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https://github.com/pytorch/pytorch.git
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e872bf8f88
When PyTorch is built with OpenBLAS support and libopenblas is ldrectly linked with libgomp.so the libtorch_cpu.so ends up getting multiple omp runtimes linked against it. This may result in unexpected runtime behaviour /regression. This patch fixes this by avoiding linking against libomp.so if OpenBLAS is linked against libgomp.so Fixes #146603 Pull Request resolved: https://github.com/pytorch/pytorch/pull/147725 Approved by: https://github.com/albanD
93 lines
2.4 KiB
CMake
93 lines
2.4 KiB
CMake
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SET(Open_BLAS_INCLUDE_SEARCH_PATHS
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/usr/include
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/usr/include/openblas
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/usr/include/openblas-base
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/usr/local/include
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/usr/local/include/openblas
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/usr/local/include/openblas-base
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/usr/local/opt/openblas/include
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/opt/OpenBLAS/include
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$ENV{OpenBLAS_HOME}
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$ENV{OpenBLAS_HOME}/include
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$ENV{OpenBLAS_HOME}/include/openblas
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)
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SET(Open_BLAS_LIB_SEARCH_PATHS
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/lib/
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/lib/openblas-base
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/lib64/
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/usr/lib
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/usr/lib/openblas-base
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/usr/lib64
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/usr/local/lib
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/usr/local/lib64
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/usr/local/opt/openblas/lib
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/opt/OpenBLAS/lib
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$ENV{OpenBLAS}
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$ENV{OpenBLAS}/lib
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$ENV{OpenBLAS_HOME}
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$ENV{OpenBLAS_HOME}/lib
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)
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FIND_PATH(OpenBLAS_INCLUDE_DIR NAMES cblas.h PATHS ${Open_BLAS_INCLUDE_SEARCH_PATHS})
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FIND_LIBRARY(OpenBLAS_LIB NAMES openblas PATHS ${Open_BLAS_LIB_SEARCH_PATHS})
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SET(OpenBLAS_FOUND ON)
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# Check include files
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IF(NOT OpenBLAS_INCLUDE_DIR)
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SET(OpenBLAS_FOUND OFF)
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MESSAGE(STATUS "Could not find OpenBLAS include. Turning OpenBLAS_FOUND off")
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ENDIF()
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# Check libraries
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IF(NOT OpenBLAS_LIB)
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SET(OpenBLAS_FOUND OFF)
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MESSAGE(STATUS "Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off")
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ENDIF()
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IF (OpenBLAS_FOUND)
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IF (NOT OpenBLAS_FIND_QUIETLY)
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MESSAGE(STATUS "Found OpenBLAS libraries: ${OpenBLAS_LIB}")
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MESSAGE(STATUS "Found OpenBLAS include: ${OpenBLAS_INCLUDE_DIR}")
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ENDIF (NOT OpenBLAS_FIND_QUIETLY)
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ELSE (OpenBLAS_FOUND)
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IF (OpenBLAS_FIND_REQUIRED)
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MESSAGE(FATAL_ERROR "Could not find OpenBLAS")
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ENDIF (OpenBLAS_FIND_REQUIRED)
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ENDIF (OpenBLAS_FOUND)
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IF(OpenBLAS_LIB)
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# Run ldd on the OpenBLAS library
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execute_process(
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COMMAND ldd "${OpenBLAS_LIB}"
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OUTPUT_VARIABLE LDD_OUTPUT
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ERROR_VARIABLE LDD_ERROR
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RESULT_VARIABLE LDD_RESULT
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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if(NOT LDD_RESULT EQUAL 0)
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message(WARNING "ldd failed on ${OpenBLAS_LIB}: ${LDD_ERROR}")
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endif()
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# Check if the output contains "libgomp"
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string(FIND "${LDD_OUTPUT}" "libgomp" LIBGOMP_FOUND_INDEX)
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if(LIBGOMP_FOUND_INDEX GREATER -1)
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message(STATUS "OpenBLAS is directly linked against libgomp")
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set(OPENBLAS_USES_LIBGOMP TRUE CACHE BOOL "OpenBLAS uses libgomp")
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else()
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message(STATUS "OpenBLAS is not directly linked against libgomp")
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set(OPENBLAS_USES_LIBGOMP FALSE CACHE BOOL "OpenBLAS uses libgomp")
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endif()
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ENDIF(OpenBLAS_LIB)
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MARK_AS_ADVANCED(
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OpenBLAS_INCLUDE_DIR
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OpenBLAS_LIB
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OpenBLAS
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)
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