diff --git a/Makefile b/Makefile
index 208d4e8b84e56ac47088c25c946478f724e995e9..56cadfd8e46da864c572aef1678d146c52f6b80b 100644
--- a/Makefile
+++ b/Makefile
@@ -121,12 +121,16 @@ test_ourboros: libcore
 .PHONY: testall
 testall: test_irbuild test_ourboros
 
+.PHONY: cleanrsd
+cleanrsd:
+	@rm -rf libjava-core/libcore-all.* libjava-core/m* libjava-core/comb.*
+
 .PHONY: clean
-clean:
-	@rm -rf $(MAPLE_BUILD_OUTPUT)/
+clean: cleanrsd
+	@rm -rf $(MAPLE_BUILD_OUTPUT)
 
 .PHONY: clobber
-clobber: clean
+clobber: cleanrsd
 	@rm -rf output
 
 define build_gn
diff --git a/Readme.md b/Readme.md
index 1a3b5b4fedb240261b0c65960977b214cb2cb857..3f1173d62e2a4c0147254ffd8576d67632cd59d3 100644
--- a/Readme.md
+++ b/Readme.md
@@ -40,6 +40,8 @@ Open the front end, back end, and compilation optimization of compilers. Support
 
 ## How to use
 - source build/envsetup.sh arm release
+  or
+- source build/envsetup.sh arm debug
 - make setup
 - make
 - make libcore
diff --git a/Readme_zh.md b/Readme_zh.md
index 6bfba5aec2788d3fffe550f56b914bd2134bf294..1268d823b3cd424d3bdbf868fa84ece8348e937b 100644
--- a/Readme_zh.md
+++ b/Readme_zh.md
@@ -36,6 +36,8 @@ OpenArkCompiler是来自华为方舟编译器的开源项目。
 
 ## 如何使用
 - source build/envsetup.sh arm release
+  或
+- source build/envsetup.sh arm debug
 - make setup
 - make
 - make libcore
diff --git a/build/envsetup.sh b/build/envsetup.sh
index c239e9cbdac1b03bdd48cf4bc9b4c6867d4bf9fb..81e8417c653f978114c1d9d76c8b3c82bbc931b3 100644
--- a/build/envsetup.sh
+++ b/build/envsetup.sh
@@ -88,7 +88,7 @@ else
 fi
 
 unset MAPLE_DEBUG
-export MAPLE_DEBUG=0
+export MAPLE_DEBUG=${DEBUG}
 
 unset TARGET_PROCESSOR
 export TARGET_PROCESSOR=${PLATFORM}