diff --git a/cpu/mcf5227x/config.mk b/cpu/mcf5227x/config.mk
index 8d60fd6..2e50696 100644
--- a/cpu/mcf5227x/config.mk
+++ b/cpu/mcf5227x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5208 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5307 -fPIC
diff --git a/cpu/mcf523x/config.mk b/cpu/mcf523x/config.mk
index 93645a3..73fb08d 100644
--- a/cpu/mcf523x/config.mk
+++ b/cpu/mcf523x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5235 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5307 -fPIC
diff --git a/cpu/mcf52x2/config.mk b/cpu/mcf52x2/config.mk
index 650e340..be360f8 100644
--- a/cpu/mcf52x2/config.mk
+++ b/cpu/mcf52x2/config.mk
@@ -34,7 +34,7 @@ is5275:=$(shell grep CONFIG_M5275 $(TOPDIR)/include/$(cfg))
 is5282:=$(shell grep CONFIG_M5282 $(TOPDIR)/include/$(cfg))
 
 
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 
 ifneq (,$(findstring CONFIG_M5249,$(is5249)))
 PLATFORM_CPPFLAGS += -mcpu=5249
diff --git a/cpu/mcf532x/config.mk b/cpu/mcf532x/config.mk
index 16a0bc3..e4a3cf9 100644
--- a/cpu/mcf532x/config.mk
+++ b/cpu/mcf532x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5329 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5307 -fPIC
diff --git a/cpu/mcf5445x/config.mk b/cpu/mcf5445x/config.mk
index 88433f2..a85d0f9 100644
--- a/cpu/mcf5445x/config.mk
+++ b/cpu/mcf5445x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=54455 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5407 -fPIC
diff --git a/cpu/mcf547x_8x/config.mk b/cpu/mcf547x_8x/config.mk
index e5f4385..eb6b50b 100644
--- a/cpu/mcf547x_8x/config.mk
+++ b/cpu/mcf547x_8x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5485 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5407 -fPIC