HelloWorld/Makefile

   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)
   5 # define a variable for a parameter. When you run make, you could use:
   6 # make run FILE="Algo.csv" para sobre escribir el valor de FILE.
   7
   8 JFLAGS = -g
   9 JC = javac
  10 JVM = java
  11 FILE =
  12
  13 #
  14 # Clear any default targets for building .class files from .java files; we
  15 # will provide our own target entry to do this in this makefile.
  16 # make has a set of default targets for different suffixes (like .c.o)
  17 # Currently, clearing the default for .java.class is not necessary since
  18 # make does not have a definition for this target, but later versions of
  19 # make may, so it doesn't hurt to make sure that we clear any default
  20 # definitions for these
  21 #
  22
  23 .SUFFIXES: .java .class
  24
  25
  26 #
  27 # Here is our target entry for creating .class files from .java files
  28 # This is a target entry that uses the suffix rule syntax:
  29 #       DSTS:
  30 #               rule
  31 # DSTS (Dependency Suffix     Target Suffix)
  32 # 'TS' is the suffix of the target file, 'DS' is the suffix of the dependency
  33 #  file, and 'rule'  is the rule for building a target
  34 # '$*' is a built-in macro that gets the basename of the current target
  35 # Remember that there must be a < tab > before the command line ('rule')
  36 #
  37
  38 .java.class:
  39         $(JC) $(JFLAGS) $*.java
  40
  41
  42 #
  43 # CLASSES is a macro consisting of N words (one for each java source file)
  44 # When a single line is too long, use \<return> to split lines that then will be
  45 # considered as a single line. For example:
  46 # NAME = Camilo \
  47          Juan
  48 # is understood as
  49 # NAME = Camilo        Juan
  50
  51 CLASSES = \
  52         HelloWorld.java
  53
  54 #
  55 # MAIN is a variable with the name of the file containing the main method
  56 #
  57
  58 MAIN = HelloWorld
  59
  60 #
  61 # the default make target entry
  62 # for this example it is the target classes
  63
  64 default: classes
  65
  66
  67 # Next line is a target dependency line
  68 # This target entry uses Suffix Replacement within a macro:
  69 # $(macroname:string1=string2)
  70 # In the words in the macro named 'macroname' replace 'string1' with 'string2'
  71 # Below we are replacing the suffix .java of all words in the macro CLASSES
  72 # with the .class suffix
  73 #
  74
  75 classes: $(CLASSES:.java=.class)
  76
  77
  78 # Next two lines contain a target for running the program
  79 # Remember the tab in the second line.
  80 # $(JMV) y $(MAIN) are replaced by their values
  81
  82 run: $(MAIN).class
  83         $(JVM) $(MAIN)
  84
  85 # this line is to remove all unneeded files from
  86 # the directory when we are finished executing(saves space)
  87 # and "cleans up" the directory of unneeded .class files
  88 # RM is a predefined macro in make (RM = rm -f)
  89 #
  90
  91 clean:
  92         $(RM) *.class