--- Libc/Libc-583/Makefile.features
+++ Libc/Libc-498.1.5/Makefile.features
@@ -1,16 +1,8 @@
 .include "Platforms/${RC_TARGET_CONFIG}/Makefile.inc"
 
-# Have to use || to avoid warning message if && is used
-.ifdef CCARCH
-_BLOCKS != ${MYCC} -arch ${CCARCH} -E -dD -x c /dev/null | fgrep -q __BLOCKS__ || echo NO
-.if ${_BLOCKS} != NO
-FEATURE_BLOCKS = YES
-.endif # _BLOCKS
-.endif # CCARCH
-
 ${SYMROOTINC}/${MACHINE_ARCH}/libc-features.h:
-	${MKDIR} ${.TARGET:H}
-	${ECHO} creating ${.TARGET}
+	mkdir -p ${.TARGET:H}
+	echo creating ${.TARGET}
 	@echo '#ifndef _LIBC_FEATURES_H_' > ${.TARGET}
 	@echo '#define _LIBC_FEATURES_H_' >> ${.TARGET}
 	@echo >> ${.TARGET}
@@ -98,11 +90,6 @@
 	@echo >> ${.TARGET}
 	@echo '#endif /* _LIBC_FEATURES_H_ */' >> ${.TARGET}
 
-.ifdef FEATURE_BLOCKS
-UNIFDEFARGS += -DUNIFDEF_BLOCKS
-.else
-UNIFDEFARGS += -UUNIFDEF_BLOCKS
-.endif
 .ifdef FEATURE_LEGACY_64_APIS
 UNIFDEFARGS += -DUNIFDEF_LEGACY_64_APIS
 .else