diff --git a/message.mk b/message.mk
index 53afba206..94ab606ec 100644
--- a/message.mk
+++ b/message.mk
@@ -50,7 +50,7 @@ MSG_EXTENDED_LISTING = Creating Extended Listing:
 MSG_SYMBOL_TABLE = Creating Symbol Table:
 MSG_LINKING = Linking:
 MSG_COMPILING = Compiling:
-MSG_COMPILING_CPP = Compiling:
+MSG_COMPILING_CXX = Compiling:
 MSG_ASSEMBLING = Assembling:
 MSG_CLEANING = Cleaning project:
 MSG_CREATING_LIBRARY = Creating library:
diff --git a/tmk_core/arm_atsam.mk b/tmk_core/arm_atsam.mk
index c9b14042f..403ebf3a8 100644
--- a/tmk_core/arm_atsam.mk
+++ b/tmk_core/arm_atsam.mk
@@ -29,8 +29,8 @@ COMPILEFLAGS += -mthumb
 
 CFLAGS += $(COMPILEFLAGS)
 
-CPPFLAGS += $(COMPILEFLAGS)
-CPPFLAGS += -fno-exceptions -std=c++11
+CXXFLAGS += $(COMPILEFLAGS)
+CXXFLAGS += -fno-exceptions -std=c++11
 
 LDFLAGS +=-Wl,--gc-sections
 LDFLAGS += -Wl,-Map="%OUT%%PROJ_NAME%.map"
diff --git a/tmk_core/avr.mk b/tmk_core/avr.mk
index ecd2fd39a..d5ca3a4dd 100644
--- a/tmk_core/avr.mk
+++ b/tmk_core/avr.mk
@@ -25,8 +25,8 @@ CFLAGS += $(COMPILEFLAGS)
 CFLAGS += -fno-inline-small-functions
 CFLAGS += -fno-strict-aliasing
 
-CPPFLAGS += $(COMPILEFLAGS)
-CPPFLAGS += -fno-exceptions -std=c++11
+CXXFLAGS += $(COMPILEFLAGS)
+CXXFLAGS += -fno-exceptions -std=c++11
 
 LDFLAGS +=-Wl,--gc-sections
 
diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index b2e364f21..f9e52aed2 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -167,8 +167,8 @@ CFLAGS += $(COMPILEFLAGS)
 
 ASFLAGS += $(THUMBFLAGS)
 
-CPPFLAGS += $(COMPILEFLAGS)
-CPPFLAGS += -fno-rtti
+CXXFLAGS += $(COMPILEFLAGS)
+CXXFLAGS += -fno-rtti
 
 LDFLAGS +=-Wl,--gc-sections
 LDFLAGS +=-Wl,--no-wchar-size-warning
diff --git a/tmk_core/native.mk b/tmk_core/native.mk
index 530b50b84..3caf64454 100644
--- a/tmk_core/native.mk
+++ b/tmk_core/native.mk
@@ -1,13 +1,13 @@
 SYSTEM_TYPE := $(shell gcc -dumpmachine)
 
 CC = gcc
-OBJCOPY = 
-OBJDUMP = 
-SIZE = 
-AR = 
-NM = 
-HEX = 
-EEP = 
+OBJCOPY =
+OBJDUMP =
+SIZE =
+AR =
+NM =
+HEX =
+EEP =
 BIN =
 
 
@@ -24,6 +24,6 @@ CFLAGS += $(COMPILEFLAGS)
 CFLAGS += -fno-inline-small-functions
 CFLAGS += -fno-strict-aliasing
 
-CPPFLAGS += $(COMPILEFLAGS)
-CPPFLAGS += -fno-exceptions
-CPPFLAGS += -std=gnu++11
\ No newline at end of file
+CXXFLAGS += $(COMPILEFLAGS)
+CXXFLAGS += -fno-exceptions
+CXXFLAGS += -std=gnu++11
diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk
index 334ff314b..c1474a5c2 100644
--- a/tmk_core/rules.mk
+++ b/tmk_core/rules.mk
@@ -65,9 +65,9 @@ CSTANDARD = -std=gnu99
 
 
 # Place -D or -U options here for C++ sources
-#CPPDEFS += -D__STDC_LIMIT_MACROS
-#CPPDEFS += -D__STDC_CONSTANT_MACROS
-#CPPDEFS +=
+#CXXDEFS += -D__STDC_LIMIT_MACROS
+#CXXDEFS += -D__STDC_CONSTANT_MACROS
+#CXXDEFS +=
 
 
 
@@ -111,24 +111,24 @@ CFLAGS += $(CSTANDARD)
 #  -Wa,...:      tell GCC to pass this to the assembler.
 #    -adhlns...: create assembler listing
 ifndef SKIP_DEBUG_INFO
-  CPPFLAGS += -g$(DEBUG)
+  CXXFLAGS += -g$(DEBUG)
 endif
-CPPFLAGS += $(CPPDEFS)
-CPPFLAGS += -O$(OPT)
+CXXFLAGS += $(CXXDEFS)
+CXXFLAGS += -O$(OPT)
 # to supress "warning: only initialized variables can be placed into program memory area"
-CPPFLAGS += -w
-CPPFLAGS += -Wall
-CPPFLAGS += -Wundef
+CXXFLAGS += -w
+CXXFLAGS += -Wall
+CXXFLAGS += -Wundef
 ifneq ($(strip $(ALLOW_WARNINGS)), yes)
-    CPPFLAGS += -Werror
+    CXXFLAGS += -Werror
 endif
-#CPPFLAGS += -mshort-calls
-#CPPFLAGS += -fno-unit-at-a-time
-#CPPFLAGS += -Wstrict-prototypes
-#CPPFLAGS += -Wunreachable-code
-#CPPFLAGS += -Wsign-compare
-CPPFLAGS += -Wa,-adhlns=$(@:%.o=%.lst)
-#CPPFLAGS += $(CSTANDARD)
+#CXXFLAGS += -mshort-calls
+#CXXFLAGS += -fno-unit-at-a-time
+#CXXFLAGS += -Wstrict-prototypes
+#CXXFLAGS += -Wunreachable-code
+#CXXFLAGS += -Wsign-compare
+CXXFLAGS += -Wa,-adhlns=$(@:%.o=%.lst)
+#CXXFLAGS += $(CSTANDARD)
 
 #---------------- Assembler Options ----------------
 #  -Wa,...:   tell GCC to pass this to the assembler.
@@ -213,7 +213,7 @@ GENDEPFLAGS = -MMD -MP -MF $(patsubst %.o,%.td,$@)
 # Add target processor to flags.
 # You can give extra flags at 'make' command line like: make EXTRAFLAGS=-DFOO=bar
 ALL_CFLAGS = $(MCUFLAGS) $(CFLAGS) $(EXTRAFLAGS)
-ALL_CPPFLAGS = $(MCUFLAGS) -x c++ $(CPPFLAGS) $(EXTRAFLAGS)
+ALL_CXXFLAGS = $(MCUFLAGS) -x c++ $(CXXFLAGS) $(EXTRAFLAGS)
 ALL_ASFLAGS = $(MCUFLAGS) -x assembler-with-cpp $(ASFLAGS) $(EXTRAFLAGS)
 
 define NO_LTO
@@ -306,7 +306,7 @@ ifdef $1_CONFIG
 $1_CONFIG_FLAGS += $$(patsubst %,-include %,$$($1_CONFIG))
 endif
 $1_CFLAGS = $$(ALL_CFLAGS) $$($1_DEFS) $$($1_INCFLAGS) $$($1_CONFIG_FLAGS) $$(NOLTO_CFLAGS)
-$1_CPPFLAGS= $$(ALL_CPPFLAGS) $$($1_DEFS) $$($1_INCFLAGS) $$($1_CONFIG_FLAGS) $$(NOLTO_CFLAGS)
+$1_CXXFLAGS= $$(ALL_CXXFLAGS) $$($1_DEFS) $$($1_INCFLAGS) $$($1_CONFIG_FLAGS) $$(NOLTO_CFLAGS)
 $1_ASFLAGS= $$(ALL_ASFLAGS) $$($1_DEFS) $$($1_INCFLAGS) $$($1_CONFIG_FLAGS)
 
 # Compile: create object files from C source files.
@@ -317,16 +317,16 @@ $1/%.o : %.c $1/%.d $1/cflags.txt $1/compiler.txt | $(BEGIN)
 	@$$(BUILD_CMD)
 
 # Compile: create object files from C++ source files.
-$1/%.o : %.cpp $1/%.d $1/cppflags.txt $1/compiler.txt | $(BEGIN)
+$1/%.o : %.cpp $1/%.d $1/cxxflags.txt $1/compiler.txt | $(BEGIN)
 	@mkdir -p $$(@D)
-	@$$(SILENT) || printf "$$(MSG_COMPILING_CPP) $$<" | $$(AWK_CMD)
-	$$(eval CMD=$$(CC) -c $$($1_CPPFLAGS) $$(GENDEPFLAGS) $$< -o $$@ && $$(MOVE_DEP))
+	@$$(SILENT) || printf "$$(MSG_COMPILING_CXX) $$<" | $$(AWK_CMD)
+	$$(eval CMD=$$(CC) -c $$($1_CXXFLAGS) $$(GENDEPFLAGS) $$< -o $$@ && $$(MOVE_DEP))
 	@$$(BUILD_CMD)
 
-$1/%.o : %.cc $1/%.d $1/cppflags.txt $1/compiler.txt | $(BEGIN)
+$1/%.o : %.cc $1/%.d $1/cxxflags.txt $1/compiler.txt | $(BEGIN)
 	@mkdir -p $$(@D)
-	@$$(SILENT) || printf "$$(MSG_COMPILING_CPP) $$<" | $$(AWK_CMD)
-	$$(eval CMD=$$(CC) -c $$($1_CPPFLAGS) $$(GENDEPFLAGS) $$< -o $$@ && $$(MOVE_DEP))
+	@$$(SILENT) || printf "$$(MSG_COMPILING_CXX) $$<" | $$(AWK_CMD)
+	$$(eval CMD=$$(CC) -c $$($1_CXXFLAGS) $$(GENDEPFLAGS) $$< -o $$@ && $$(MOVE_DEP))
 	@$$(BUILD_CMD)
 
 # Assemble: create object files from assembler source files.
@@ -347,8 +347,8 @@ $1/force:
 $1/cflags.txt: $1/force
 	echo '$$($1_CFLAGS)' | cmp -s - $$@ || echo '$$($1_CFLAGS)' > $$@
 
-$1/cppflags.txt: $1/force
-	echo '$$($1_CPPFLAGS)' | cmp -s - $$@ || echo '$$($1_CPPFLAGS)' > $$@
+$1/cxxflags.txt: $1/force
+	echo '$$($1_CXXFLAGS)' | cmp -s - $$@ || echo '$$($1_CXXFLAGS)' > $$@
 
 $1/asflags.txt: $1/force
 	echo '$$($1_ASFLAGS)' | cmp -s - $$@ || echo '$$($1_ASFLAGS)' > $$@