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-rw-r--r--mk/jars.mk29
-rw-r--r--mk/lib.mk11
2 files changed, 39 insertions, 1 deletions
diff --git a/mk/jars.mk b/mk/jars.mk
new file mode 100644
index 000000000000..5d459c0a9d70
--- /dev/null
+++ b/mk/jars.mk
@@ -0,0 +1,29 @@
+define build-jar =
+  $(1)_NAME ?= $(1)
+
+  _d := $$(strip $$($(1)_DIR))
+
+  $(1)_PATH := $$(_d)/$$($(1)_NAME).jar
+
+  $(1)_TMPDIR := $$(_d)/.$$($(1)_NAME).jar.tmp
+
+  $$($(1)_PATH): $$($(1)_SOURCES)
+	@rm -rf $$($(1)_TMPDIR)
+	@mkdir -p $$($(1)_TMPDIR)
+	$(QUIET) javac $(GLOBAL_JAVACFLAGS) $$($(1)_JAVACFLAGS) -d $$($(1)_TMPDIR) $$($(1)_SOURCES)
+	$(QUIET) jar cf $$($(1)_PATH) -C $$($(1)_TMPDIR) .
+	@rm -rf $$($(1)_TMPDIR)
+
+  $(1)_INSTALL_DIR ?= $$(libdir)/java
+
+  $(1)_INSTALL_PATH := $$($(1)_INSTALL_DIR)/$$($(1)_NAME).jar
+
+  $$(eval $$(call install-file-as, $$($(1)_PATH), $$($(1)_INSTALL_PATH), 0644))
+
+  install: $$($(1)_INSTALL_PATH)
+
+  jars_list += $$($(1)_PATH)
+
+  clean_files += $$($(1)_PATH)
+
+endef
diff --git a/mk/lib.mk b/mk/lib.mk
index 1d2f05162812..2d8ceef55f3e 100644
--- a/mk/lib.mk
+++ b/mk/lib.mk
@@ -37,6 +37,7 @@ BUILD_DEBUG ?= 1
 ifeq ($(BUILD_DEBUG), 1)
   GLOBAL_CFLAGS += -g
   GLOBAL_CXXFLAGS += -g
+  GLOBAL_JAVACFLAGS += -g
 endif
 
 
@@ -50,6 +51,7 @@ include mk/dist.mk
 include mk/install.mk
 include mk/libraries.mk
 include mk/programs.mk
+include mk/jars.mk
 include mk/patterns.mk
 include mk/templates.mk
 include mk/tests.mk
@@ -67,6 +69,7 @@ $(foreach mf, $(SUBS), $(eval $(call include-sub-makefile, $(mf))))
 # Instantiate stuff.
 $(foreach lib, $(LIBS), $(eval $(call build-library,$(lib))))
 $(foreach prog, $(PROGRAMS), $(eval $(call build-program,$(prog))))
+$(foreach jar, $(JARS), $(eval $(call build-jar,$(jar))))
 $(foreach script, $(bin_SCRIPTS), $(eval $(call install-program-in,$(script),$(bindir))))
 $(foreach script, $(bin_SCRIPTS), $(eval programs_list += $(script)))
 $(foreach script, $(noinst_SCRIPTS), $(eval programs_list += $(script)))
@@ -74,7 +77,7 @@ $(foreach template, $(template_files), $(eval $(call instantiate-template,$(temp
 $(foreach test, $(INSTALL_TESTS), $(eval $(call run-install-test,$(test))))
 
 
-all: $(programs_list) $(libs_list)
+all: $(programs_list) $(libs_list) $(jars_list)
 
 
 help:
@@ -99,3 +102,9 @@ ifdef libs_list
 	@echo ""
 	@for i in $(libs_list); do echo "  $$i"; done
 endif
+ifdef jars_list
+	@echo ""
+	@echo "The following JARs can be built:"
+	@echo ""
+	@for i in $(jars_list); do echo "  $$i"; done
+endif