Java example source code file (Makefile)

This example Java source code file (Makefile) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arch, cflags, echo, extra_libs, java_home, launcherlib, ldflags_common, libdir, linux, platform, uname

The Makefile Java example source code

#
#
# Makefile for building libLauncher.so
#
# To build libLauncher.so requires :-
#     JAVA_HOME environment variable 
#     cc (Solaris) or gcc (Linux) on PATH
#
# The library is created in a architecture specific directory :-
#
#     lib/solaris-sparc/libLauncher.so	(Solaris/SPARC)
#     lib/solaris-i586/libLauncher.so	(Solaris/x86)
#     lib/linux-i586/libLauncher.so	(Linux/x86)

ECHO  = echo
MKDIR = mkdir
UNAME = uname

uname := $(shell uname)

ifeq ($(uname), SunOS)
  PLATFORM = solaris
  ISAINFO = isainfo
  ARCH_DATA_MODEL=64
  ARCH := $(shell $(ISAINFO) -n)
  CC = cc
  LD = ld
  CFLAGS = -D_REENTRANT -D__solaris__
  LDFLAGS_COMMON = -G
  EXTRA_LIBS = -lc
  CC += -m64 -Kpic
endif

ifeq ($(uname), Linux)
  PLATFORM = linux
  archExpr = case "`$(UNAME) -m`" in  \
		i[3-6]86) \
                    $(ECHO) i586 \
                    ;; \
		sparc*)	 \
                    $(ECHO) sparc \
                    ;; \
		*) \
                    $(UNAME) -m	 \
                    ;; \
	   esac
  ARCH	    := $(shell $(archExpr) )
  CC = gcc
  CFLAGS = -fno-strict-aliasing -fPIC -W -Wall
  LD = ld
  LDFLAGS_COMMON = -shared
  EXTRA_LIBS = -lc
endif

LIBDIR=lib/$(PLATFORM)-$(ARCH)
LAUNCHERLIB=$(LIBDIR)/libLauncher.so

all: java_home $(LAUNCHERLIB)

$(LAUNCHERLIB) : $(LIBDIR) $(LIBDIR)/Launcher.o
	$(LD) $(LDFLAGS_COMMON) -o $(LAUNCHERLIB) $(LIBDIR)/Launcher.o $(EXTRA_LIBS)

$(LIBDIR):
	@$(MKDIR) -p $(LIBDIR)

$(LIBDIR)/Launcher.o : Launcher.c \
		       Launcher.h
	$(CC) -c $(CFLAGS) -o $(LIBDIR)/Launcher.o \
	    -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/$(PLATFORM) Launcher.c
	
Launcher.h : Launcher.class
	$(JAVA_HOME)/bin/javah -force Launcher

Launcher.class : Launcher.java
	$(JAVA_HOME)/bin/javac Launcher.java

java_home:
ifndef JAVA_HOME
	@$(ECHO) "ERROR: Your JAVA_HOME environment variable is not set."
	exit 1	
endif