message: fixed native Lapack detection script on Mac/iOS (where native Lapack is a part of Accelerate framework)
diff: @@ -31,11 +31,18 @@ macro(ocv_lapack_check)
  else()
  # adding proxy opencv_lapack.h header
  set(CBLAS_H_PROXY_PATH ${CMAKE_BINARY_DIR}/opencv_lapack.h)
  - set(_lapack_include_str "extern \"C\" {\n\#include \"${OPENCV_CBLAS_H_PATH_${_lapack_impl}}\"")
  + if(APPLE)
  + set(_lapack_include_str_extern_C "")
  + set(_lapack_include_str_extern_C_end "")
  + else()
  + set(_lapack_include_str_extern_C "extern \"C\" {\n")
  + set(_lapack_include_str_extern_C_end "}\n")
  + endif()
  + set(_lapack_include_str "${_lapack_include_str_extern_C}\#include \"${OPENCV_CBLAS_H_PATH_${_lapack_impl}}\"")
  if(NOT "${OPENCV_CBLAS_H_PATH_${_lapack_impl}}" STREQUAL "${OPENCV_LAPACKE_H_PATH_${_lapack_impl}}")
  set(_lapack_include_str "${_lapack_include_str}\n#include \"${OPENCV_LAPACKE_H_PATH_${_lapack_impl}}\"")
  endif()
  - set(_lapack_include_str "${_lapack_include_str}\n}\n")
  + set(_lapack_include_str "${_lapack_include_str}\n${_lapack_include_str_extern_C_end}")
  # update file contents (if required)
  set(__content_str "")
  if(EXISTS "${CBLAS_H_PROXY_PATH}")
  