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macro(_find_file_in_dirs VAR NAME DIRS)
find_path(${VAR} ${NAME} ${DIRS} NO_DEFAULT_PATH)
set(${VAR} ${${VAR}}/${NAME})
unset(${VAR} CACHE)
endmacro()
if(WITH_LAPACK)
ocv_update(LAPACK_IMPL "Unknown")
if(NOT LAPACK_LIBRARIES)
include(cmake/OpenCVFindMKL.cmake)
if(HAVE_MKL)
set(LAPACK_INCLUDE_DIR ${MKL_INCLUDE_DIRS})
set(LAPACK_LIBRARIES ${MKL_LIBRARIES} )
set(LAPACK_CBLAS_H "mkl_cblas.h" )
set(LAPACK_LAPACKE_H "mkl_lapack.h" )
set(LAPACK_IMPL "MKL")
endif()
endif()
if(NOT LAPACK_LIBRARIES)
include(cmake/OpenCVFindOpenBLAS.cmake)
if(OpenBLAS_FOUND)
set(LAPACK_INCLUDE_DIR ${OpenBLAS_INCLUDE_DIR} )
set(LAPACK_LIBRARIES ${OpenBLAS_LIB} )
set(LAPACK_CBLAS_H "cblas.h" )
set(LAPACK_LAPACKE_H "lapacke.h" )
set(LAPACK_IMPL "OpenBLAS")
endif()
endif()
if(NOT LAPACK_LIBRARIES AND UNIX)
include(cmake/OpenCVFindAtlas.cmake)
if(ATLAS_FOUND)
set(LAPACK_INCLUDE_DIR ${Atlas_INCLUDE_DIR})
set(LAPACK_LIBRARIES ${Atlas_LIBRARIES} )
set(LAPACK_CBLAS_H "cblas.h" )
set(LAPACK_LAPACKE_H "lapacke.h" )
set(LAPACK_IMPL "Atlas")
endif()
endif()
if(NOT LAPACK_LIBRARIES AND APPLE)
set(LAPACK_INCLUDE_DIR "Accelerate")
set(LAPACK_LIBRARIES "-framework Accelerate")
set(LAPACK_CBLAS_H "cblas.h" )
set(LAPACK_LAPACKE_H "lapacke.h" )
set(LAPACK_IMPL "Apple")
endif()
set(LAPACK_INCLUDE_DIR ${LAPACK_INCLUDE_DIR} CACHE PATH "Path to BLAS include dir" FORCE)
set(LAPACK_CBLAS_H ${LAPACK_CBLAS_H} CACHE STRING "Alternative name of cblas.h" FORCE)
set(LAPACK_LAPACKE_H ${LAPACK_LAPACKE_H} CACHE STRING "Alternative name of lapacke.h" FORCE)
set(LAPACK_LIBRARIES ${LAPACK_LIBRARIES} CACHE STRING "Names of BLAS & LAPACK binaries (.so, .dll, .a, .lib)" FORCE)
set(LAPACK_IMPL ${LAPACK_IMPL} CACHE STRING "Lapack implementation id" FORCE)
if(LAPACK_LIBRARIES) #adding proxy cblas.h header
message(STATUS "LAPACK_IMPL: ${LAPACK_IMPL}, LAPACK_LIBRARIES: ${LAPACK_LIBRARIES}")
if("${LAPACK_IMPL}" STREQUAL "Apple")
set(CBLAS_H_PATH "Accelerate/Accelerate.h")
set(LAPACKE_H_PATH "Accelerate/Accelerate.h")
else()
_find_file_in_dirs(CBLAS_H_PATH "${LAPACK_CBLAS_H}" "${LAPACK_INCLUDE_DIR}")
_find_file_in_dirs(LAPACKE_H_PATH "${LAPACK_LAPACKE_H}" "${LAPACK_INCLUDE_DIR}")
endif()
if(NOT CBLAS_H_PATH OR NOT LAPACKE_H_PATH)
message(WARNING "CBLAS/LAPACK headers are not found in '${LAPACK_INCLUDE_DIR}'")
endif()
ocv_include_directories(${LAPACK_INCLUDE_DIR})
list(APPEND OPENCV_LINKER_LIBS ${LAPACK_LIBRARIES})
set(HAVE_LAPACK 1)
set(CBLAS_H_PROXY_PATH ${CMAKE_BINARY_DIR}/opencv_lapack.h)
set(_include_str "\#include \"${CBLAS_H_PATH}\"")
if("${CBLAS_H_PATH}" STREQUAL "${LAPACKE_H_PATH}")
else()
set(_include_str "${_include_str}\n\#include \"${LAPACKE_H_PATH}\"")
endif()
file(WRITE ${CBLAS_H_PROXY_PATH} ${_include_str})
endif()
endif()
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