diff --git a/clang/test/lit.site.cfg.py.in b/clang/test/lit.site.cfg.py.in
index bc278740e0d04b4f26a13183591813e2c1abd579..c2532e846fe7e79f4bbebd171dcfd99a2d31341b 100644
--- a/clang/test/lit.site.cfg.py.in
+++ b/clang/test/lit.site.cfg.py.in
@@ -42,6 +42,7 @@ config.standalone_build = @CLANG_BUILT_STANDALONE@
 config.ppc_linux_default_ieeelongdouble = @PPC_LINUX_DEFAULT_IEEELONGDOUBLE@
 config.have_llvm_driver = @LLVM_TOOL_LLVM_DRIVER_BUILD@
 config.use_classic_flang = @LLVM_ENABLE_CLASSIC_FLANG@
+config.build_for_openeuler = @BUILD_FOR_OPENEULER@
 
 import lit.llvm
 lit.llvm.initialize(lit_config, config)
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 878eb885adb4a6c220098d208aed4a93011a5e5f..62a1a64d37d43f5a5e0a4f82fe32f2d0a21fd80f 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -105,6 +105,13 @@ else()
   set(LLVM_BUILD_FOR_EMBEDDED 0)
 endif()
 
+option(BUILD_FOR_OPENEULER "Build support for openeuler" OFF)
+if(BUILD_FOR_OPENEULER)
+  set(BUILD_FOR_OPENEULER 1)
+else()
+  set(BUILD_FOR_OPENEULER 0)
+endif()
+
 if(LLVM_ENABLE_EXPENSIVE_CHECKS)
   add_compile_definitions(EXPENSIVE_CHECKS)