6875240: Reduce Makefile build time by limiting repeated exec's (mostly for cygwin building)
Reviewed-by: jjg, iris
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# Input: BUILDDIR PACKAGE PKGDIR PROGRAM BUILDTOOL_SOURCE_ROOT BUILDTOOL_MAIN
# All subdirectories under the package root for the tool (max depth 4)
_WC_DIRS = * */* */*/* */*/*/*
BUILDTOOL_MAIN_SOURCE_FILE = $(BUILDTOOL_SOURCE_ROOT)/$(BUILDTOOL_MAIN)
BUILDTOOL_MANIFEST_FILE = $(BUILDTOOLCLASSDIR)/$(PROGRAM)_manifest.mf
BUILDTOOL_JAR_FILE = $(BUILDTOOLJARDIR)/$(PROGRAM).jar
BUILTTOOL_MAINCLASS = $(subst /,.,$(BUILDTOOL_MAIN:%.java=%))
# Wildcard patterns that find all the sources for this build tool
BUILDTOOL_WC_PATTERNS = $(BUILDTOOL_SOURCE_ROOT)/$(PKGDIR)/*.java \
$(patsubst %, $(BUILDTOOL_SOURCE_ROOT)/$(PKGDIR)/%/*.java, $(_WC_DIRS))
# Wildcard expansion that finds all the files
BUILDTOOL_SRC_FILES := $(wildcard $(BUILDTOOL_WC_PATTERNS))
all build: $(BUILDTOOL_JAR_FILE)
$(BUILDTOOL_MANIFEST_FILE): $(BUILDTOOL_MAIN_SOURCE_FILE)
@$(prep-target)
$(ECHO) "Main-Class: $(BUILTTOOL_MAINCLASS)" > $@
$(BUILDTOOL_JAR_FILE): $(BUILDTOOL_MANIFEST_FILE) $(BUILDTOOL_SRC_FILES)
@$(prep-target)
@$(MKDIR) -p $(BUILDTOOLCLASSDIR)
$(BOOT_JAVAC_CMD) -d $(BUILDTOOLCLASSDIR) \
-sourcepath $(BUILDTOOL_SOURCE_ROOT) $(BUILDTOOL_MAIN_SOURCE_FILE)
$(BOOT_JAR_CMD) cfm $@ $(BUILDTOOL_MANIFEST_FILE) \
-C $(BUILDTOOLCLASSDIR) $(PKGDIR) \
$(JAR_JFLAGS) || $(RM) $@
@$(java-vm-cleanup)
clean clobber::
$(RM) -r $(BUILDTOOLCLASSDIR)/$(PKGDIR) \
$(BUILDTOOL_MANIFEST_FILE) \
$(BUILDTOOL_JAR_FILE)