Convert MKL symbols from global to local (#122284)

PyTorch is statically linked to MKL but MKL symbols are visible to global, which may cause symbol conflicts.
Such error has been observed when a different version of MKL is dynamically linked to the other components: `libtorch_cpu.so` was invoked incorrectly when MKL descriptor was freed.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/122284
Approved by: https://github.com/EikanWang, https://github.com/cyyever, https://github.com/ezyang

cmake/public/mkl.cmake

@@ -21,3 +21,20 @@ endforeach()
 set_property(
   TARGET caffe2::mkl PROPERTY INTERFACE_LINK_DIRECTORIES
   ${MKL_ROOT}/lib ${MKL_ROOT}/lib/intel64 ${MKL_ROOT}/lib/intel64_win ${MKL_ROOT}/lib/win-x64)
+
+if(UNIX)
+  if(USE_STATIC_MKL)
+    foreach(MKL_LIB_PATH IN LISTS MKL_LIBRARIES)
+      if(NOT EXISTS "${MKL_LIB_PATH}")
+        continue()
+      endif()
+
+      get_filename_component(MKL_LIB_NAME "${MKL_LIB_PATH}" NAME)
+
+      # Match archive libraries starting with "libmkl_"
+      if(MKL_LIB_NAME MATCHES "^libmkl_" AND MKL_LIB_NAME MATCHES ".a$")
+        target_link_options(caffe2::mkl INTERFACE "-Wl,--exclude-libs,${MKL_LIB_NAME}")
+      endif()
+    endforeach()
+  endif()
+endif()