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Enforce TBB threading for DNN library #220

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Merged
aobolensk merged 1 commit into from
Nov 2, 2025
Merged

Enforce TBB threading for DNN library #220

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2 changes: 2 additions & 0 deletions 3rdparty/CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
add_subdirectory(googletest)

set(DNNL_CPU_RUNTIME "TBB" CACHE STRING "oneDNN CPU threading runtime")

add_subdirectory(oneDNN)

# Unified TBB Configuration
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2 changes: 2 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,8 @@ enable_testing()

include_directories("include")

list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")

add_subdirectory(3rdparty)

include(cmake/opencv_config.cmake)
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27 changes: 27 additions & 0 deletions cmake/FindTBB.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
# Lightweight FindTBB to reuse vendored TBB target from this project

if(TARGET TBB::tbb)
set(_vendor_tbb_include "${CMAKE_SOURCE_DIR}/3rdparty/TBB/include")
if(EXISTS "${_vendor_tbb_include}/oneapi/tbb/version.h")
# TBB::tbb is an ALIAS; set properties on the real target 'tbb'
if(TARGET tbb)
set_target_properties(tbb PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${_vendor_tbb_include}")
endif()
endif()
set(TBB_FOUND TRUE)
# Provide minimal compatibility variables
set(TBB_IMPORTED_TARGETS TBB::tbb)
mark_as_advanced(TBB_FOUND)
unset(_vendor_tbb_include)
return()
endif()

# Create an imported INTERFACE target that links to our vendored TBB build target
add_library(TBB::tbb INTERFACE IMPORTED)
set_target_properties(TBB::tbb PROPERTIES
INTERFACE_LINK_LIBRARIES tbb
INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_SOURCE_DIR}/3rdparty/TBB/include"
)
set(TBB_FOUND TRUE)
set(TBB_IMPORTED_TARGETS TBB::tbb)
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