diff --git a/cpu/arm946es/config.mk b/cpu/arm946es/config.mk
index 81ca2885e..f774c7e82 100644
--- a/cpu/arm946es/config.mk
+++ b/cpu/arm946es/config.mk
@@ -25,3 +25,10 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
 	 -msoft-float
 
 PLATFORM_CPPFLAGS +=  -march=armv4
+# =========================================================================
+#
+# Supply options according to compiler version
+#
+# =========================================================================
+PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
+PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
diff --git a/cpu/arm_intcm/config.mk b/cpu/arm_intcm/config.mk
index 81ca2885e..f774c7e82 100644
--- a/cpu/arm_intcm/config.mk
+++ b/cpu/arm_intcm/config.mk
@@ -25,3 +25,10 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
 	 -msoft-float
 
 PLATFORM_CPPFLAGS +=  -march=armv4
+# =========================================================================
+#
+# Supply options according to compiler version
+#
+# =========================================================================
+PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
+PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))