1 # define compiler and compiler flag variables
2 # define a variable for compiler flags (JFLAGS)
3 # define a variable for the compiler (JC)
4 # define a variable for the Java Virtual Machine (JVM)
11 # Clear any default targets for building .class files from .java files; we
12 # will provide our own target entry to do this in this makefile.
13 # make has a set of default targets for different suffixes (like .c.o)
14 # Currently, clearing the default for .java.class is not necessary since
15 # make does not have a definition for this target, but later versions of
16 # make may, so it doesn't hurt to make sure that we clear any default
17 # definitions for these
20 .SUFFIXES
: .java .class
24 # Here is our target entry for creating .class files from .java files
25 # This is a target entry that uses the suffix rule syntax:
28 # DSTS (Dependency Suffix Target Suffix)
29 # 'TS' is the suffix of the target file, 'DS' is the suffix of the dependency
30 # file, and 'rule' is the rule for building a target
31 # '$*' is a built-in macro that gets the basename of the current target
32 # Remember that there must be a < tab > before the command line ('rule')
36 $(JC
) $(JFLAGS
) $*.java
40 # CLASSES is a macro consisting of N words (one for each java source file)
41 # When a single line is too long, use \<return> to split lines that then will be
42 # considered as a single line. For example:
52 # MAIN is a variable with the name of the file containing the main method
58 # the default make target entry
59 # for this example it is the target classes
64 # Next line is a target dependency line
65 # This target entry uses Suffix Replacement within a macro:
66 # $(macroname:string1=string2)
67 # In the words in the macro named 'macroname' replace 'string1' with 'string2'
68 # Below we are replacing the suffix .java of all words in the macro CLASSES
69 # with the .class suffix
72 classes
: $(CLASSES
:.java
=.class
)
75 # Next two lines contain a target for running the program
76 # Remember the tab in the second line.
77 # $(JMV) y $(MAIN) are replaced by their values
82 # this line is to remove all unneeded files from
83 # the directory when we are finished executing(saves space)
84 # and "cleans up" the directory of unneeded .class files
85 # RM is a predefined macro in make (RM = rm -f)