# We've mostly used gcc to run the preprocessor, compiler, and linker all in one step.
 1114  gcc -o talk main.c speak.c shout.c
 1115  ./talk

# Below we see how they can be run separately
 1099  gcc -E shout.c > shout_pre.c
 1100  gcc -E speak.c > speak_pre.c
 1101  gcc -E main.c > main_pre.c
 1105  gcc -c -o shout.o shout_pre.c 
 1108* gcc -c -o speak.o speak_pre.c
 1109  gcc -c -o main.o main._pre.c 
 1110  ls *.o
 1111* gcc -o talk main.o speak.o shout.o 
 1113  ./talk 

# We examined the talk source files to see the #include's
 1123  vim main.c 
 1124  vim shout.c 
 1125  vim speak.c

 1133  vim Makefile 

# run the talk target, which performs all commands to create talk
 1134  make -f Makefile talk

# clean up
 1134  rm talk *.o

# Run just the speak.o target
 1134  make -f Makefile speak.o

# Now when we run the talk target, the gcc commands to create speak.o don't run since speak.o is up-to-date
 1136  make -f Makefile talk

# Running this again, nothing needs to happen
 1139  make -f Makefile talk

# Now we make a small change to shout.c, to see that only some commands need to be re-run,
# but in particular speak.o does not have to get re-created.
 1140 vim shout.c   # edit and save
 1141 make -f Makefile talk

# Finally, by default make will use the file 'Makefile', so this works too
 1142 make talk

# also by default, make will use the first target in the Makefile, so the following runs talk target
 1143 make

 1143  history > make.history