From: Victor Westerhuis <VJ.Westerhuis@student.han.nl>
Date: Fri, 9 Sep 2022 14:01:42 +0200
Subject: Fix LAPACK finding CMake code

On Debian cblas.h and lapacke.h are not installed in the same include
directory. This does not matter when compiling, but the custom header
check in OpenCV fails on it. Force OpenCV to use the standard CMake
check_include_file function to do the check so it succeeds.
---
 cmake/OpenCVFindLAPACK.cmake | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

Index: opencv/cmake/OpenCVFindLAPACK.cmake
===================================================================
--- opencv.orig/cmake/OpenCVFindLAPACK.cmake	2024-12-11 01:59:53.067051076 +0000
+++ opencv/cmake/OpenCVFindLAPACK.cmake	2024-12-11 01:59:53.063051188 +0000
@@ -24,22 +24,11 @@
 macro(_find_header_file_in_dirs VAR NAME)
   unset(${VAR})
   unset(${VAR} CACHE)
-  if(" ${ARGN}" STREQUAL " ")
-    check_include_file("${NAME}" HAVE_${VAR})
-    if(HAVE_${VAR})
-      set(${VAR} "${NAME}") # fallback
-    else()
-      set(${VAR} "")
-    endif()
+  check_include_file("${NAME}" HAVE_${VAR})
+  if(HAVE_${VAR})
+    set(${VAR} "${NAME}") # fallback
   else()
-    find_path(${VAR} "${NAME}" ${ARGN} NO_DEFAULT_PATH)
-    if(${VAR})
-      set(${VAR} "${${VAR}}/${NAME}")
-      unset(${VAR} CACHE)
-    else()
-      unset(${VAR} CACHE)
-      set(${VAR} "")
-    endif()
+    set(${VAR} "")
   endif()
 endmacro()