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Add option to build the library using the python's torch installation #3004

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Add option to build the library using the python's torch installation #3004

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14 changes: 14 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -1,9 +1,11 @@
cmake_minimum_required(VERSION 3.1)
cmake_policy(SET CMP0074 NEW)
project(torchvision)
set(CMAKE_CXX_STANDARD 14)
set(TORCHVISION_VERSION 0.7.0)

option(WITH_CUDA "Enable CUDA support" OFF)
option(USE_PYTHON_TORCH "Use python installation of torch" OFF)

if(WITH_CUDA)
enable_language(CUDA)
Expand All @@ -14,6 +16,18 @@ endif()

find_package(Python3 COMPONENTS Development)

if(USE_PYTHON_TORCH)
execute_process(COMMAND python3 -c "import torch; print(torch.__file__)"
RESULT_VARIABLE COMMAND_RESULT
OUTPUT_VARIABLE PYTORCH_INIT_FILE
ERROR_VARIABLE PYTHON_ERROR)
if(NOT ${COMMAND_RESULT} STREQUAL "0")
message(FATAL_ERROR "Failed to find Python's torch module.\n${PYTHON_ERROR}")
endif()
get_filename_component(Torch_ROOT ${PYTORCH_INIT_FILE} DIRECTORY)
message(STATUS "Using Python's torch installation located at ${Torch_ROOT}")
endif()

find_package(Torch REQUIRED)
find_package(PNG REQUIRED)
find_package(JPEG REQUIRED)
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