fix: correction fo command for building assembly

README.md

@@ -1,8 +1,21 @@
 This program, compiled with clang 12+, should work.
-However, it is using an undefined behaviour in the `isEven.cpp` file.
+However, it is using an undefined behaviour in the [`isEven.cpp` file](isEven.cpp).
+
+# How to use
+
+Run
 
 ```
 make run
 ```
 
+If you wish to see the assembly :
+
+```
+make build-assembly
+```
+
+
+# Source
+
 Originates from https://twitter.com/jckarter/status/1428072308351016969

makefile

@@ -5,14 +5,15 @@ all: main
 main: isEven.o main.o
 	@clang++ main.o isEven.o -lstdc++ --output main ${CFLAGS}
 
-.PHONY: build-assembly
-build-assembly:
-	@clang++ lolilol.cpp -S -masm=intel ${CFLAGS}
+isEven.s: isEven.cpp
+	@clang++ $< -S -masm=intel ${CFLAGS}
 
 .PHONY: run
 run: main
 	./main
 
+.PHONY: build-assembly
+build-assembly: isEven.s
 
 main.o: isEven.h