In the following makefile:
all: alpha.o gamma.o
g++ alpha.o gamma.o -o theta
alpha.o: alpha.cpp beta.o
g++ -c alpha.cpp
beta.o: beta.cpp beta.h gamma.o
g++ -c beta.cpp
g++ beta.o gamma.o -o betaGamma
gamma.o: gamma.cpp
g++ -c gamma.cpp
If the files "beta.h", "gamma.cpp" have changed what
sequence of commands are execute when the command "make alpha.o"
is used? Hint: if in doubt, try the programs below...
// alpha.cpp
#include <iostream.h>
#include "beta.h"
void foo(void) {
cout << 42 << endl;
}
// beta.h
const int a = 42;
void foo(void);
// beta.cpp
#include <iostream.h>
#include "beta.h"
void foo(void) {
cout << a << " is the answer" << endl;
}
// gamma.cpp
#include "beta.h"
void main(void) {
foo();
}