diff --git a/cpu/mcf5227x/config.mk b/cpu/mcf5227x/config.mk
index 8d60fd66bf08bbfbef35328f4e96a86fbf72abbe..2e5069687c9b522898e517a0de265adacbea82d1 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 93645a31e0a086c4c12d6d2d9ec8cd4b93f12f50..73fb08d1cec3e7fcfed6dfd53c2cbf9dcc0b20ec 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 $(CROSS_COMPILE)gcc --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5235 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5307 -fPIC
diff --git a/cpu/mcf52x2/config.mk b/cpu/mcf52x2/config.mk
index 650e340aee8deea980598f84c2022e332ed4791d..be360f882295732fa42dd7fafed0d6316fa95055 100644
--- a/cpu/mcf52x2/config.mk
+++ b/cpu/mcf52x2/config.mk
@@ -34,7 +34,7 @@ is5275:=$(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 16a0bc3264b1031b394d0180fd5dac5c6a08b269..e4a3cf9fdcbd79a06bfad4cc9f54de9420be5ff1 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 88433f2f6d6e04494d46b662e528ea5a1547a049..a85d0f9fc50da1a9e74cf656808ac09c50c691c8 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 e5f4385dd35f7ea23099a97f3f9bcd7d33b0140e..eb6b50b2127106dfb89fb998daa0b5260e7d99bd 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