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Makefile.include: require make version 4.

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Old versions of GNU Make (especially on OSX) are a pain to deal
with. This commit introduces a warning when such an old version
is found. The goal is the future the warning will be turned into
an error.

2020.01 is set as the date we remove support.

Complying with version 4.x is easy on OSX by using homebrew, and
on Linux, even Debian stable has the required version.
This commit is contained in:
Juan Carrano 2018-12-05 19:45:55 +01:00 committed by Juan I Carrano
parent f38d9d14c6
commit 9289fee618
1 changed files with 9 additions and 0 deletions
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9
Makefile.include
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@ -1,3 +1,12 @@
MATCH_MAKE_VERSION = 4.%
ifeq (,$(filter $(MATCH_MAKE_VERSION),$(MAKE_VERSION)))
$(warning GNU Make $(MAKE_VERSION) is DEPRECATED in RIOT. Support for \
versions less than $(MATCH_MAKE_VERSION) will be removed in \
release 2020.01. Please upgrade your system to use GNU Make \
$(MATCH_MAKE_VERSION) or later.)
endif
# 'Makefile.include' directory, must be evaluated before other 'include'
_riotbase := $(dir $(lastword $(MAKEFILE_LIST)))