diff -r 000000000000 -r 6474c204b198 config/makefiles/debugmake.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config/makefiles/debugmake.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,121 @@
+# -*- makefile -*-
+# vim:set ts=8 sw=8 sts=8 noet:
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+###########################################################################
+## Intent: Helper targets for displaying variables and state information
+###########################################################################
+
+# Support usage outside of config/rules.mk
+ifndef INCLUDED_DEBUGMAKE_MK #{
+
+define shell_quote
+'$(subst ','\'',$(1))'
+endef
+
+echo-variable-%:
+	@echo $(call shell_quote,$($*))
+
+echo-tiers:
+	@echo $(TIERS)
+
+echo-tier-dirs:
+	@$(foreach tier,$(TIERS),echo '$(tier):'; echo '  dirs: $(tier_$(tier)_dirs)'; $(if $(tier_$(tier)_staticdirs),echo '  staticdirs: $(tier_$(tier)_staticdirs)';) )
+
+echo-dirs:
+	@echo $(call shell_quote,$(DIRS))
+
+define print_var
+@printf '%20s = %s\n' $1 $(call shell_quote,$($1))
+
+endef
+
+define print_vars
+$(foreach var,$1,$(call print_var,$(var)))
+endef
+
+showtargs:
+ifneq (,$(filter $(PROGRAM) $(HOST_PROGRAM) $(SIMPLE_PROGRAMS) $(HOST_LIBRARY) $(LIBRARY) $(SHARED_LIBRARY),$(TARGETS)))
+	@echo --------------------------------------------------------------------------------
+	$(call print_vars,\
+		PROGRAM \
+		SIMPLE_PROGRAMS \
+		LIBRARY \
+		SHARED_LIBRARY \
+		SHARED_LIBRARY_LIBS \
+		LIBS \
+		DEF_FILE \
+		IMPORT_LIBRARY \
+		STATIC_LIBS \
+		EXTRA_DSO_LDOPTS \
+		DEPENDENT_LIBS \
+	)
+	@echo --------------------------------------------------------------------------------
+endif
+	$(LOOP_OVER_PARALLEL_DIRS)
+	$(LOOP_OVER_DIRS)
+	$(LOOP_OVER_TOOL_DIRS)
+
+showbuild:
+	$(call print_vars,\
+		MOZ_BUILD_ROOT \
+		MOZ_WIDGET_TOOLKIT \
+		CC \
+		CXX \
+		CCC \
+		CPP \
+		LD \
+		AR \
+		IMPLIB \
+		FILTER \
+		MKSHLIB \
+		MKCSHLIB \
+		RC \
+		MC \
+		CFLAGS \
+		OS_CFLAGS \
+		COMPILE_CFLAGS \
+		CXXFLAGS \
+		OS_CXXFLAGS \
+		COMPILE_CXXFLAGS \
+		COMPILE_CMFLAGS \
+		COMPILE_CMMFLAGS \
+		LDFLAGS \
+		OS_LDFLAGS \
+		DSO_LDOPTS \
+		OS_INCLUDES \
+		OS_LIBS \
+		EXTRA_LIBS \
+		BIN_FLAGS \
+		INCLUDES \
+		DEFINES \
+		ACDEFINES \
+		BIN_SUFFIX \
+		LIB_SUFFIX \
+		DLL_SUFFIX \
+		IMPORT_LIB_SUFFIX \
+		INSTALL \
+		VPATH \
+	)
+
+showhost:
+	$(call print_vars,\
+		HOST_CC \
+		HOST_CXX \
+		HOST_CFLAGS \
+		HOST_LDFLAGS \
+		HOST_LIBS \
+		HOST_EXTRA_LIBS \
+		HOST_EXTRA_DEPS \
+		HOST_PROGRAM \
+		HOST_OBJS \
+		HOST_PROGOBJS \
+		HOST_LIBRARY \
+	)
+
+INCLUDED_DEBUGMAKE_MK = 1
+endif #}