diff --git a/config_cortex_m0.mk b/config_cortex_m0.mk
index 22c57c7..9c88128 100644
--- a/config_cortex_m0.mk
+++ b/config_cortex_m0.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX =
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)
diff --git a/config_cortex_m3.mk b/config_cortex_m3.mk
index 5939f75..c4ba406 100644
--- a/config_cortex_m3.mk
+++ b/config_cortex_m3.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX =
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)
diff --git a/config_cortex_m4.mk b/config_cortex_m4.mk
index 2cdaa1f..caef412 100644
--- a/config_cortex_m4.mk
+++ b/config_cortex_m4.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX =
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)
diff --git a/config_cortex_m4f.mk b/config_cortex_m4f.mk
index 09f1d60..94cd223 100644
--- a/config_cortex_m4f.mk
+++ b/config_cortex_m4f.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX =
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)
diff --git a/config_cortex_m7.mk b/config_cortex_m7.mk
index d3fd398..ddd6688 100644
--- a/config_cortex_m7.mk
+++ b/config_cortex_m7.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX =
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)
diff --git a/config_linux.mk b/config_linux.mk
index c08bf58..8ce7a15 100644
--- a/config_linux.mk
+++ b/config_linux.mk
@@ -2,6 +2,7 @@
 TOOLCHAIN_SUFFIX = 
 
 CC = $(TOOLCHAIN_PREFIX)gcc$(TOOLCHAIN_SUFFIX)
+CPP = $(TOOLCHAIN_PREFIX)cpp$(TOOLCHAIN_SUFFIX)
 GDB = $(TOOLCHAIN_PREFIX)gdb$(TOOLCHAIN_SUFFIX)
 SIZE = $(TOOLCHAIN_PREFIX)size$(TOOLCHAIN_SUFFIX)
 OBJCOPY = $(TOOLCHAIN_PREFIX)objcopy$(TOOLCHAIN_SUFFIX)