require consistent minimal cmake version

CMakeLists.txt

@@ -2,7 +2,7 @@
 ## Author: Hank Anderson <hank@statease.com>
 ##
 
-cmake_minimum_required(VERSION 2.8.5)
+cmake_minimum_required(VERSION 3.6)
 
 project(OpenBLAS C ASM)
 
@@ -258,10 +258,6 @@ if (${CMAKE_SYSTEM_NAME} MATCHES "AIX|Android|Linux|FreeBSD|OpenBSD|NetBSD|Drago
   endif()
 endif()
 
-if (APPLE AND BUILD_SHARED_LIBS)
-set(CMAKE_MACOSX_RPATH ON)
-endif()
-
 # Seems that this hack doesn't required since macOS 11 Big Sur
 if (APPLE AND BUILD_SHARED_LIBS AND CMAKE_HOST_SYSTEM_VERSION VERSION_LESS 20)
   set (CMAKE_C_USE_RESPONSE_FILE_FOR_OBJECTS 1)

lapack-netlib/INSTALL/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.6)
 project(TIMING Fortran)
 add_executable(secondtst_NONE second_NONE.f secondtst.f)
 add_executable(secondtst_EXT_ETIME second_EXT_ETIME.f secondtst.f)

lapack-netlib/LAPACKE/mangling/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.6)
 project(MANGLING C Fortran)
 
 add_executable(xintface Fintface.f Cintface.c)

lapack-netlib/lapack_build.cmake

@@ -4,7 +4,7 @@
 ## HINTS: ctest -Ddashboard_model=Nightly      -S $(pwd)/lapack/lapack_build.cmake
 ##
 
-cmake_minimum_required(VERSION 2.8.10)
+cmake_minimum_required(VERSION 3.6)
 ###################################################################
 # The values in this section must always be provided
 ###################################################################