach()
# ARM Linux requires that we specify the page size for the patchelf call.
if(${TRT_BUILD_PLATFORM} STREQUAL ${TRT_PLATFORM_AARCH64})
set(pageSizeArgs "--page-size=65536")
else()
set(pageSizeArgs "")
endif()
# Copies the TRT libraries (nvinfer.so, nvinfer_dispatch.so, etc) into the same directory as the generated files.
add_custom_command(
OUTPUT ${moduleLibraryOutputFiles}
COMMAND
${Python3_EXECUTABLE} ${TensorRT_SOURCE_DIR}/scripts/wheel/copy_standalone_libs.py
--update
--follow-symlinks
--mode=$<CONFIG>
${pageSizeArgs}
--build-dir=${CMAKE_LIBRARY_OUTPUT_DIRECTORY} # Since we give absolute paths, this is mostly unused, but we'll keep it for consistency.
--output=${generatedFileOutDir}/${moduleName}_libs/
--trim-version
${moduleLibraryPaths}
COMMENT "Copying TRT libraries for ${moduleName} to ${generatedFileOutDir}/${moduleName}_libs/"
DEPENDS ${moduleLibraryTargets}
VERBATIM
)
# Creates a new custom target, and makes trt_standalone_wheel_files depend on the new target.
add_custom_target(${filesTarget} DEPENDS ${generatedWheelFiles} ${moduleLibraryOutputFiles} ${copiedBuildBackend})
get_wheel_platform(TRUE wheelPlatform)
# Define the output directory for the wheel
set(wheelOutDir ${TRT_WHEEL_OUTPUT_DIR}/libs)
set(wheelOutputFile ${wheelOutDir}/${moduleName}_cu${CUDAToolkit_VERSION_MAJOR}_libs-${TensorRT_PACKAGE_VERSION}-py3-none-${wheelPlatform}.whl)
# Add a custom command to build the wheel using PEP 517 compliant build frontend.
# The custom tensorrt_build_backend handles wheel tag customization via config settings.
add_custom_command(
OUTPUT ${wheelOutputFile}
COMMAND ${CMAKE_COMMAND} -E env ${TRT_PACKAGING_ENV}
${Python3_EXECUTABLE} -m build --wheel --no-isolation
--config-setting=--quiet
--config-setting=python-tag=py3
--config-setting=plat-name=${wheelPlatform}
--outdir ${wheelOutDir}
WORKING_DIRECTORY ${generatedFileOutDir}
COMMENT "Building wheel for ${moduleName}"
DEPENDS ${filesTarget} trt_packaging_requirements_installed
VERBATIM
)
set(wheelTarget tensorrt_libs_wheel_${moduleName})
# Add a custom target for the wheel
add_custom_target(
${wheelTarget}
${ENABLE_ALL}
DEPENDS ${wheelOutputFile}
)
add_dependencies(tensorrt_libs_wheels ${wheelTarget})
# Standalone wheels are only published to the internal tarfile as they are released separately.
install(FILES
${wheelOutputFile}
DESTINATION python_standalone
COMPONENT internal
OPTIONAL
)
endfunction()
foreach(moduleName IN LISTS TRT_PYTHON_MODULE_NAMES)
buildLibsWheel(${moduleName})
endforeach()
add_dependencies(tensorrt_python_wheels tensorrt_libs_wheels)