prepare (1/3): 
finished

make (2/3): 
Makefile:49: warning: overriding recipe for target 'main'
Makefile:21: warning: ignoring old recipe for target 'main'
Makefile:52: warning: overriding recipe for target 'memcheck'
Makefile:24: warning: ignoring old recipe for target 'memcheck'
Makefile:55: warning: overriding recipe for target 'clean'
Makefile:27: warning: ignoring old recipe for target 'clean'
g++ -g -Wall -o main.o -c main.cpp
g++ -g -Wall -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully