diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -1431,7 +1431,7 @@
   "# Allow generated file to be relocatable.\n"
   "def path(p):\n"
   "  if not p: return ''\n"
-  "  p = os.path.join(os.path.dirname(os.path.abspath(__file__)), p)\n"
+  "  p = os.path.join(os.path.dirname(os.path.realpath(__file__)), p)\n"
   "  p = os.path.normpath(p).replace(os.sep, '/')\n"
   "  if os.name == 'nt' and os.path.isabs(p): return p[0].upper() + p[1:]\n"
   "  return p\n"