changes in the makefile

Makefile

@@ -1,5 +1,13 @@
 all: clone_custom_noir build_noir clone_custom_plonky2 build_plonky2 build_backend precompile_tests
 
+# Cloning and building external resources
+
+build_external:
+	$(MAKE) clone_custom_noir
+	$(MAKE) build_noir
+	$(MAKE) clone_custom_plonky2
+	$(MAKE) build_plonky2
+
 clone_custom_noir:
 	git clone https://github.com/brweisz/noir
 
@@ -12,12 +20,21 @@ clone_custom_plonky2:
 build_plonky2:
 	rustup override set nightly && cd plonky2 && cargo build --release
 
+
+# Building plonky2-backend
+
 build_backend:
 	cd plonky2-backend && cargo build --release
 
+
+# Tests
+
 precompile_tests:
 	python prepare_compiled_noir_test_programs.py
 
+
+# Execution
+
 nargo_execute:
 	cd noir_example && ../noir/target/release/nargo execute witness --print-acir