diff --git a/make/decompress.mk b/make/decompress.mk
new file mode 100644
index 00000000..68c0ca93
--- /dev/null
+++ b/make/decompress.mk
@@ -0,0 +1,19 @@
+all:
+
+DC_EXT                      ?= xz bzip2 gz zip
+DC_COMPRESSED_ALL           ?= $(foreach ext,$(DC_EXT),$(wildcard *.$(ext)))
+DC_UNCOMPRESSED_ALL         ?= $(foreach patt,$(DC_EXT),$(patsubst %.$(patt),%,$(wildcard *.$(patt))))
+
+all: $(DC_UNCOMPRESSED_ALL)
+clean: clean.uncompressed
+clean.uncompressed:
+	rm -f $(DC_UNCOMPRESSED_ALL)
+
+%: %.xz
+	xz -dk $<
+%: %.gz
+	gunzip -k $<
+%: %.bzip2
+	bunzip -k $<
+%: %.zip
+	unzip $<
diff --git a/make/defs-cpp.mk b/make/defs-cpp.mk
index 84bf05b1..bfb279f6 100644
--- a/make/defs-cpp.mk
+++ b/make/defs-cpp.mk
@@ -23,6 +23,10 @@ ifeq ($(findstring $(TARGET_OS),linux),)
   USE_SYSTEMD               := false
 endif
 
+ifeq ($(USE_CCACHE),true)
+  CCACHE                    := ccache$(space)
+endif
+
 # -- build TAGGED_TMPL_TAGS cascade
 
 TAGGED_TMPL_MAKEFILES        = $(wildcard $(addsuffix .mk,$(foreach t,$(TAGGED_TMPL_DIRS),$(addprefix $(t)/,$(TAGGED_TMPL_TAGS)))))
@@ -173,11 +177,11 @@ endif
 
 ifeq ($(COMPILER_SUITE),gcc)
 
-  GCC                       ?= $(TC_BIN_PREFIX)gcc
-  GXX                       ?= $(TC_BIN_PREFIX)g++
+  GCC                       ?= $(CCACHE)$(TC_BIN_PREFIX)gcc
+  GXX                       ?= $(CCACHE)$(TC_BIN_PREFIX)g++
   GNU_LD                    ?= $(TC_BIN_PREFIX)ld
-  CLANG                     ?= $(TC_BIN_PREFIX)clang
-  CLANGPP                   ?= $(TC_BIN_PREFIX)clang++
+  CLANG                     ?= $(CCACHE)$(TC_BIN_PREFIX)clang
+  CLANGPP                   ?= $(CCACHE)$(TC_BIN_PREFIX)clang++
   STRIP                     ?= $(TC_BIN_PREFIX)strip
   RANLIB                    ?= $(TC_BIN_PREFIX)ranlib
   AR                        ?= $(TC_BIN_PREFIX)ar