############################################################-*-Makefile-*-####
# JC - Compile Java Files
##############################################################################
# $Id$
##############################################################################
# Usage
#
# make jc [target=<target>] {<VARIABLE>=<value>}
#
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# Variables
#
# JC_COMPILER = compiler name, for example JAVAC
# $(JC_COMPILER) = compiler command
# $(JC_COMPILER)_FLAGS = compiler-specific compilation flags
# JC_FLAGS += compilation flags
# JC_CLASSPATH = location of user class files
# JC_SOURCEPATH = location of input source files
# JC_BOOTCLASSPATH = location of bootstrap class files
# JC_EXTDIRS = location of installed extensions
# JC_OUTPUTDIR = directory where to place generated class files
# JC_ENCODING = character encoding used by source files
# JC_SOURCE = version of source code
# JC_TARGET = version of target bytecode
# JC_FILES += files to compile
#
# All variables may have target specific values which override the
# normal value. Those values are specified by variables whose name is
# prefixed with the target name. For example, to override the value of
# the variable JC_CLASSPATH with target COMPILER, one may define the
# variable COMPILER_JC_CLASSPATH
#
##############################################################################
# Examples
#
# Compile file "sources/scalac/Main.java"
#
# make jc JC_FILES=sources/scalac/Main.java
#
#
# Compile the whole runtime
#
# make jc target=RUNTIME
#
#
# A Makefile rule that compiles all modified files from the runtime
#
# .latest-runtime : $(RUNTIME_JC_FILES)
# @$(MAKE) jc target=RUNTIME RUNTIME_JC_FILES='$?'
# touch $@
#
##############################################################################
##############################################################################
# Defaults
JC_CYGWIN ?= $(filter CYGWIN%,$(shell uname))
JC_COMPILER ?= JAVAC
JAVAC ?= javac
##############################################################################
# Values
jc_COMPILER = $(call JC_LOOKUP,JC_COMPILER)
jc_compiler = $(call JC_LOOKUP,$(jc_COMPILER))
jc_compiler_flags = $(call JC_LOOKUP,$(jc_COMPILER)_FLAGS)
jc_FLAGS = $(call JC_LOOKUP,JC_FLAGS)
jc_CLASSPATH = $(call JC_LOOKUP,JC_CLASSPATH)
jc_SOURCEPATH = $(call JC_LOOKUP,JC_SOURCEPATH)
jc_BOOTCLASSPATH = $(call JC_LOOKUP,JC_BOOTCLASSPATH)
jc_EXTDIRS = $(call JC_LOOKUP,JC_EXTDIRS)
jc_OUTPUTDIR = $(call JC_LOOKUP,JC_OUTPUTDIR)
jc_ENCODING = $(call JC_LOOKUP,JC_ENCODING)
jc_SOURCE = $(call JC_LOOKUP,JC_SOURCE)
jc_TARGET = $(call JC_LOOKUP,JC_TARGET)
jc_FILES = $(call JC_LOOKUP,JC_FILES)
##############################################################################
# Command
jc += $(jc_compiler)
jc += $(jc_compiler_flags)
jc += $(jc_FLAGS)
jc += $(jc_CLASSPATH:%=-classpath $(call JC_CYGPATH,%))
jc += $(jc_SOURCEPATH:%=-sourcepath $(call JC_CYGPATH,%))
jc += $(jc_BOOTCLASSPATH:%=-bootclasspath $(call JC_CYGPATH,%))
jc += $(jc_EXTDIRS:%=-extdirs $(call JC_CYGPATH,%))
jc += $(jc_OUTPUTDIR:%=-d $(call JC_CYGFILE,%))
jc += $(jc_ENCODING:%=-encoding %)
jc += $(jc_SOURCE:%=-source %)
jc += $(jc_TARGET:%=-target %)
jc += $(jc_FILES:%=$(call JC_CYGFILE,%))
##############################################################################
# Functions
JC_LOOKUP = $(if $($(target)_$(1)),$($(target)_$(1)),$($(1)))
JC_CYGPATH = $(if $(JC_CYGWIN),`cygpath -w -p $(1)`,$(1))
JC_CYGFILE = $(if $(JC_CYGWIN),`cygpath -w $(1)`,$(1))
##############################################################################
# Rules
jc :
@[ -d "$(jc_OUTPUTDIR)" ] || $(MKDIR) -p "$(jc_OUTPUTDIR)"
$(strip $(jc))
.PHONY : jc
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