mpy-cross/Makefile: Guard "override undefine" by test for make feature.

make v3.81 doesn't have "undefine" so we can't use it with that version.
crypto-aes
Damien George 6 years ago
parent 85f7b0b468
commit ed6d2547df

@ -1,6 +1,7 @@
# The following is a temporary hack to forefully undefine vars that might have
# be defined by a calling Makefile (from recursive make).
# TODO: Find a better way to be able to call this Makefile recursively.
ifneq ($(findstring undefine,$(.FEATURES)),)
override undefine COPT
override undefine CFLAGS_EXTRA
override undefine LDFLAGS_EXTRA
@ -8,6 +9,7 @@ override undefine FROZEN_DIR
override undefine FROZEN_MPY_DIR
override undefine BUILD
override undefine PROG
endif
include ../py/mkenv.mk

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