gentoo-overlay/media-libs/opencv/files/opencv-4.5.0-link-with-cblas-for-lapack.patch

diff --git a/cmake/OpenCVFindLAPACK.cmake b/cmake/OpenCVFindLAPACK.cmake
index 342bebc..9ebd206 100644
--- a/cmake/OpenCVFindLAPACK.cmake
+++ b/cmake/OpenCVFindLAPACK.cmake
@@ -136,10 +136,12 @@ if(WITH_LAPACK)
         ocv_lapack_check()
       endif()
       if(NOT HAVE_LAPACK)
-        if(LAPACKE_INCLUDE_DIR)
+        find_package(CBLAS)
+        if(LAPACKE_INCLUDE_DIR AND CBLAS_FOUND)
           set(LAPACK_INCLUDE_DIR  ${LAPACKE_INCLUDE_DIR})
           set(LAPACK_CBLAS_H      "cblas.h")
           set(LAPACK_LAPACKE_H    "lapacke.h")
+          set(LAPACK_LIBRARIES    ${LAPACK_LIBRARIES} ${CBLAS_LIBRARIES})
           set(LAPACK_IMPL         "LAPACK/Generic")
           ocv_lapack_check()
         elseif(APPLE)